Based on "futurize -f libfuturize.fixes.fix_absolute_import"

Since circular import is not allowed in python 3, the following changes
are applied to break the circles.

* BaseTools/Source/Python/GenFds/Capsule.py
  - Delay "from .GenFds import GenFds" until GenCapsule()
  - Delay "from .GenFds import FindExtendTool" until GenFmpCapsule()
  To break the circle:
  AutoGen.AutoGen => GenFds.FdfParser => GenFds.Capsule => GenFds.GenFds =>
  GenFds.FdfParser

* BaseTools/Source/Python/GenFds/Fd.py
  - Delay "from .GenFds import GenFds" until GenFd()
  To break the circle:
  AutoGen.AutoGen => GenFds.FdfParser => GenFds.Fd => GenFds.GenFds =>
  GenFds.FdfParser

* BaseTools/Source/Python/GenFds/Fv.py
  - Delay "from .GenFds import GenFds" until AddToBuffer()
  To break the circle:
  AutoGen.AutoGen => GenFds.FdfParser => GenFds.Fd => GenFds.Fv =>
  GenFds.GenFds => GenFds.FdfParser

* BaseTools/Source/Python/GenFds/GuidSection.py
  - Delay "from .GenFds import FindExtendTool" until GuidSection()
  To break the circle:
  AutoGen.AutoGen => GenFds.FdfParser => GenFds.Fd => GenFds.Fv =>
  GenFds.AprioriSection => GenFds.FfsFileStatement => GenFds.GuidSection =>
  GenFds.GenFds => GenFds.FdfParser

* BaseTools/Source/Python/GenFds/OptRomInfStatement.py
  - Delay "from . import OptionRom" until __GetOptRomParams()
  To break the circle:
  AutoGen.AutoGen => GenFds.FdfParser => GenFds.OptionRom =>
  GenFds.OptRomInfStatement => GenFds.OptionRom

* BaseTools/Source/Python/GenFds/OptionRom.py
  - Remove the unused "from .GenFds import GenFds"
  To break the circle:
  AutoGen.AutoGen => GenFds.FdfParser => GenFds.OptionRom =>
  GenFds.GenFds => GenFds.FdfParser

Contributed-under: TianoCore Contribution Agreement 1.1
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Gary Lin <glin@suse.com>
---
 BaseTools/Source/Python/AutoGen/AutoGen.py                      | 17 +++---
 BaseTools/Source/Python/AutoGen/GenC.py                         |  7 +--
 BaseTools/Source/Python/AutoGen/GenMake.py                      |  3 +-
 BaseTools/Source/Python/AutoGen/GenPcdDb.py                     |  7 +--
 BaseTools/Source/Python/AutoGen/StrGather.py                    |  3 +-
 BaseTools/Source/Python/BPDG/BPDG.py                            |  5 +-
 BaseTools/Source/Python/BPDG/GenVpd.py                          |  3 +-
 BaseTools/Source/Python/Common/Database.py                      |  8 +--
 BaseTools/Source/Python/Common/DecClassObject.py                | 17 +++---
 BaseTools/Source/Python/Common/Dictionary.py                    |  5 +-
 BaseTools/Source/Python/Common/DscClassObject.py                | 21 ++++----
 BaseTools/Source/Python/Common/EdkIIWorkspace.py                |  3 +-
 BaseTools/Source/Python/Common/EdkIIWorkspaceBuild.py           | 19 +++----
 BaseTools/Source/Python/Common/EdkLogger.py                     |  3 +-
 BaseTools/Source/Python/Common/Expression.py                    |  3 +-
 BaseTools/Source/Python/Common/FdfClassObject.py                |  5 +-
 BaseTools/Source/Python/Common/InfClassObject.py                | 21 ++++----
 BaseTools/Source/Python/Common/LongFilePathOs.py                |  3 +-
 BaseTools/Source/Python/Common/MigrationUtilities.py            |  3 +-
 BaseTools/Source/Python/Common/Misc.py                          |  9 ++--
 BaseTools/Source/Python/Common/Parsing.py                       |  5 +-
 BaseTools/Source/Python/Common/String.py                        |  9 ++--
 BaseTools/Source/Python/Common/TargetTxtClassObject.py          |  9 ++--
 BaseTools/Source/Python/Common/ToolDefClassObject.py            |  9 ++--
 BaseTools/Source/Python/CommonDataClass/ModuleClass.py          |  3 +-
 BaseTools/Source/Python/CommonDataClass/PackageClass.py         |  3 +-
 BaseTools/Source/Python/CommonDataClass/PlatformClass.py        |  3 +-
 BaseTools/Source/Python/Ecc/CParser.py                          |  5 +-
 BaseTools/Source/Python/Ecc/Check.py                            |  9 ++--
 BaseTools/Source/Python/Ecc/CodeFragmentCollector.py            | 13 ++---
 BaseTools/Source/Python/Ecc/Database.py                         |  7 +--
 BaseTools/Source/Python/Ecc/Ecc.py                              | 25 ++++-----
 BaseTools/Source/Python/Ecc/Exception.py                        |  3 +-
 BaseTools/Source/Python/Ecc/FileProfile.py                      |  5 +-
 BaseTools/Source/Python/Ecc/MetaDataParser.py                   |  5 +-
 BaseTools/Source/Python/Ecc/MetaFileWorkspace/MetaFileParser.py |  3 +-
 BaseTools/Source/Python/Ecc/MetaFileWorkspace/MetaFileTable.py  |  5 +-
 BaseTools/Source/Python/Ecc/c.py                                | 13 ++---
 BaseTools/Source/Python/Eot/CParser.py                          |  5 +-
 BaseTools/Source/Python/Eot/CodeFragmentCollector.py            | 11 ++--
 BaseTools/Source/Python/Eot/Eot.py                              | 15 +++---
 BaseTools/Source/Python/Eot/FileProfile.py                      |  3 +-
 BaseTools/Source/Python/Eot/FvImage.py                          | 11 ++--
 BaseTools/Source/Python/Eot/InfParserLite.py                    |  5 +-
 BaseTools/Source/Python/Eot/Parser.py                           |  3 +-
 BaseTools/Source/Python/Eot/Report.py                           |  3 +-
 BaseTools/Source/Python/Eot/c.py                                |  9 ++--
 BaseTools/Source/Python/GenFds/AprioriSection.py                |  5 +-
 BaseTools/Source/Python/GenFds/Capsule.py                       |  7 +--
 BaseTools/Source/Python/GenFds/CapsuleData.py                   |  5 +-
 BaseTools/Source/Python/GenFds/CompressSection.py               |  7 +--
 BaseTools/Source/Python/GenFds/DataSection.py                   |  7 +--
 BaseTools/Source/Python/GenFds/DepexSection.py                  |  7 +--
 BaseTools/Source/Python/GenFds/EfiSection.py                    |  7 +--
 BaseTools/Source/Python/GenFds/Fd.py                            |  9 ++--
 BaseTools/Source/Python/GenFds/FdfParser.py                     | 55 ++++++++++----------
 BaseTools/Source/Python/GenFds/FfsFileStatement.py              | 11 ++--
 BaseTools/Source/Python/GenFds/FfsInfStatement.py               | 19 +++----
 BaseTools/Source/Python/GenFds/Fv.py                            | 12 ++---
 BaseTools/Source/Python/GenFds/FvImageSection.py                |  7 +--
 BaseTools/Source/Python/GenFds/GenFds.py                        | 11 ++--
 BaseTools/Source/Python/GenFds/GuidSection.py                   | 11 ++--
 BaseTools/Source/Python/GenFds/OptRomFileStatement.py           |  3 +-
 BaseTools/Source/Python/GenFds/OptRomInfStatement.py            | 16 +++---
 BaseTools/Source/Python/GenFds/OptionRom.py                     |  6 +--
 BaseTools/Source/Python/GenFds/Region.py                        |  3 +-
 BaseTools/Source/Python/GenFds/RuleComplexFile.py               |  3 +-
 BaseTools/Source/Python/GenFds/RuleSimpleFile.py                |  3 +-
 BaseTools/Source/Python/GenFds/Section.py                       |  3 +-
 BaseTools/Source/Python/GenFds/UiSection.py                     |  7 +--
 BaseTools/Source/Python/GenFds/VerSection.py                    |  7 +--
 BaseTools/Source/Python/GenFds/Vtf.py                           |  3 +-
 BaseTools/Source/Python/Table/TableDataModel.py                 |  3 +-
 BaseTools/Source/Python/Table/TableDec.py                       |  3 +-
 BaseTools/Source/Python/Table/TableDsc.py                       |  3 +-
 BaseTools/Source/Python/Table/TableEotReport.py                 |  5 +-
 BaseTools/Source/Python/Table/TableFdf.py                       |  3 +-
 BaseTools/Source/Python/Table/TableFile.py                      |  3 +-
 BaseTools/Source/Python/Table/TableFunction.py                  |  3 +-
 BaseTools/Source/Python/Table/TableIdentifier.py                |  5 +-
 BaseTools/Source/Python/Table/TableInf.py                       |  3 +-
 BaseTools/Source/Python/Table/TablePcd.py                       |  5 +-
 BaseTools/Source/Python/Table/TableQuery.py                     |  3 +-
 BaseTools/Source/Python/Table/TableReport.py                    |  3 +-
 BaseTools/Source/Python/UPT/Library/Parsing.py                  |  3 +-
 BaseTools/Source/Python/Workspace/DscBuildData.py               |  9 ++--
 BaseTools/Source/Python/Workspace/InfBuildData.py               |  3 +-
 BaseTools/Source/Python/Workspace/MetaFileParser.py             |  5 +-
 BaseTools/Source/Python/Workspace/MetaFileTable.py              |  5 +-
 BaseTools/Source/Python/Workspace/WorkspaceCommon.py            |  3 +-
 BaseTools/Source/Python/Workspace/WorkspaceDatabase.py          |  7 +--
 BaseTools/Source/Python/build/build.py                          |  3 +-
 92 files changed, 381 insertions(+), 297 deletions(-)

diff --git a/BaseTools/Source/Python/AutoGen/AutoGen.py b/BaseTools/Source/Python/AutoGen/AutoGen.py
index 2bc925aa1e08..6e8c3cc10c1e 100644
--- a/BaseTools/Source/Python/AutoGen/AutoGen.py
+++ b/BaseTools/Source/Python/AutoGen/AutoGen.py
@@ -14,6 +14,7 @@
 ## Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
 import re
@@ -21,13 +22,13 @@ import os.path as path
 import copy
 import uuid
 
-import GenC
-import GenMake
-import GenDepex
+from . import GenC
+from . import GenMake
+from . import GenDepex
 from io import BytesIO
 
-from StrGather import *
-from BuildEngine import BuildRule
+from .StrGather import *
+from .BuildEngine import BuildRule
 
 from Common.LongFilePathSupport import CopyLongFilePath
 from Common.BuildToolError import *
@@ -40,13 +41,13 @@ from CommonDataClass.CommonClass import SkuInfoClass
 from Workspace.BuildClassObject import *
 from GenPatchPcdTable.GenPatchPcdTable import parsePcdInfoFromMapFile
 import Common.VpdInfoFile as VpdInfoFile
-from GenPcdDb import CreatePcdDatabaseCode
+from .GenPcdDb import CreatePcdDatabaseCode
 from Workspace.MetaFileCommentParser import UsageList
 from Common.MultipleWorkspace import MultipleWorkspace as mws
-import InfSectionParser
+from . import InfSectionParser
 import datetime
 import hashlib
-from GenVar import VariableMgr, var_info
+from .GenVar import VariableMgr, var_info
 
