Reviewed-by: Yonghong Zhu <yonghong....@intel.com> 

Best Regards,
Zhu Yonghong


-----Original Message-----
From: Carsey, Jaben 
Sent: Tuesday, April 17, 2018 10:40 PM
To: edk2-devel@lists.01.org
Cc: Gao, Liming <liming....@intel.com>; Zhu, Yonghong <yonghong....@intel.com>
Subject: [PATCH v3 2/2] BaseTools: refactor and remove un-needed use of .keys() 
on dictionaries

From: Jaben <jaben.car...@intel.com>

sometimes just delete it.
sometimes the loop needed .values() instead

v2 was my error
v3 fix error per Yonghong's review.

Cc: Liming Gao <liming....@intel.com>
Cc: Yonghong Zhu <yonghong....@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jaben Carsey <jaben.car...@intel.com>
---
 BaseTools/Source/Python/AutoGen/AutoGen.py             | 32 +++++-----
 BaseTools/Source/Python/AutoGen/GenMake.py             | 24 ++++----
 BaseTools/Source/Python/AutoGen/GenVar.py              |  2 +-
 BaseTools/Source/Python/AutoGen/InfSectionParser.py    |  6 +-
 BaseTools/Source/Python/BPDG/GenVpd.py                 |  2 +-
 BaseTools/Source/Python/Common/EdkIIWorkspace.py       |  5 +-
 BaseTools/Source/Python/Common/Expression.py           |  4 +-
 BaseTools/Source/Python/Common/Misc.py                 |  2 +-
 BaseTools/Source/Python/Common/Parsing.py              | 13 ++---
 BaseTools/Source/Python/Common/String.py               |  2 +-
 BaseTools/Source/Python/Common/VpdInfoFile.py          |  8 +--
 BaseTools/Source/Python/GenFds/Capsule.py              |  8 +--
 BaseTools/Source/Python/GenFds/CapsuleData.py          | 10 ++--
 BaseTools/Source/Python/GenFds/Fd.py                   |  4 +-
 BaseTools/Source/Python/GenFds/FdfParser.py            | 18 +++---
 BaseTools/Source/Python/GenFds/FfsFileStatement.py     |  6 +-
 BaseTools/Source/Python/GenFds/FfsInfStatement.py      |  2 +-
 BaseTools/Source/Python/GenFds/Fv.py                   | 14 ++---
 BaseTools/Source/Python/GenFds/GenFds.py               | 61 
+++++++++-----------
 BaseTools/Source/Python/GenFds/GenFdsGlobalVariable.py |  4 +-
 BaseTools/Source/Python/GenFds/Region.py               | 12 ++--
 BaseTools/Source/Python/TargetTool/TargetTool.py       |  8 +--
 BaseTools/Source/Python/Workspace/DscBuildData.py      | 40 ++++++-------
 BaseTools/Source/Python/Workspace/InfBuildData.py      |  5 +-
 BaseTools/Source/Python/Workspace/MetaFileParser.py    |  4 +-
 BaseTools/Source/Python/Workspace/WorkspaceCommon.py   |  6 +-
 BaseTools/Source/Python/build/BuildReport.py           |  4 +-
 BaseTools/Source/Python/build/build.py                 | 22 ++++---
 28 files changed, 153 insertions(+), 175 deletions(-)

diff --git a/BaseTools/Source/Python/AutoGen/AutoGen.py 
b/BaseTools/Source/Python/AutoGen/AutoGen.py
index 2613c77a7a10..eab25d99d017 100644
--- a/BaseTools/Source/Python/AutoGen/AutoGen.py
+++ b/BaseTools/Source/Python/AutoGen/AutoGen.py
@@ -769,7 +769,7 @@ class WorkspaceAutoGen(AutoGen):
                         for Module in Pa.ModuleAutoGenList:
                             if path.normpath(Module.MetaFile.File) == 
path.normpath(FfsFile.InfFileName):
                                 InfFoundFlag = True
-                                if not Module.Guid.upper() in _GuidDict.keys():
+                                if Module.Guid.upper() not in _GuidDict:
                                     _GuidDict[Module.Guid.upper()] = FfsFile
                                     break
                                 else:
@@ -796,7 +796,7 @@ class WorkspaceAutoGen(AutoGen):
                             # BuildObject from one of AutoGenObjectList is 
enough.
                             #
                             InfObj = 
self.AutoGenObjectList[0].BuildDatabase.WorkspaceDb.BuildObject[PathClassObj, 
'COMMON', self.BuildTarget, self.ToolChain]
-                            if not InfObj.Guid.upper() in _GuidDict.keys():
+                            if InfObj.Guid.upper() not in _GuidDict:
                                 _GuidDict[InfObj.Guid.upper()] = FfsFile
                             else:
                                 EdkLogger.error("build",
@@ -844,7 +844,7 @@ class WorkspaceAutoGen(AutoGen):
                                                             "The format of PCD 
value is incorrect. PCD: %s , Value: %s\n" % (_PcdName, PcdItem.DefaultValue),
                                                             
ExtraData=self.FdfFile)
 
-                                        if not _PcdGuidString.upper() in 
_GuidDict.keys():
+                                        if _PcdGuidString.upper() not in 
_GuidDict:
                                             _GuidDict[_PcdGuidString.upper()] 
= FfsFile
                                             PcdFoundFlag = True
                                             break
@@ -858,7 +858,7 @@ class WorkspaceAutoGen(AutoGen):
                                                                                