 ## Regular expression for splitting Dependency Expression string into tokens
 gDepexTokenPattern = re.compile("(\(|\)|\w+| \S+\.inf)")
diff --git a/BaseTools/Source/Python/AutoGen/GenC.py b/BaseTools/Source/Python/AutoGen/GenC.py
index d68160deb4a1..adf00d9a9514 100644
--- a/BaseTools/Source/Python/AutoGen/GenC.py
+++ b/BaseTools/Source/Python/AutoGen/GenC.py
@@ -13,6 +13,7 @@
 
 ## Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
 import string
 import collections
@@ -23,9 +24,9 @@ from Common.BuildToolError import *
 from Common.DataType import *
 from Common.Misc import *
 from Common.String import StringToArray
-from StrGather import *
-from GenPcdDb import CreatePcdDatabaseCode
-from IdfClassObject import *
+from .StrGather import *
+from .GenPcdDb import CreatePcdDatabaseCode
+from .IdfClassObject import *
 
 ## PCD type string
 gItemTypeStringDatabase  = {
diff --git a/BaseTools/Source/Python/AutoGen/GenMake.py b/BaseTools/Source/Python/AutoGen/GenMake.py
index eb56d0e7c5a3..a2a6cb2ac224 100644
--- a/BaseTools/Source/Python/AutoGen/GenMake.py
+++ b/BaseTools/Source/Python/AutoGen/GenMake.py
@@ -13,6 +13,7 @@
 
 ## Import Modules
 #
+from __future__ import absolute_import
 import Common.LongFilePathOs as os
 import sys
 import string
@@ -23,7 +24,7 @@ from Common.MultipleWorkspace import MultipleWorkspace as mws
 from Common.BuildToolError import *
 from Common.Misc import *
 from Common.String import *
-from BuildEngine import *
+from .BuildEngine import *
 import Common.GlobalData as GlobalData
 
 ## Regular expression for finding header file inclusions
diff --git a/BaseTools/Source/Python/AutoGen/GenPcdDb.py b/BaseTools/Source/Python/AutoGen/GenPcdDb.py
index 716ec8ca3f52..476f5391ffdc 100644
--- a/BaseTools/Source/Python/AutoGen/GenPcdDb.py
+++ b/BaseTools/Source/Python/AutoGen/GenPcdDb.py
@@ -10,14 +10,15 @@
 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
+from __future__ import absolute_import
 from builtins import range
 from io import BytesIO
 from Common.Misc import *
 from Common.String import StringToArray
 from struct import pack
-from ValidCheckingInfoObject import VAR_CHECK_PCD_VARIABLE_TAB_CONTAINER
-from ValidCheckingInfoObject import VAR_CHECK_PCD_VARIABLE_TAB
-from ValidCheckingInfoObject import VAR_VALID_OBJECT_FACTORY
+from .ValidCheckingInfoObject import VAR_CHECK_PCD_VARIABLE_TAB_CONTAINER
+from .ValidCheckingInfoObject import VAR_CHECK_PCD_VARIABLE_TAB
+from .ValidCheckingInfoObject import VAR_VALID_OBJECT_FACTORY
 from Common.VariableAttributes import VariableAttributes
 import copy
 from struct import unpack
diff --git a/BaseTools/Source/Python/AutoGen/StrGather.py b/BaseTools/Source/Python/AutoGen/StrGather.py
index b61450c02831..f1773d99e4dd 100644
--- a/BaseTools/Source/Python/AutoGen/StrGather.py
+++ b/BaseTools/Source/Python/AutoGen/StrGather.py
@@ -14,11 +14,12 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
 import re
 import Common.EdkLogger as EdkLogger
 from Common.BuildToolError import *
-from UniClassObject import *
+from .UniClassObject import *
 from io import BytesIO
 from struct import pack, unpack
 from Common.LongFilePathSupport import OpenLongFilePath as open
diff --git a/BaseTools/Source/Python/BPDG/BPDG.py b/BaseTools/Source/Python/BPDG/BPDG.py
index 9ab13a39e8bf..8388915d8637 100644
--- a/BaseTools/Source/Python/BPDG/BPDG.py
+++ b/BaseTools/Source/Python/BPDG/BPDG.py
@@ -21,6 +21,7 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 import Common.LongFilePathOs as os
 import sys
 import encodings.ascii
@@ -30,8 +31,8 @@ from Common import EdkLogger
 from Common.BuildToolError import *
 from Common.BuildVersion import gBUILD_VERSION
 
-import StringTable as st
-import GenVpd
+from . import StringTable as st
+from . import GenVpd
 
 PROJECT_NAME       = st.LBL_BPDG_LONG_UNI
 VERSION            = (st.LBL_BPDG_VERSION + " Build " + gBUILD_VERSION)
diff --git a/BaseTools/Source/Python/BPDG/GenVpd.py b/BaseTools/Source/Python/BPDG/GenVpd.py
index 54b2cc54f578..bbccdc780fb3 100644
--- a/BaseTools/Source/Python/BPDG/GenVpd.py
+++ b/BaseTools/Source/Python/BPDG/GenVpd.py
@@ -13,10 +13,11 @@
 #  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
 from io import BytesIO
-import StringTable as st
+from . import StringTable as st
 import array
 import re
 from Common.LongFilePathSupport import OpenLongFilePath as open
diff --git a/BaseTools/Source/Python/Common/Database.py b/BaseTools/Source/Python/Common/Database.py
index a81a44731f03..c281c199effd 100644
--- a/BaseTools/Source/Python/Common/Database.py
+++ b/BaseTools/Source/Python/Common/Database.py
@@ -14,13 +14,14 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import sqlite3
 import Common.LongFilePathOs as os
 
-import EdkLogger as EdkLogger
+from . import EdkLogger as EdkLogger
 from CommonDataClass.DataClass import *
-from String import *
-from DataType import *
+from .String import *
+from .DataType import *
 
 from Table.TableDataModel import TableDataModel
 from Table.TableFile import TableFile
@@ -117,4 +118,3 @@ if __name__ == '__main__':
     Db.QueryTable(Db.TblFile)
     Db.QueryTable(Db.TblDsc)
     Db.Close()
-    
\ No newline at end of file
diff --git a/BaseTools/Source/Python/Common/DecClassObject.py b/BaseTools/Source/Python/Common/DecClassObject.py
index 970e644318d0..71cd2d33000e 100644
--- a/BaseTools/Source/Python/Common/DecClassObject.py
+++ b/BaseTools/Source/Python/Common/DecClassObject.py
@@ -15,18 +15,19 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 import Common.LongFilePathOs as os
-from String import *
-from DataType import *
-from Identification import *
-from Dictionary import *
+from .String import *
+from .DataType import *
+from .Identification import *
+from .Dictionary import *
 from CommonDataClass.PackageClass import *
 from CommonDataClass.CommonClass import PcdClass
-from BuildToolError import *
+from .BuildToolError import *
 from Table.TableDec import TableDec
-import Database
-from Parsing import *
-import GlobalData
+from . import Database
+from .Parsing import *
+from . import GlobalData
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
 #
diff --git a/BaseTools/Source/Python/Common/Dictionary.py b/BaseTools/Source/Python/Common/Dictionary.py
index c381995f97ff..149081be2831 100644
--- a/BaseTools/Source/Python/Common/Dictionary.py
+++ b/BaseTools/Source/Python/Common/Dictionary.py
@@ -15,8 +15,9 @@
 # Import Modules
 #
 from __future__ import print_function
-import EdkLogger
-from DataType import *
+from __future__ import absolute_import
+from . import EdkLogger
+from .DataType import *
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
 ## Convert a text file to a dictionary
diff --git a/BaseTools/Source/Python/Common/DscClassObject.py b/BaseTools/Source/Python/Common/DscClassObject.py
index e6abc1f036ac..d4ebddadc74a 100644
--- a/BaseTools/Source/Python/Common/DscClassObject.py
+++ b/BaseTools/Source/Python/Common/DscClassObject.py
@@ -15,20 +15,21 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
-import EdkLogger as EdkLogger
-import Database
-from String import *
-from Parsing import *
-from DataType import *
-from Identification import *
-from Dictionary import *
+from . import EdkLogger as EdkLogger
+from . import Database
+from .String import *
+from .Parsing import *
+from .DataType import *
+from .Identification import *
+from .Dictionary import *
 from CommonDataClass.PlatformClass import *
 from CommonDataClass.CommonClass import SkuInfoClass
-from BuildToolError import *
-from Misc import sdict
-import GlobalData
+from .BuildToolError import *
+from .Misc import sdict
+from . import GlobalData
 from Table.TableDsc import TableDsc
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
diff --git a/BaseTools/Source/Python/Common/EdkIIWorkspace.py b/BaseTools/Source/Python/Common/EdkIIWorkspace.py
index 52f63ae53df8..4f7e69ca5ef2 100644
--- a/BaseTools/Source/Python/Common/EdkIIWorkspace.py
+++ b/BaseTools/Source/Python/Common/EdkIIWorkspace.py
@@ -15,8 +15,9 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 import Common.LongFilePathOs as os, sys, time
-from DataType import *
+from .DataType import *
 from Common.LongFilePathSupport import OpenLongFilePath as open
 from Common.MultipleWorkspace import MultipleWorkspace as mws
 
diff --git a/BaseTools/Source/Python/Common/EdkIIWorkspaceBuild.py b/BaseTools/Source/Python/Common/EdkIIWorkspaceBuild.py
index a2f7c94c1ca7..2b4dc720cea9 100644
--- a/BaseTools/Source/Python/Common/EdkIIWorkspaceBuild.py
+++ b/BaseTools/Source/Python/Common/EdkIIWorkspaceBuild.py
@@ -15,16 +15,17 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 import Common.LongFilePathOs as os, string, copy, pdb, copy
-import EdkLogger
-import DataType
-from InfClassObject import *
-from DecClassObject import *
-from DscClassObject import *
-from String import *
-from BuildToolError import *
-from Misc import sdict
-import Database as Database
+from . import EdkLogger
+from . import DataType
+from .InfClassObject import *
+from .DecClassObject import *
+from .DscClassObject import *
+from .String import *
+from .BuildToolError import *
+from .Misc import sdict
+from . import Database as Database
 import time as time
 
 ## PcdClassObject
diff --git a/BaseTools/Source/Python/Common/EdkLogger.py b/BaseTools/Source/Python/Common/EdkLogger.py
index ac1c8edc4fe2..636ac908c320 100644
--- a/BaseTools/Source/Python/Common/EdkLogger.py
+++ b/BaseTools/Source/Python/Common/EdkLogger.py
@@ -12,9 +12,10 @@
 #
 
 ## Import modules
+from __future__ import absolute_import
 import Common.LongFilePathOs as os, sys, logging
 import traceback
-from  BuildToolError import *
+from  .BuildToolError import *
 
 ## Log level constants
 DEBUG_0 = 1
diff --git a/BaseTools/Source/Python/Common/Expression.py b/BaseTools/Source/Python/Common/Expression.py
index 3b5afdc9ab06..afe80e690877 100644
--- a/BaseTools/Source/Python/Common/Expression.py
+++ b/BaseTools/Source/Python/Common/Expression.py
@@ -13,11 +13,12 @@
 ## Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 from builtins import range
 from Common.GlobalData import *
 from CommonDataClass.Exceptions import BadExpression
 from CommonDataClass.Exceptions import WrnExpression
-from Misc import GuidStringToGuidStructureString, ParseFieldValue
+from .Misc import GuidStringToGuidStructureString, ParseFieldValue
 import Common.EdkLogger as EdkLogger
 import copy
 
diff --git a/BaseTools/Source/Python/Common/FdfClassObject.py b/BaseTools/Source/Python/Common/FdfClassObject.py
index 7ec0235967b2..b0ab8010343a 100644
--- a/BaseTools/Source/Python/Common/FdfClassObject.py
+++ b/BaseTools/Source/Python/Common/FdfClassObject.py
@@ -14,11 +14,12 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
-from FdfParserLite import FdfParser
+from .FdfParserLite import FdfParser
 from Table.TableFdf import TableFdf
 from CommonDataClass.DataClass import MODEL_FILE_FDF, MODEL_PCD, MODEL_META_DATA_COMPONENT
-from String import NormPath
+from .String import NormPath
 
 ## FdfObject
 #
diff --git a/BaseTools/Source/Python/Common/InfClassObject.py b/BaseTools/Source/Python/Common/InfClassObject.py
index fe82ffd8eb4e..54f99c83910e 100644
--- a/BaseTools/Source/Python/Common/InfClassObject.py
+++ b/BaseTools/Source/Python/Common/InfClassObject.py
@@ -15,21 +15,22 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 import Common.LongFilePathOs as os
 import re
-import EdkLogger
+from . import EdkLogger
 from CommonDataClass.CommonClass import LibraryClassClass
 from CommonDataClass.ModuleClass import *
-from String import *
-from DataType import *
-from Identification import *
-from Dictionary import *
-from BuildToolError import *
-from Misc import sdict
-import GlobalData
+from .String import *
+from .DataType import *
+from .Identification import *
+from .Dictionary import *
+from .BuildToolError import *
+from .Misc import sdict
+from . import GlobalData
 from Table.TableInf import TableInf
-import Database
-from Parsing import *
+from . import Database
+from .Parsing import *
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
 #
diff --git a/BaseTools/Source/Python/Common/LongFilePathOs.py b/BaseTools/Source/Python/Common/LongFilePathOs.py
index 47d63faeb995..a32205545368 100644
--- a/BaseTools/Source/Python/Common/LongFilePathOs.py
+++ b/BaseTools/Source/Python/Common/LongFilePathOs.py
@@ -11,8 +11,9 @@
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 
+from __future__ import absolute_import
 import os
-import LongFilePathOsPath
+from . import LongFilePathOsPath
 from Common.LongFilePathSupport import LongFilePath
 from Common.LongFilePathSupport import UniToStr
 
diff --git a/BaseTools/Source/Python/Common/MigrationUtilities.py b/BaseTools/Source/Python/Common/MigrationUtilities.py
index 2385988247d4..88038046835a 100644
--- a/BaseTools/Source/Python/Common/MigrationUtilities.py
+++ b/BaseTools/Source/Python/Common/MigrationUtilities.py
@@ -14,10 +14,11 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
 import re
-import EdkLogger
+from . import EdkLogger
 from optparse import OptionParser
 from Common.BuildToolError import *
 from XmlRoutines import *
diff --git a/BaseTools/Source/Python/Common/Misc.py b/BaseTools/Source/Python/Common/Misc.py
index 1a7418734cf8..5d7b0cf9ddc5 100644
--- a/BaseTools/Source/Python/Common/Misc.py
+++ b/BaseTools/Source/Python/Common/Misc.py
@@ -14,6 +14,7 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
 import sys
@@ -31,10 +32,10 @@ from UserList import UserList
 
 from Common import EdkLogger as EdkLogger
 from Common import GlobalData as GlobalData
-from DataType import *
-from BuildToolError import *
+from .DataType import *
+from .BuildToolError import *
 from CommonDataClass.DataClass import *
-from Parsing import GetSplitValueList
+from .Parsing import GetSplitValueList
 from Common.LongFilePathSupport import OpenLongFilePath as open
 from Common.MultipleWorkspace import MultipleWorkspace as mws
 import uuid
@@ -512,7 +513,7 @@ def SaveFileOnChange(File, Content, IsBinaryFile=True):
     try:
         if GlobalData.gIsWindows:
             try:
-                from PyUtility import SaveFileToDisk
+                from .PyUtility import SaveFileToDisk
                 if not SaveFileToDisk(File, Content):
                     EdkLogger.error(None, FILE_CREATE_FAILURE, ExtraData=File)
             except:
diff --git a/BaseTools/Source/Python/Common/Parsing.py b/BaseTools/Source/Python/Common/Parsing.py
index 9caa9424d8ed..ebbb9f564320 100644
--- a/BaseTools/Source/Python/Common/Parsing.py
+++ b/BaseTools/Source/Python/Common/Parsing.py
@@ -14,10 +14,11 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
-from String import *
+from .String import *
 from CommonDataClass.DataClass import *
-from DataType import *
+from .DataType import *
 
 ## ParseDefineMacro
 #
diff --git a/BaseTools/Source/Python/Common/String.py b/BaseTools/Source/Python/Common/String.py
index d2ec46d84eb8..d5932b367d69 100644
--- a/BaseTools/Source/Python/Common/String.py
+++ b/BaseTools/Source/Python/Common/String.py
@@ -14,15 +14,16 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
 import re
-import DataType
+from . import DataType
 import Common.LongFilePathOs as os
 import string
-import EdkLogger as EdkLogger
+from . import EdkLogger as EdkLogger
 
-import GlobalData
-from BuildToolError import *
+from . import GlobalData
+from .BuildToolError import *
 from CommonDataClass.Exceptions import *
 from Common.LongFilePathSupport import OpenLongFilePath as open
 from Common.MultipleWorkspace import MultipleWorkspace as mws
diff --git a/BaseTools/Source/Python/Common/TargetTxtClassObject.py b/BaseTools/Source/Python/Common/TargetTxtClassObject.py
index 9c1e6b407356..b4ad4f1d290a 100644
--- a/BaseTools/Source/Python/Common/TargetTxtClassObject.py
+++ b/BaseTools/Source/Python/Common/TargetTxtClassObject.py
@@ -15,11 +15,12 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 import Common.LongFilePathOs as os
-import EdkLogger
-import DataType
-from BuildToolError import *
-import GlobalData
+from . import EdkLogger
+from . import DataType
+from .BuildToolError import *
+from . import GlobalData
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
 gDefaultTargetTxtFile = "target.txt"
diff --git a/BaseTools/Source/Python/Common/ToolDefClassObject.py b/BaseTools/Source/Python/Common/ToolDefClassObject.py
index d3587b171192..639ca176695c 100644
--- a/BaseTools/Source/Python/Common/ToolDefClassObject.py
+++ b/BaseTools/Source/Python/Common/ToolDefClassObject.py
@@ -14,14 +14,15 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
 import re
-import EdkLogger
+from . import EdkLogger
 
-from Dictionary import *
-from BuildToolError import *
-from TargetTxtClassObject import *
+from .Dictionary import *
+from .BuildToolError import *
+from .TargetTxtClassObject import *
 from Common.LongFilePathSupport import OpenLongFilePath as open
 from Common.Misc import PathClass
 from Common.String import NormPath
diff --git a/BaseTools/Source/Python/CommonDataClass/ModuleClass.py b/BaseTools/Source/Python/CommonDataClass/ModuleClass.py
index c5ea15af5b97..54cc3e92e108 100644
--- a/BaseTools/Source/Python/CommonDataClass/ModuleClass.py
+++ b/BaseTools/Source/Python/CommonDataClass/ModuleClass.py
@@ -13,7 +13,8 @@
 ##
 # Import Modules
 #
-from CommonClass import *
+from __future__ import absolute_import
+from .CommonClass import *
 
 ## ModuleHeaderClass
 #
diff --git a/BaseTools/Source/Python/CommonDataClass/PackageClass.py b/BaseTools/Source/Python/CommonDataClass/PackageClass.py
index 89d4d0797fe1..d2ef29aea312 100644
--- a/BaseTools/Source/Python/CommonDataClass/PackageClass.py
+++ b/BaseTools/Source/Python/CommonDataClass/PackageClass.py
@@ -13,7 +13,8 @@
 ##
 # Import Modules
 #
-from CommonClass import *
+from __future__ import absolute_import
+from .CommonClass import *
 from Common.Misc import sdict
 
 ## PackageHeaderClass
diff --git a/BaseTools/Source/Python/CommonDataClass/PlatformClass.py b/BaseTools/Source/Python/CommonDataClass/PlatformClass.py
index a93d1ce2a1db..ee656e4d55e2 100644
--- a/BaseTools/Source/Python/CommonDataClass/PlatformClass.py
+++ b/BaseTools/Source/Python/CommonDataClass/PlatformClass.py
@@ -13,7 +13,8 @@
 ##
 # Import Modules
 #
-from CommonClass import *
+from __future__ import absolute_import
+from .CommonClass import *
 
 ## SkuInfoListClass
 #
diff --git a/BaseTools/Source/Python/Ecc/CParser.py b/BaseTools/Source/Python/Ecc/CParser.py
index bd4f10e1edff..02d70e73cbb8 100644
--- a/BaseTools/Source/Python/Ecc/CParser.py
+++ b/BaseTools/Source/Python/Ecc/CParser.py
@@ -1,4 +1,5 @@
 from __future__ import print_function
+from __future__ import absolute_import
 # $ANTLR 3.0.1 C.g 2010-02-23 09:58:53
 
 from antlr3 import *
@@ -23,8 +24,8 @@ from antlr3.compat import set, frozenset
 #
 ##
 
-import CodeFragment
-import FileProfile
+from . import CodeFragment
+from . import FileProfile
 
 
 
diff --git a/BaseTools/Source/Python/Ecc/Check.py b/BaseTools/Source/Python/Ecc/Check.py
index 92259999853c..339a6ddca471 100644
--- a/BaseTools/Source/Python/Ecc/Check.py
+++ b/BaseTools/Source/Python/Ecc/Check.py
@@ -10,15 +10,16 @@
 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
 import re
 from CommonDataClass.DataClass import *
 import Common.DataType as DT
-from EccToolError import *
-from MetaDataParser import ParseHeaderCommentSection
-import EccGlobalData
-import c
+from .EccToolError import *
+from .MetaDataParser import ParseHeaderCommentSection
+from . import EccGlobalData
+from . import c
 from Common.LongFilePathSupport import OpenLongFilePath as open
 from Common.MultipleWorkspace import MultipleWorkspace as mws
 
diff --git a/BaseTools/Source/Python/Ecc/CodeFragmentCollector.py b/BaseTools/Source/Python/Ecc/CodeFragmentCollector.py
index 7bdb3cc3aea5..f96ea2fec6d2 100644
--- a/BaseTools/Source/Python/Ecc/CodeFragmentCollector.py
+++ b/BaseTools/Source/Python/Ecc/CodeFragmentCollector.py
@@ -17,18 +17,19 @@
 #
 
 from __future__ import print_function
+from __future__ import absolute_import
 import re
 import Common.LongFilePathOs as os
 import sys
 
 import antlr3
-from CLexer import CLexer
-from CParser import CParser
+from .CLexer import CLexer
+from .CParser import CParser
 
-import FileProfile
-from CodeFragment import Comment
-from CodeFragment import PP_Directive
-from ParserWarning import Warning
+from . import FileProfile
+from .CodeFragment import Comment
+from .CodeFragment import PP_Directive
+from .ParserWarning import Warning
 
 
 ##define T_CHAR_SPACE                ' '
diff --git a/BaseTools/Source/Python/Ecc/Database.py b/BaseTools/Source/Python/Ecc/Database.py
index 204117512452..34f49f3cba8b 100644
--- a/BaseTools/Source/Python/Ecc/Database.py
+++ b/BaseTools/Source/Python/Ecc/Database.py
@@ -14,6 +14,7 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import sqlite3
 import Common.LongFilePathOs as os, time
 
@@ -26,9 +27,9 @@ from Table.TableFunction import TableFunction
 from Table.TablePcd import TablePcd
 from Table.TableIdentifier import TableIdentifier
 from Table.TableReport import TableReport
-from MetaFileWorkspace.MetaFileTable import ModuleTable
-from MetaFileWorkspace.MetaFileTable import PackageTable
-from MetaFileWorkspace.MetaFileTable import PlatformTable
+from .MetaFileWorkspace.MetaFileTable import ModuleTable
+from .MetaFileWorkspace.MetaFileTable import PackageTable
+from .MetaFileWorkspace.MetaFileTable import PlatformTable
 from Table.TableFdf import TableFdf
 
 ##
diff --git a/BaseTools/Source/Python/Ecc/Ecc.py b/BaseTools/Source/Python/Ecc/Ecc.py
index 94f9a427e370..46c79f169334 100644
--- a/BaseTools/Source/Python/Ecc/Ecc.py
+++ b/BaseTools/Source/Python/Ecc/Ecc.py
@@ -14,14 +14,15 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.LongFilePathOs as os, time, glob, sys
 import Common.EdkLogger as EdkLogger
-import Database
-import EccGlobalData
-from MetaDataParser import *
+from . import Database
+from . import EccGlobalData
+from .MetaDataParser import *
 from optparse import OptionParser
-from Configuration import Configuration
-from Check import Check
+from .Configuration import Configuration
+from .Check import Check
 import Common.GlobalData as GlobalData
 
 from Common.String import NormPath
@@ -29,14 +30,14 @@ from Common.BuildVersion import gBUILD_VERSION
 from Common import BuildToolError
 from Common.Misc import PathClass
 from Common.Misc import DirCache
-from MetaFileWorkspace.MetaFileParser import DscParser
-from MetaFileWorkspace.MetaFileParser import DecParser
-from MetaFileWorkspace.MetaFileParser import InfParser
-from MetaFileWorkspace.MetaFileParser import Fdf
-from MetaFileWorkspace.MetaFileTable import MetaFileStorage
-import c
+from .MetaFileWorkspace.MetaFileParser import DscParser
+from .MetaFileWorkspace.MetaFileParser import DecParser
+from .MetaFileWorkspace.MetaFileParser import InfParser
+from .MetaFileWorkspace.MetaFileParser import Fdf
+from .MetaFileWorkspace.MetaFileTable import MetaFileStorage
+from . import c
 import re, string
-from Exception import *
+from .Exception import *
 from Common.LongFilePathSupport import OpenLongFilePath as open
 from Common.MultipleWorkspace import MultipleWorkspace as mws
 
diff --git a/BaseTools/Source/Python/Ecc/Exception.py b/BaseTools/Source/Python/Ecc/Exception.py
index bde41c3a4b57..ba43ebe03fdb 100644
--- a/BaseTools/Source/Python/Ecc/Exception.py
+++ b/BaseTools/Source/Python/Ecc/Exception.py
@@ -15,7 +15,8 @@
 # Import Modules
 #
 from __future__ import print_function
-from Xml.XmlRoutines import *
+from __future__ import absolute_import
+from .Xml.XmlRoutines import *
 import Common.LongFilePathOs as os
 
 # ExceptionXml to parse Exception Node of XML file
diff --git a/BaseTools/Source/Python/Ecc/FileProfile.py b/BaseTools/Source/Python/Ecc/FileProfile.py
index f31d37ff9683..6f93cbf60479 100644
--- a/BaseTools/Source/Python/Ecc/FileProfile.py
+++ b/BaseTools/Source/Python/Ecc/FileProfile.py
@@ -16,9 +16,10 @@
 # Import Modules
 #
 
+from __future__ import absolute_import
 import re
 import Common.LongFilePathOs as os
-from ParserWarning import Warning
+from .ParserWarning import Warning
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
 CommentList = []
@@ -54,5 +55,3 @@ class FileProfile :
 
         except IOError:
             raise Warning("Error when opening file %s" % FileName)
-        
-        
\ No newline at end of file
diff --git a/BaseTools/Source/Python/Ecc/MetaDataParser.py b/BaseTools/Source/Python/Ecc/MetaDataParser.py
index 9b8b96aa4b43..545a9c3b20b4 100644
--- a/BaseTools/Source/Python/Ecc/MetaDataParser.py
+++ b/BaseTools/Source/Python/Ecc/MetaDataParser.py
@@ -11,12 +11,13 @@
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
 from CommonDataClass.DataClass import *
-from EccToolError import *
+from .EccToolError import *
 from Common.MultipleWorkspace import MultipleWorkspace as mws
-import EccGlobalData
+from . import EccGlobalData
 import re
 ## Get the inlcude path list for a source file
 #
diff --git a/BaseTools/Source/Python/Ecc/MetaFileWorkspace/MetaFileParser.py b/BaseTools/Source/Python/Ecc/MetaFileWorkspace/MetaFileParser.py
index 605a1d847c61..83676422692b 100644
--- a/BaseTools/Source/Python/Ecc/MetaFileWorkspace/MetaFileParser.py
+++ b/BaseTools/Source/Python/Ecc/MetaFileWorkspace/MetaFileParser.py
@@ -14,6 +14,7 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
 import re
@@ -32,7 +33,7 @@ from Common.Misc import GuidStructureStringToGuidString, CheckPcdDatum, PathClas
 from Common.Expression import *
 from CommonDataClass.Exceptions import *
 
-from MetaFileTable import MetaFileStorage
+from .MetaFileTable import MetaFileStorage
 from GenFds.FdfParser import FdfParser
 from Common.LongFilePathSupport import OpenLongFilePath as open
 from Common.LongFilePathSupport import CodecOpenLongFilePath
diff --git a/BaseTools/Source/Python/Ecc/MetaFileWorkspace/MetaFileTable.py b/BaseTools/Source/Python/Ecc/MetaFileWorkspace/MetaFileTable.py
index 54a3016948b1..f70a2f238334 100644
--- a/BaseTools/Source/Python/Ecc/MetaFileWorkspace/MetaFileTable.py
+++ b/BaseTools/Source/Python/Ecc/MetaFileWorkspace/MetaFileTable.py
@@ -14,13 +14,14 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import uuid
 
 import Common.EdkLogger as EdkLogger
 import EccGlobalData
 
-from MetaDataTable import Table
-from MetaDataTable import ConvertToSqlString
+from .MetaDataTable import Table
+from .MetaDataTable import ConvertToSqlString
 from CommonDataClass.DataClass import MODEL_FILE_DSC, MODEL_FILE_DEC, MODEL_FILE_INF, \
                                       MODEL_FILE_OTHERS
 
diff --git a/BaseTools/Source/Python/Ecc/c.py b/BaseTools/Source/Python/Ecc/c.py
index 7f83387c08c8..56eb21ead519 100644
--- a/BaseTools/Source/Python/Ecc/c.py
+++ b/BaseTools/Source/Python/Ecc/c.py
@@ -12,18 +12,19 @@
 #
 
 from __future__ import print_function
+from __future__ import absolute_import
 import sys
 import Common.LongFilePathOs as os
 import re
 import string
-import CodeFragmentCollector
-import FileProfile
+from . import CodeFragmentCollector
+from . import FileProfile
 from CommonDataClass import DataClass
-import Database
+from . import Database
 from Common import EdkLogger
-from EccToolError import *
-import EccGlobalData
-import MetaDataParser
+from .EccToolError import *
+from . import EccGlobalData
+from . import MetaDataParser
 
 IncludeFileListDict = {}
 AllIncludeFileListDict = {}
diff --git a/BaseTools/Source/Python/Eot/CParser.py b/BaseTools/Source/Python/Eot/CParser.py
index bd4f10e1edff..02d70e73cbb8 100644
--- a/BaseTools/Source/Python/Eot/CParser.py
+++ b/BaseTools/Source/Python/Eot/CParser.py
@@ -1,4 +1,5 @@
 from __future__ import print_function
+from __future__ import absolute_import
 # $ANTLR 3.0.1 C.g 2010-02-23 09:58:53
 
 from antlr3 import *
@@ -23,8 +24,8 @@ from antlr3.compat import set, frozenset
 #
 ##
 
-import CodeFragment
-import FileProfile
+from . import CodeFragment
+from . import FileProfile
 
 
 
diff --git a/BaseTools/Source/Python/Eot/CodeFragmentCollector.py b/BaseTools/Source/Python/Eot/CodeFragmentCollector.py
index 5d5336bee463..b92f81ad514d 100644
--- a/BaseTools/Source/Python/Eot/CodeFragmentCollector.py
+++ b/BaseTools/Source/Python/Eot/CodeFragmentCollector.py
@@ -16,17 +16,18 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 import re
 import Common.LongFilePathOs as os
 import sys
 
 import antlr3
-from CLexer import CLexer
-from CParser import CParser
+from .CLexer import CLexer
+from .CParser import CParser
 
-import FileProfile
-from CodeFragment import PP_Directive
-from ParserWarning import Warning
+from . import FileProfile
+from .CodeFragment import PP_Directive
+from .ParserWarning import Warning
 
 
 ##define T_CHAR_SPACE                ' '
diff --git a/BaseTools/Source/Python/Eot/Eot.py b/BaseTools/Source/Python/Eot/Eot.py
index 5029f7369d4a..1905b06aefab 100644
--- a/BaseTools/Source/Python/Eot/Eot.py
+++ b/BaseTools/Source/Python/Eot/Eot.py
@@ -14,22 +14,23 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.LongFilePathOs as os, time, glob
 import Common.EdkLogger as EdkLogger
-import EotGlobalData
+from . import EotGlobalData
 from optparse import OptionParser
 from Common.String import NormPath
 from Common import BuildToolError
 from Common.Misc import GuidStructureStringToGuidString
-from InfParserLite import *
-import c
-import Database
-from FvImage import *
+from .InfParserLite import *
+from . import c
+from . import Database
+from .FvImage import *
 from array import array
-from Report import Report
+from .Report import Report
 from Common.Misc import ParseConsoleLog
 from Common.BuildVersion import gBUILD_VERSION
-from Parser import ConvertGuid
+from .Parser import ConvertGuid
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
 ## Class Eot
diff --git a/BaseTools/Source/Python/Eot/FileProfile.py b/BaseTools/Source/Python/Eot/FileProfile.py
index 0544c0d55b44..3846279cad4c 100644
--- a/BaseTools/Source/Python/Eot/FileProfile.py
+++ b/BaseTools/Source/Python/Eot/FileProfile.py
@@ -16,9 +16,10 @@
 # Import Modules
 #
 
+from __future__ import absolute_import
 import re
 import Common.LongFilePathOs as os
-from ParserWarning import Warning
+from .ParserWarning import Warning
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
 # Profile contents of a file
diff --git a/BaseTools/Source/Python/Eot/FvImage.py b/BaseTools/Source/Python/Eot/FvImage.py
index 0a1eca1ed86f..085698557efe 100644
--- a/BaseTools/Source/Python/Eot/FvImage.py
+++ b/BaseTools/Source/Python/Eot/FvImage.py
@@ -14,6 +14,7 @@
 ## Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
 import re
@@ -31,7 +32,7 @@ from Common.Misc import sdict, GuidStructureStringToGuidString
 
 import Common.EdkLogger as EdkLogger
 
-import EotGlobalData
+from . import EotGlobalData
 
 # Global definiton
 gFfsPrintTitle  = "%-36s  %-21s %8s %8s %8s  %-4s %-36s" % ("GUID", "TYPE", "OFFSET", "SIZE", "FREE", "ALIGN", "NAME")
@@ -557,7 +558,7 @@ class CompressedImage(Image):
 
     def _GetSections(m):
         try:
-            import EfiCompressor
+            from . import EfiCompressor
             TmpData = EfiCompressor.FrameworkDecompress(
                                         m[m._HEADER_SIZE_:],
                                         len(m) - m._HEADER_SIZE_
@@ -565,7 +566,7 @@ class CompressedImage(Image):
             DecData = array('B')
             DecData.fromstring(TmpData)
         except:
-            import EfiCompressor
+            from . import EfiCompressor
             TmpData = EfiCompressor.UefiDecompress(
                                         m[m._HEADER_SIZE_:],
                                         len(m) - m._HEADER_SIZE_
@@ -665,7 +666,7 @@ class GuidDefinedImage(Image):
                 SectionList.append(Sec)
         elif Guid == m.TIANO_COMPRESS_GUID:
             try:
-                import EfiCompressor
+                from . import EfiCompressor
                 # skip the header
                 Offset = m.DataOffset - 4
                 TmpData = EfiCompressor.FrameworkDecompress(m[Offset:], len(m)-Offset)
@@ -686,7 +687,7 @@ class GuidDefinedImage(Image):
                 pass
         elif Guid == m.LZMA_COMPRESS_GUID:
             try:
-                import LzmaCompressor
+                from . import LzmaCompressor
                 # skip the header
                 Offset = m.DataOffset - 4
                 TmpData = LzmaCompressor.LzmaDecompress(m[Offset:], len(m)-Offset)
diff --git a/BaseTools/Source/Python/Eot/InfParserLite.py b/BaseTools/Source/Python/Eot/InfParserLite.py
index 4bdd60a6f71c..4080dc852008 100644
--- a/BaseTools/Source/Python/Eot/InfParserLite.py
+++ b/BaseTools/Source/Python/Eot/InfParserLite.py
@@ -15,6 +15,7 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
 import Common.EdkLogger as EdkLogger
@@ -22,8 +23,8 @@ from Common.DataType import *
 from CommonDataClass.DataClass import *
 from Common.Identification import *
 from Common.String import *
-from Parser import *
-import Database
+from .Parser import *
+from . import Database
 
 ## EdkInfParser() class
 #
diff --git a/BaseTools/Source/Python/Eot/Parser.py b/BaseTools/Source/Python/Eot/Parser.py
index 951fe7e3be2e..8703e2d55552 100644
--- a/BaseTools/Source/Python/Eot/Parser.py
+++ b/BaseTools/Source/Python/Eot/Parser.py
@@ -15,12 +15,13 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.LongFilePathOs as os, re
 import Common.EdkLogger as EdkLogger
 from Common.DataType import *
 from CommonDataClass.DataClass import *
 from Common.String import CleanString, GetSplitValueList, ReplaceMacro
-import EotGlobalData
+from . import EotGlobalData
 from Common.Misc import sdict
 from Common.String import GetSplitList
 from Common.LongFilePathSupport import OpenLongFilePath as open
diff --git a/BaseTools/Source/Python/Eot/Report.py b/BaseTools/Source/Python/Eot/Report.py
index 386e3eb8ec05..6440ede6bce3 100644
--- a/BaseTools/Source/Python/Eot/Report.py
+++ b/BaseTools/Source/Python/Eot/Report.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 ## @file
 # This file is used to create report for Eot tool
 #
@@ -15,7 +16,7 @@
 # Import Modules
 #
 import Common.LongFilePathOs as os
-import EotGlobalData
+from . import EotGlobalData
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
 ## Report() class
diff --git a/BaseTools/Source/Python/Eot/c.py b/BaseTools/Source/Python/Eot/c.py
index ceefc952237f..4f0b58a52c79 100644
--- a/BaseTools/Source/Python/Eot/c.py
+++ b/BaseTools/Source/Python/Eot/c.py
@@ -16,15 +16,16 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 import sys
 import Common.LongFilePathOs as os
 import re
-import CodeFragmentCollector
-import FileProfile
+from . import CodeFragmentCollector
+from . import FileProfile
 from CommonDataClass import DataClass
 from Common import EdkLogger
-from EotToolError import *
-import EotGlobalData
+from .EotToolError import *
+from . import EotGlobalData
 
 # Global Dicts
 IncludeFileListDict = {}
diff --git a/BaseTools/Source/Python/GenFds/AprioriSection.py b/BaseTools/Source/Python/GenFds/AprioriSection.py
index 65919270af15..983c89e82970 100644
--- a/BaseTools/Source/Python/GenFds/AprioriSection.py
+++ b/BaseTools/Source/Python/GenFds/AprioriSection.py
@@ -15,12 +15,13 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
 from struct import *
 import Common.LongFilePathOs as os
 from io import BytesIO
-import FfsFileStatement
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from . import FfsFileStatement
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from CommonDataClass.FdfClass import AprioriSectionClassObject
 from Common.String import *
 from Common.Misc import SaveFileOnChange, PathClass
diff --git a/BaseTools/Source/Python/GenFds/Capsule.py b/BaseTools/Source/Python/GenFds/Capsule.py
index 60019195df27..fb929065634e 100644
--- a/BaseTools/Source/Python/GenFds/Capsule.py
+++ b/BaseTools/Source/Python/GenFds/Capsule.py
@@ -15,17 +15,16 @@
 ##
 # Import Modules
 #
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from __future__ import absolute_import
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from CommonDataClass.FdfClass import CapsuleClassObject
 import Common.LongFilePathOs as os
 import subprocess
 from io import BytesIO
 from Common.Misc import SaveFileOnChange
-from GenFds import GenFds
 from Common.Misc import PackRegistryFormatGuid
 import uuid
 from struct import pack
-from GenFds import FindExtendTool
 from Common import EdkLogger
 from Common.BuildToolError import *
 
@@ -57,6 +56,7 @@ class Capsule (CapsuleClassObject) :
     #   @retval string      Generated Capsule file path
     #
     def GenFmpCapsule(self):
+        from .GenFds import FindExtendTool
         #
         # Generate capsule header
         # typedef struct {
@@ -201,6 +201,7 @@ class Capsule (CapsuleClassObject) :
     #   @retval string      Generated Capsule file path
     #
     def GenCapsule(self):
+        from .GenFds import GenFds
         if self.UiCapsuleName.upper() + 'cap' in GenFds.ImageBinDict.keys():
             return GenFds.ImageBinDict[self.UiCapsuleName.upper() + 'cap']
 
diff --git a/BaseTools/Source/Python/GenFds/CapsuleData.py b/BaseTools/Source/Python/GenFds/CapsuleData.py
index f0a55d81120b..d7208deea1e3 100644
--- a/BaseTools/Source/Python/GenFds/CapsuleData.py
+++ b/BaseTools/Source/Python/GenFds/CapsuleData.py
@@ -15,8 +15,9 @@
 ##
 # Import Modules
 #
-import Ffs
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from __future__ import absolute_import
+from . import Ffs
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from io import BytesIO
 from struct import pack
 import os
diff --git a/BaseTools/Source/Python/GenFds/CompressSection.py b/BaseTools/Source/Python/GenFds/CompressSection.py
index 64ad275d832e..ae4866661de6 100644
--- a/BaseTools/Source/Python/GenFds/CompressSection.py
+++ b/BaseTools/Source/Python/GenFds/CompressSection.py
@@ -15,11 +15,12 @@
 ##
 # Import Modules
 #
-from Ffs import Ffs
-import Section
+from __future__ import absolute_import
+from .Ffs import Ffs
+from . import Section
 import subprocess
 import Common.LongFilePathOs as os
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from CommonDataClass.FdfClass import CompressSectionClassObject
 
 ## generate compress section
diff --git a/BaseTools/Source/Python/GenFds/DataSection.py b/BaseTools/Source/Python/GenFds/DataSection.py
index 2d2975f75c0f..cf0d27d83e08 100644
--- a/BaseTools/Source/Python/GenFds/DataSection.py
+++ b/BaseTools/Source/Python/GenFds/DataSection.py
@@ -15,10 +15,11 @@
 ##
 # Import Modules
 #
-import Section
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from __future__ import absolute_import
+from . import Section
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 import subprocess
-from Ffs import Ffs
+from .Ffs import Ffs
 import Common.LongFilePathOs as os
 from CommonDataClass.FdfClass import DataSectionClassObject
 from Common.Misc import PeImageClass
diff --git a/BaseTools/Source/Python/GenFds/DepexSection.py b/BaseTools/Source/Python/GenFds/DepexSection.py
index 1992d2abd807..d67321473268 100644
--- a/BaseTools/Source/Python/GenFds/DepexSection.py
+++ b/BaseTools/Source/Python/GenFds/DepexSection.py
@@ -15,10 +15,11 @@
 ##
 # Import Modules
 #
-import Section
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from __future__ import absolute_import
+from . import Section
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 import subprocess
-from Ffs import Ffs
+from .Ffs import Ffs
 import Common.LongFilePathOs as os
 from CommonDataClass.FdfClass import DepexSectionClassObject
 from AutoGen.GenDepex import DependencyExpression
diff --git a/BaseTools/Source/Python/GenFds/EfiSection.py b/BaseTools/Source/Python/GenFds/EfiSection.py
index d24df30cb734..7bce56ed55db 100644
--- a/BaseTools/Source/Python/GenFds/EfiSection.py
+++ b/BaseTools/Source/Python/GenFds/EfiSection.py
@@ -15,11 +15,12 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from struct import *
-import Section
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from . import Section
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 import subprocess
-from Ffs import Ffs
+from .Ffs import Ffs
 import Common.LongFilePathOs as os
 from CommonDataClass.FdfClass import EfiSectionClassObject
 from Common import EdkLogger
diff --git a/BaseTools/Source/Python/GenFds/Fd.py b/BaseTools/Source/Python/GenFds/Fd.py
index acd73f6449f6..86a0d9a47bfc 100644
--- a/BaseTools/Source/Python/GenFds/Fd.py
+++ b/BaseTools/Source/Python/GenFds/Fd.py
@@ -15,18 +15,18 @@
 ##
 # Import Modules
 #
-import Region
-import Fv
+from __future__ import absolute_import
+from . import Region
+from . import Fv
 import Common.LongFilePathOs as os
 from io import BytesIO
 import sys
 from struct import *
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from CommonDataClass.FdfClass import FDClassObject
 from Common import EdkLogger
 from Common.BuildToolError import *
 from Common.Misc import SaveFileOnChange
-from GenFds import GenFds
 
 ## generate FD
 #
@@ -46,6 +46,7 @@ class FD(FDClassObject):
     #   @retval string      Generated FD file name
     #
     def GenFd (self, Flag = False):
+        from .GenFds import GenFds
         if self.FdUiName.upper() + 'fd' in GenFds.ImageBinDict.keys():
             return GenFds.ImageBinDict[self.FdUiName.upper() + 'fd']
 
diff --git a/BaseTools/Source/Python/GenFds/FdfParser.py b/BaseTools/Source/Python/GenFds/FdfParser.py
index 43f849b07172..4e07d04c08df 100644
--- a/BaseTools/Source/Python/GenFds/FdfParser.py
+++ b/BaseTools/Source/Python/GenFds/FdfParser.py
@@ -17,34 +17,35 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 import re
 
-import Fd
-import Region
-import Fv
-import AprioriSection
-import FfsInfStatement
-import FfsFileStatement
-import VerSection
-import UiSection
-import FvImageSection
-import DataSection
-import DepexSection
-import CompressSection
-import GuidSection
-import Capsule
-import CapsuleData
-import Rule
-import RuleComplexFile
-import RuleSimpleFile
-import EfiSection
-import Vtf
-import ComponentStatement
-import OptionRom
-import OptRomInfStatement
-import OptRomFileStatement
+from . import Fd
+from . import Region
+from . import Fv
+from . import AprioriSection
+from . import FfsInfStatement
+from . import FfsFileStatement
+from . import VerSection
+from . import UiSection
+from . import FvImageSection
+from . import DataSection
+from . import DepexSection
+from . import CompressSection
+from . import GuidSection
+from . import Capsule
+from . import CapsuleData
+from . import Rule
+from . import RuleComplexFile
+from . import RuleSimpleFile
+from . import EfiSection
+from . import Vtf
+from . import ComponentStatement
+from . import OptionRom
+from . import OptRomInfStatement
+from . import OptRomFileStatement
 
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from Common.BuildToolError import *
 from Common import EdkLogger
 from Common.Misc import PathClass
@@ -58,8 +59,8 @@ from Common.Misc import tdict
 from Common.MultipleWorkspace import MultipleWorkspace as mws
 import Common.LongFilePathOs as os
 from Common.LongFilePathSupport import OpenLongFilePath as open
-from Capsule import EFI_CERT_TYPE_PKCS7_GUID
-from Capsule import EFI_CERT_TYPE_RSA2048_SHA256_GUID
+from .Capsule import EFI_CERT_TYPE_PKCS7_GUID
+from .Capsule import EFI_CERT_TYPE_RSA2048_SHA256_GUID
 
 ##define T_CHAR_SPACE                ' '
 ##define T_CHAR_NULL                 '\0'
diff --git a/BaseTools/Source/Python/GenFds/FfsFileStatement.py b/BaseTools/Source/Python/GenFds/FfsFileStatement.py
index 1293c8a107f0..1b9b4deef9ae 100644
--- a/BaseTools/Source/Python/GenFds/FfsFileStatement.py
+++ b/BaseTools/Source/Python/GenFds/FfsFileStatement.py
@@ -15,20 +15,21 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
-import Ffs
-import Rule
+from . import Ffs
+from . import Rule
 import Common.LongFilePathOs as os
 from io import BytesIO
 import subprocess
 
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from CommonDataClass.FdfClass import FileStatementClassObject
 from Common import EdkLogger
 from Common.BuildToolError import *
 from Common.Misc import GuidStructureByteArrayToGuidString
-from GuidSection import GuidSection
-from FvImageSection import FvImageSection
+from .GuidSection import GuidSection
+from .FvImageSection import FvImageSection
 from Common.Misc import SaveFileOnChange
 from struct import *
 
diff --git a/BaseTools/Source/Python/GenFds/FfsInfStatement.py b/BaseTools/Source/Python/GenFds/FfsInfStatement.py
index d6edd1f0971e..d1f3604a7fc9 100644
--- a/BaseTools/Source/Python/GenFds/FfsInfStatement.py
+++ b/BaseTools/Source/Python/GenFds/FfsInfStatement.py
@@ -16,17 +16,18 @@
 ##
 # Import Modules
 #
-import Rule
+from __future__ import absolute_import
+from . import Rule
 import Common.LongFilePathOs as os
 from io import BytesIO
 from struct import *
-from GenFdsGlobalVariable import GenFdsGlobalVariable
-import Ffs
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
+from . import Ffs
 import subprocess
 import sys
-import Section
-import RuleSimpleFile
-import RuleComplexFile
+from . import Section
+from . import RuleSimpleFile
+from . import RuleComplexFile
 from CommonDataClass.FdfClass import FfsInfStatementClassObject
 from Common.MultipleWorkspace import MultipleWorkspace as mws
 from Common.String import *
@@ -36,15 +37,15 @@ from Common.Misc import ProcessDuplicatedInf
 from Common.Misc import GetVariableOffset
 from Common import EdkLogger
 from Common.BuildToolError import *
-from GuidSection import GuidSection
-from FvImageSection import FvImageSection
+from .GuidSection import GuidSection
+from .FvImageSection import FvImageSection
 from Common.Misc import PeImageClass
 from AutoGen.GenDepex import DependencyExpression
 from PatchPcdValue.PatchPcdValue import PatchBinaryFile
 from Common.LongFilePathSupport import CopyLongFilePath
 from Common.LongFilePathSupport import OpenLongFilePath as open
 import Common.GlobalData as GlobalData
-from DepexSection import DepexSection
+from .DepexSection import DepexSection
 from Common.Misc import SaveFileOnChange
 
 ## generate FFS from INF
diff --git a/BaseTools/Source/Python/GenFds/Fv.py b/BaseTools/Source/Python/GenFds/Fv.py
index 88a520998eae..bff661e43e7e 100644
--- a/BaseTools/Source/Python/GenFds/Fv.py
+++ b/BaseTools/Source/Python/GenFds/Fv.py
@@ -15,17 +15,17 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
 import subprocess
 from io import BytesIO
 from struct import *
 
-import Ffs
-import AprioriSection
-import FfsFileStatement
-from GenFdsGlobalVariable import GenFdsGlobalVariable
-from GenFds import GenFds
+from . import Ffs
+from . import AprioriSection
+from . import FfsFileStatement
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from CommonDataClass.FdfClass import FvClassObject
 from Common.Misc import SaveFileOnChange
 from Common.LongFilePathSupport import CopyLongFilePath
@@ -70,7 +70,7 @@ class FV (FvClassObject):
     #   @retval string      Generated FV file path
     #
     def AddToBuffer (self, Buffer, BaseAddress=None, BlockSize= None, BlockNum=None, ErasePloarity='1', VtfDict=None, MacroDict = {}, Flag=False) :
-
+        from .GenFds import GenFds
         if BaseAddress == None and self.UiFvName.upper() + 'fv' in GenFds.ImageBinDict.keys():
             return GenFds.ImageBinDict[self.UiFvName.upper() + 'fv']
         
diff --git a/BaseTools/Source/Python/GenFds/FvImageSection.py b/BaseTools/Source/Python/GenFds/FvImageSection.py
index 7416ce1b7d8a..2352e8962e94 100644
--- a/BaseTools/Source/Python/GenFds/FvImageSection.py
+++ b/BaseTools/Source/Python/GenFds/FvImageSection.py
@@ -15,11 +15,12 @@
 ##
 # Import Modules
 #
-import Section
+from __future__ import absolute_import
+from . import Section
 from io import BytesIO
-from Ffs import Ffs
+from .Ffs import Ffs
 import subprocess
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 import Common.LongFilePathOs as os
 from CommonDataClass.FdfClass import FvImageSectionClassObject
 from Common import EdkLogger
diff --git a/BaseTools/Source/Python/GenFds/GenFds.py b/BaseTools/Source/Python/GenFds/GenFds.py
index ebebcd7980e4..7c1df37778fb 100644
--- a/BaseTools/Source/Python/GenFds/GenFds.py
+++ b/BaseTools/Source/Python/GenFds/GenFds.py
@@ -16,19 +16,20 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 from builtins import range
 from optparse import OptionParser
 import sys
 import Common.LongFilePathOs as os
 import linecache
-import FdfParser
+from . import FdfParser
 import Common.BuildToolError as BuildToolError
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from Workspace.WorkspaceDatabase import WorkspaceDatabase
 from Workspace.BuildClassObject import PcdClassObject
 from Workspace.BuildClassObject import ModuleBuildClassObject
-import RuleComplexFile
-from EfiSection import EfiSection
+from . import RuleComplexFile
+from .EfiSection import EfiSection
 from io import BytesIO
 import Common.TargetTxtClassObject as TargetTxtClassObject
 import Common.ToolDefClassObject as ToolDefClassObject
@@ -44,7 +45,7 @@ from Common.Misc import CheckPcdDatum
 from Common.Misc import BuildOptionPcdValueFormat
 from Common.BuildVersion import gBUILD_VERSION
 from Common.MultipleWorkspace import MultipleWorkspace as mws
-import FfsFileStatement
+from . import FfsFileStatement
 import glob
 from struct import unpack
 
diff --git a/BaseTools/Source/Python/GenFds/GuidSection.py b/BaseTools/Source/Python/GenFds/GuidSection.py
index ea737bb9a7ea..877dabc196e1 100644
--- a/BaseTools/Source/Python/GenFds/GuidSection.py
+++ b/BaseTools/Source/Python/GenFds/GuidSection.py
@@ -15,19 +15,19 @@
 ##
 # Import Modules
 #
-import Section
+from __future__ import absolute_import
+from . import Section
 import subprocess
-from Ffs import Ffs
+from .Ffs import Ffs
 import Common.LongFilePathOs as os
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from CommonDataClass.FdfClass import GuidSectionClassObject
 from Common import ToolDefClassObject
 import sys
 from Common import EdkLogger
 from Common.BuildToolError import *
-from FvImageSection import FvImageSection
+from .FvImageSection import FvImageSection
 from Common.LongFilePathSupport import OpenLongFilePath as open
-from GenFds import FindExtendTool
 
 ## generate GUIDed section
 #
@@ -129,6 +129,7 @@ class GuidSection(GuidSectionClassObject) :
         ExternalTool = None
         ExternalOption = None
         if self.NameGuid != None:
+            from .GenFds import FindExtendTool
             ExternalTool, ExternalOption = FindExtendTool(self.KeyStringList, self.CurrentArchList, self.NameGuid)
 
         #
diff --git a/BaseTools/Source/Python/GenFds/OptRomFileStatement.py b/BaseTools/Source/Python/GenFds/OptRomFileStatement.py
index ab4fae611e33..f33d6606ca96 100644
--- a/BaseTools/Source/Python/GenFds/OptRomFileStatement.py
+++ b/BaseTools/Source/Python/GenFds/OptRomFileStatement.py
@@ -15,9 +15,10 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.LongFilePathOs as os
 
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 ## 
 #
 #
diff --git a/BaseTools/Source/Python/GenFds/OptRomInfStatement.py b/BaseTools/Source/Python/GenFds/OptRomInfStatement.py
index 80c4bbab6eff..5de0cac2a374 100644
--- a/BaseTools/Source/Python/GenFds/OptRomInfStatement.py
+++ b/BaseTools/Source/Python/GenFds/OptRomInfStatement.py
@@ -15,16 +15,16 @@
 ##
 # Import Modules
 #
-import RuleSimpleFile
-import RuleComplexFile
-import Section
-import OptionRom
+from __future__ import absolute_import
+from . import RuleSimpleFile
+from . import RuleComplexFile
+from . import Section
 import Common.GlobalData as GlobalData
 
 from Common.DataType import *
 from Common.String import *
-from FfsInfStatement import FfsInfStatement
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .FfsInfStatement import FfsInfStatement
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 
 ## 
 #
@@ -45,7 +45,7 @@ class OptRomInfStatement (FfsInfStatement):
     #   @param  self        The object pointer
     #
     def __GetOptRomParams(self):
-        
+        from . import OptionRom
         if self.OverrideAttribs == None:
             self.OverrideAttribs = OptionRom.OverrideAttribs()
 
@@ -151,5 +151,3 @@ class OptRomInfStatement (FfsInfStatement):
                     OutputFileList.extend(FileList)    
         
         return OutputFileList
-
-    
\ No newline at end of file
diff --git a/BaseTools/Source/Python/GenFds/OptionRom.py b/BaseTools/Source/Python/GenFds/OptionRom.py
index 946cdf812a24..a7a63e80845c 100644
--- a/BaseTools/Source/Python/GenFds/OptionRom.py
+++ b/BaseTools/Source/Python/GenFds/OptionRom.py
@@ -15,12 +15,12 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.LongFilePathOs as os
 import subprocess
 
-import OptRomInfStatement
-from GenFdsGlobalVariable import GenFdsGlobalVariable
-from GenFds import GenFds
+from . import OptRomInfStatement
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from CommonDataClass.FdfClass import OptionRomClassObject
 from Common.Misc import SaveFileOnChange
 from Common import EdkLogger
diff --git a/BaseTools/Source/Python/GenFds/Region.py b/BaseTools/Source/Python/GenFds/Region.py
index 6ace73abe904..0debd579bec5 100644
--- a/BaseTools/Source/Python/GenFds/Region.py
+++ b/BaseTools/Source/Python/GenFds/Region.py
@@ -15,9 +15,10 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from builtins import range
 from struct import *
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from io import BytesIO
 import string
 from CommonDataClass.FdfClass import RegionClassObject
diff --git a/BaseTools/Source/Python/GenFds/RuleComplexFile.py b/BaseTools/Source/Python/GenFds/RuleComplexFile.py
index 36c483fbb207..c357fedbd3be 100644
--- a/BaseTools/Source/Python/GenFds/RuleComplexFile.py
+++ b/BaseTools/Source/Python/GenFds/RuleComplexFile.py
@@ -15,7 +15,8 @@
 ##
 # Import Modules
 #
-import Rule
+from __future__ import absolute_import
+from . import Rule
 from  CommonDataClass.FdfClass import RuleComplexFileClassObject
 
 ## complex rule
diff --git a/BaseTools/Source/Python/GenFds/RuleSimpleFile.py b/BaseTools/Source/Python/GenFds/RuleSimpleFile.py
index 061f984e6af4..7aa184e7d8bb 100644
--- a/BaseTools/Source/Python/GenFds/RuleSimpleFile.py
+++ b/BaseTools/Source/Python/GenFds/RuleSimpleFile.py
@@ -15,7 +15,8 @@
 ##
 # Import Modules
 #
-import Rule
+from __future__ import absolute_import
+from . import Rule
 from CommonDataClass.FdfClass import RuleSimpleFileClassObject
 
 ## simple rule
diff --git a/BaseTools/Source/Python/GenFds/Section.py b/BaseTools/Source/Python/GenFds/Section.py
index 463faa378165..4650afe27114 100644
--- a/BaseTools/Source/Python/GenFds/Section.py
+++ b/BaseTools/Source/Python/GenFds/Section.py
@@ -15,8 +15,9 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 from CommonDataClass.FdfClass import SectionClassObject
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 import Common.LongFilePathOs as os, glob
 from Common import EdkLogger
 from Common.BuildToolError import *
diff --git a/BaseTools/Source/Python/GenFds/UiSection.py b/BaseTools/Source/Python/GenFds/UiSection.py
index 4f6926f7cae4..a92bebc65cf8 100644
--- a/BaseTools/Source/Python/GenFds/UiSection.py
+++ b/BaseTools/Source/Python/GenFds/UiSection.py
@@ -15,11 +15,12 @@
 ##
 # Import Modules
 #
-import Section
-from Ffs import Ffs
+from __future__ import absolute_import
+from . import Section
+from .Ffs import Ffs
 import subprocess
 import Common.LongFilePathOs as os
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from CommonDataClass.FdfClass import UiSectionClassObject
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
diff --git a/BaseTools/Source/Python/GenFds/VerSection.py b/BaseTools/Source/Python/GenFds/VerSection.py
index e29029980fad..c8186fe7477e 100644
--- a/BaseTools/Source/Python/GenFds/VerSection.py
+++ b/BaseTools/Source/Python/GenFds/VerSection.py
@@ -15,11 +15,12 @@
 ##
 # Import Modules
 #
-from Ffs import Ffs
-import Section
+from __future__ import absolute_import
+from .Ffs import Ffs
+from . import Section
 import Common.LongFilePathOs as os
 import subprocess
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 from CommonDataClass.FdfClass import VerSectionClassObject
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
diff --git a/BaseTools/Source/Python/GenFds/Vtf.py b/BaseTools/Source/Python/GenFds/Vtf.py
index 06e3d275c381..a0898b2f639b 100644
--- a/BaseTools/Source/Python/GenFds/Vtf.py
+++ b/BaseTools/Source/Python/GenFds/Vtf.py
@@ -15,7 +15,8 @@
 ##
 # Import Modules
 #
-from GenFdsGlobalVariable import GenFdsGlobalVariable
+from __future__ import absolute_import
+from .GenFdsGlobalVariable import GenFdsGlobalVariable
 import Common.LongFilePathOs as os
 from CommonDataClass.FdfClass import VtfClassObject
 from Common.LongFilePathSupport import OpenLongFilePath as open
diff --git a/BaseTools/Source/Python/Table/TableDataModel.py b/BaseTools/Source/Python/Table/TableDataModel.py
index 9c3d7bd9345f..74df04a8200a 100644
--- a/BaseTools/Source/Python/Table/TableDataModel.py
+++ b/BaseTools/Source/Python/Table/TableDataModel.py
@@ -14,9 +14,10 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.EdkLogger as EdkLogger
 import CommonDataClass.DataClass as DataClass
-from Table import Table
+from .Table import Table
 from Common.String import ConvertToSqlString
 
 ## TableDataModel
diff --git a/BaseTools/Source/Python/Table/TableDec.py b/BaseTools/Source/Python/Table/TableDec.py
index 6b7d22c9384c..b33230f437b6 100644
--- a/BaseTools/Source/Python/Table/TableDec.py
+++ b/BaseTools/Source/Python/Table/TableDec.py
@@ -14,9 +14,10 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.EdkLogger as EdkLogger
 import CommonDataClass.DataClass as DataClass
-from Table import Table
+from .Table import Table
 from Common.String import ConvertToSqlString
 
 ## TableDec
diff --git a/BaseTools/Source/Python/Table/TableDsc.py b/BaseTools/Source/Python/Table/TableDsc.py
index 69477d544d8e..c8d6e4b3dc15 100644
--- a/BaseTools/Source/Python/Table/TableDsc.py
+++ b/BaseTools/Source/Python/Table/TableDsc.py
@@ -14,9 +14,10 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.EdkLogger as EdkLogger
 import CommonDataClass.DataClass as DataClass
-from Table import Table
+from .Table import Table
 from Common.String import ConvertToSqlString
 
 ## TableDsc
diff --git a/BaseTools/Source/Python/Table/TableEotReport.py b/BaseTools/Source/Python/Table/TableEotReport.py
index 740105c8f99d..a32779524fff 100644
--- a/BaseTools/Source/Python/Table/TableEotReport.py
+++ b/BaseTools/Source/Python/Table/TableEotReport.py
@@ -14,9 +14,10 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.EdkLogger as EdkLogger
 import Common.LongFilePathOs as os, time
-from Table import Table
+from .Table import Table
 from Common.String import ConvertToSqlString2
 import Eot.EotToolError as EotToolError
 import Eot.EotGlobalData as EotGlobalData
@@ -73,4 +74,4 @@ class TableEotReport(Table):
         SqlCommand = """select max(ID) from %s""" % self.Table
         self.Cur.execute(SqlCommand)
         for Item in self.Cur:
-            return Item[0]
\ No newline at end of file
+            return Item[0]
diff --git a/BaseTools/Source/Python/Table/TableFdf.py b/BaseTools/Source/Python/Table/TableFdf.py
index 927b5d1a3be6..b15c5c21201c 100644
--- a/BaseTools/Source/Python/Table/TableFdf.py
+++ b/BaseTools/Source/Python/Table/TableFdf.py
@@ -14,9 +14,10 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.EdkLogger as EdkLogger
 import CommonDataClass.DataClass as DataClass
-from Table import Table
+from .Table import Table
 from Common.String import ConvertToSqlString
 
 ## TableFdf
diff --git a/BaseTools/Source/Python/Table/TableFile.py b/BaseTools/Source/Python/Table/TableFile.py
index caf749e9d3c5..57e1fc0bcece 100644
--- a/BaseTools/Source/Python/Table/TableFile.py
+++ b/BaseTools/Source/Python/Table/TableFile.py
@@ -14,8 +14,9 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.EdkLogger as EdkLogger
-from Table import Table
+from .Table import Table
 from Common.String import ConvertToSqlString
 import Common.LongFilePathOs as os
 from CommonDataClass.DataClass import FileClass
diff --git a/BaseTools/Source/Python/Table/TableFunction.py b/BaseTools/Source/Python/Table/TableFunction.py
index 3d7c2d0ea5a0..97f360cec59e 100644
--- a/BaseTools/Source/Python/Table/TableFunction.py
+++ b/BaseTools/Source/Python/Table/TableFunction.py
@@ -14,8 +14,9 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.EdkLogger as EdkLogger
-from Table import Table
+from .Table import Table
 from Common.String import ConvertToSqlString
 
 ## TableFunction
diff --git a/BaseTools/Source/Python/Table/TableIdentifier.py b/BaseTools/Source/Python/Table/TableIdentifier.py
index bcd6d6e1c152..b7b4d9018c0e 100644
--- a/BaseTools/Source/Python/Table/TableIdentifier.py
+++ b/BaseTools/Source/Python/Table/TableIdentifier.py
@@ -14,9 +14,10 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.EdkLogger as EdkLogger
 from Common.String import ConvertToSqlString
-from Table import Table
+from .Table import Table
 
 ## TableIdentifier
 #
@@ -87,4 +88,4 @@ class TableIdentifier(Table):
                                            % (self.Table, self.ID, Modifier, Type, Name, Value, Model, BelongsToFile, BelongsToFunction, StartLine, StartColumn, EndLine, EndColumn)
         Table.Insert(self, SqlCommand)
 
-        return self.ID
\ No newline at end of file
+        return self.ID
diff --git a/BaseTools/Source/Python/Table/TableInf.py b/BaseTools/Source/Python/Table/TableInf.py
index b6e300b150c1..424c2663ca0f 100644
--- a/BaseTools/Source/Python/Table/TableInf.py
+++ b/BaseTools/Source/Python/Table/TableInf.py
@@ -14,9 +14,10 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.EdkLogger as EdkLogger
 import CommonDataClass.DataClass as DataClass
-from Table import Table
+from .Table import Table
 from Common.String import ConvertToSqlString
 
 ## TableInf
diff --git a/BaseTools/Source/Python/Table/TablePcd.py b/BaseTools/Source/Python/Table/TablePcd.py
index 19623f98f42c..01011062cee4 100644
--- a/BaseTools/Source/Python/Table/TablePcd.py
+++ b/BaseTools/Source/Python/Table/TablePcd.py
@@ -14,8 +14,9 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.EdkLogger as EdkLogger
-from Table import Table
+from .Table import Table
 from Common.String import ConvertToSqlString
 
 ## TablePcd
@@ -87,4 +88,4 @@ class TablePcd(Table):
                                            % (self.Table, self.ID, CName, TokenSpaceGuidCName, Token, DatumType, Model, BelongsToFile, BelongsToFunction, StartLine, StartColumn, EndLine, EndColumn)
         Table.Insert(self, SqlCommand)
 
-        return self.ID
\ No newline at end of file
+        return self.ID
diff --git a/BaseTools/Source/Python/Table/TableQuery.py b/BaseTools/Source/Python/Table/TableQuery.py
index e1d2537394b2..205602d05d6c 100644
--- a/BaseTools/Source/Python/Table/TableQuery.py
+++ b/BaseTools/Source/Python/Table/TableQuery.py
@@ -14,9 +14,10 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.EdkLogger as EdkLogger
 from Common.String import ConvertToSqlString
-from Table import Table
+from .Table import Table
 
 ## TableQuery
 #
diff --git a/BaseTools/Source/Python/Table/TableReport.py b/BaseTools/Source/Python/Table/TableReport.py
index 4af0e98d86b4..40afa15c08c5 100644
--- a/BaseTools/Source/Python/Table/TableReport.py
+++ b/BaseTools/Source/Python/Table/TableReport.py
@@ -14,9 +14,10 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import Common.EdkLogger as EdkLogger
 import Common.LongFilePathOs as os, time
-from Table import Table
+from .Table import Table
 from Common.String import ConvertToSqlString2
 import EccToolError as EccToolError
 import EccGlobalData as EccGlobalData
diff --git a/BaseTools/Source/Python/UPT/Library/Parsing.py b/BaseTools/Source/Python/UPT/Library/Parsing.py
index bac664506f4d..dbbfff9e9462 100644
--- a/BaseTools/Source/Python/UPT/Library/Parsing.py
+++ b/BaseTools/Source/Python/UPT/Library/Parsing.py
@@ -16,6 +16,7 @@
 '''
 Parsing
 '''
+from __future__ import absolute_import
 
 ##
 # Import Modules
@@ -43,7 +44,7 @@ from Logger import StringTable as ST
 import Logger.Log as Logger
 
 from Parser.DecParser import Dec
-import GlobalData
+from . import GlobalData
 
 gPKG_INFO_DICT = {}
 
diff --git a/BaseTools/Source/Python/Workspace/DscBuildData.py b/BaseTools/Source/Python/Workspace/DscBuildData.py
index 8551a0d8b7e7..4b1c8a257db6 100644
--- a/BaseTools/Source/Python/Workspace/DscBuildData.py
+++ b/BaseTools/Source/Python/Workspace/DscBuildData.py
@@ -18,6 +18,7 @@
 # into PlatformBuildClassObject form for easier use for AutoGen.
 #
 from __future__ import print_function
+from __future__ import absolute_import
 from builtins import range
 from Common.String import *
 from Common.DataType import *
@@ -27,11 +28,11 @@ from types import *
 from CommonDataClass.CommonClass import SkuInfoClass
 from Common.TargetTxtClassObject import *
 from Common.ToolDefClassObject import *
-from MetaDataTable import *
-from MetaFileTable import *
-from MetaFileParser import *
+from .MetaDataTable import *
+from .MetaFileTable import *
+from .MetaFileParser import *
 
-from WorkspaceCommon import GetDeclaredPcd
+from .WorkspaceCommon import GetDeclaredPcd
 from Common.Misc import AnalyzeDscPcd
 from Common.Misc import ProcessDuplicatedInf
 import re
diff --git a/BaseTools/Source/Python/Workspace/InfBuildData.py b/BaseTools/Source/Python/Workspace/InfBuildData.py
index 9fc2e681b73d..85b5fefe26dd 100644
--- a/BaseTools/Source/Python/Workspace/InfBuildData.py
+++ b/BaseTools/Source/Python/Workspace/InfBuildData.py
@@ -12,12 +12,13 @@
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 
+from __future__ import absolute_import
 from builtins import range
 from Common.String import *
 from Common.DataType import *
 from Common.Misc import *
 from types import *
-from MetaFileParser import *
+from .MetaFileParser import *
 
 from Workspace.BuildClassObject import ModuleBuildClassObject, LibraryClassObject, PcdClassObject
 ## Module build information from INF file
diff --git a/BaseTools/Source/Python/Workspace/MetaFileParser.py b/BaseTools/Source/Python/Workspace/MetaFileParser.py
index b96d027cb19e..f871ab717c4b 100644
--- a/BaseTools/Source/Python/Workspace/MetaFileParser.py
+++ b/BaseTools/Source/Python/Workspace/MetaFileParser.py
@@ -16,6 +16,7 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 from builtins import range
 import Common.LongFilePathOs as os
 import re
@@ -34,8 +35,8 @@ from Common.Expression import *
 from CommonDataClass.Exceptions import *
 from Common.LongFilePathSupport import OpenLongFilePath as open
 
-from MetaFileTable import MetaFileStorage
-from MetaFileCommentParser import CheckInfComment
+from .MetaFileTable import MetaFileStorage
+from .MetaFileCommentParser import CheckInfComment
 
 ## A decorator used to parse macro definition
 def ParseMacro(Parser):
diff --git a/BaseTools/Source/Python/Workspace/MetaFileTable.py b/BaseTools/Source/Python/Workspace/MetaFileTable.py
index 9416065b284f..6cf4c023e246 100644
--- a/BaseTools/Source/Python/Workspace/MetaFileTable.py
+++ b/BaseTools/Source/Python/Workspace/MetaFileTable.py
@@ -14,13 +14,14 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import uuid
 
 import Common.EdkLogger as EdkLogger
 from Common.BuildToolError import FORMAT_INVALID
 
-from MetaDataTable import Table, TableFile
-from MetaDataTable import ConvertToSqlString
+from .MetaDataTable import Table, TableFile
+from .MetaDataTable import ConvertToSqlString
 from CommonDataClass.DataClass import MODEL_FILE_DSC, MODEL_FILE_DEC, MODEL_FILE_INF, \
                                       MODEL_FILE_OTHERS
 from Common.DataType import *
diff --git a/BaseTools/Source/Python/Workspace/WorkspaceCommon.py b/BaseTools/Source/Python/Workspace/WorkspaceCommon.py
index 6b5e0edb0a4d..fd7a3617668c 100644
--- a/BaseTools/Source/Python/Workspace/WorkspaceCommon.py
+++ b/BaseTools/Source/Python/Workspace/WorkspaceCommon.py
@@ -11,9 +11,10 @@
 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 
+from __future__ import absolute_import
 from Common.Misc import sdict
 from Common.DataType import SUP_MODULE_USER_DEFINED
-from BuildClassObject import LibraryClassObject
+from .BuildClassObject import LibraryClassObject
 import Common.GlobalData as GlobalData
 from Workspace.BuildClassObject import StructurePcd
 
diff --git a/BaseTools/Source/Python/Workspace/WorkspaceDatabase.py b/BaseTools/Source/Python/Workspace/WorkspaceDatabase.py
index a3407d113e0f..052d8739bccb 100644
--- a/BaseTools/Source/Python/Workspace/WorkspaceDatabase.py
+++ b/BaseTools/Source/Python/Workspace/WorkspaceDatabase.py
@@ -15,15 +15,16 @@
 ##
 # Import Modules
 #
+from __future__ import absolute_import
 import sqlite3
 from Common.String import *
 from Common.DataType import *
 from Common.Misc import *
 from types import *
 
-from MetaDataTable import *
-from MetaFileTable import *
-from MetaFileParser import *
+from .MetaDataTable import *
+from .MetaFileTable import *
+from .MetaFileParser import *
 
 from Workspace.DecBuildData import DecBuildData
 from Workspace.DscBuildData import DscBuildData
diff --git a/BaseTools/Source/Python/build/build.py b/BaseTools/Source/Python/build/build.py
index 66b46fab5c26..22feae2964cf 100644
--- a/BaseTools/Source/Python/build/build.py
+++ b/BaseTools/Source/Python/build/build.py
@@ -17,6 +17,7 @@
 # Import Modules
 #
 from __future__ import print_function
+from __future__ import absolute_import
 import Common.LongFilePathOs as os
 import re
 from io import BytesIO
@@ -46,7 +47,7 @@ from Common.BuildToolError import *
 from Workspace.WorkspaceDatabase import *
 from Common.MultipleWorkspace import MultipleWorkspace as mws
 
-from BuildReport import BuildReport
+from .BuildReport import BuildReport
 from GenPatchPcdTable.GenPatchPcdTable import *
 from PatchPcdValue.PatchPcdValue import *
 
-- 
2.16.1

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