                                                            
FfsFile.NameGuid.upper()),
                                                             
ExtraData=self.FdfFile)
 
-                    if not FfsFile.NameGuid.upper() in _GuidDict.keys():
+                    if FfsFile.NameGuid.upper() not in _GuidDict:
                         _GuidDict[FfsFile.NameGuid.upper()] = FfsFile
                     else:
                         #
@@ -1409,10 +1409,8 @@ class PlatformAutoGen(AutoGen):
                     PcdFromModule.IsFromBinaryInf = True
 
                 # Check the PCD from DSC or not 
-                if (PcdFromModule.TokenCName, 
PcdFromModule.TokenSpaceGuidCName) in self.Platform.Pcds.keys():
-                    PcdFromModule.IsFromDsc = True
-                else:
-                    PcdFromModule.IsFromDsc = False
+                PcdFromModule.IsFromDsc = (PcdFromModule.TokenCName, 
PcdFromModule.TokenSpaceGuidCName) in self.Platform.Pcds
+                
                 if PcdFromModule.Type in GenC.gDynamicPcd or 
PcdFromModule.Type in GenC.gDynamicExPcd:
                     if F.Path not in FdfModuleList:
                         # If one of the Source built modules listed in the DSC 
is not listed 
@@ -1542,8 +1540,8 @@ class PlatformAutoGen(AutoGen):
         VpdFile               = VpdInfoFile.VpdInfoFile()
         NeedProcessVpdMapFile = False
 
-        for pcd in self.Platform.Pcds.keys():
-            if pcd not in self._PlatformPcds.keys():
+        for pcd in self.Platform.Pcds:
+            if pcd not in self._PlatformPcds:
                 self._PlatformPcds[pcd] = self.Platform.Pcds[pcd]
 
         for item in self._PlatformPcds:
@@ -1553,7 +1551,7 @@ class PlatformAutoGen(AutoGen):
         if (self.Workspace.ArchList[-1] == self.Arch): 
             for Pcd in self._DynamicPcdList:
                 # just pick the a value to determine whether is unicode string 
type
-                Sku = Pcd.SkuInfoList[Pcd.SkuInfoList.keys()[0]]
+                Sku = Pcd.SkuInfoList.values()[0]
                 Sku.VpdOffset = Sku.VpdOffset.strip()
 
                 if Pcd.DatumType not in [TAB_UINT8, TAB_UINT16, TAB_UINT32, 
TAB_UINT64, TAB_VOID, "BOOLEAN"]:
@@ -1640,7 +1638,7 @@ class PlatformAutoGen(AutoGen):
                 if DscPcdEntry.Type in [TAB_PCDS_DYNAMIC_VPD, 
TAB_PCDS_DYNAMIC_EX_VPD]:
                     if not (self.Platform.VpdToolGuid is None or 
self.Platform.VpdToolGuid == ''):
                         FoundFlag = False
-                        for VpdPcd in VpdFile._VpdArray.keys():
+                        for VpdPcd in VpdFile._VpdArray:
                             # This PCD has been referenced by module
                             if (VpdPcd.TokenSpaceGuidCName == 
DscPcdEntry.TokenSpaceGuidCName) and \
                                (VpdPcd.TokenCName == DscPcdEntry.TokenCName):
@@ -1752,7 +1750,7 @@ class PlatformAutoGen(AutoGen):
             # Delete the DynamicPcdList At the last time enter into this 
function
             for Pcd in self._DynamicPcdList:
                 # just pick the a value to determine whether is unicode string 
type
-                Sku = Pcd.SkuInfoList[Pcd.SkuInfoList.keys()[0]]
+                Sku = Pcd.SkuInfoList.values()[0]
                 Sku.VpdOffset = Sku.VpdOffset.strip()
 
                 if Pcd.DatumType not in [TAB_UINT8, TAB_UINT16, TAB_UINT32, 
TAB_UINT64, TAB_VOID, "BOOLEAN"]:
@@ -2492,7 +2490,7 @@ class PlatformAutoGen(AutoGen):
             for LibraryName in M.Libraries:
                 Library = self.Platform.LibraryClasses[LibraryName, ':dummy:']
                 if Library is None:
-                    for Key in self.Platform.LibraryClasses.data.keys():
+                    for Key in self.Platform.LibraryClasses.data:
                         if LibraryName.upper() == Key.upper():
                             Library = self.Platform.LibraryClasses[Key, 
':dummy:']
                             break
@@ -3115,7 +3113,7 @@ class ModuleAutoGen(AutoGen):
             InfObj = InfSectionParser.InfSectionParser(Filename)
             DepexExpresionList = InfObj.GetDepexExpresionList()
             for DepexExpresion in DepexExpresionList:
-                for key in DepexExpresion.keys():
+                for key in DepexExpresion:
                     Arch, ModuleType = key
                     DepexExpr = [x for x in DepexExpresion[key] if not 
str(x).startswith('#')]
                     # the type of build module is USER_DEFINED.
@@ -3133,7 +3131,7 @@ class ModuleAutoGen(AutoGen):
         #the type of build module is USER_DEFINED.
         if self.ModuleType.upper() == SUP_MODULE_USER_DEFINED:
             for Depex in DepexList:
-                for key in Depex.keys():
+                for key in Depex:
                     DepexStr += '[Depex.%s.%s]\n' % key
                     DepexStr += '\n'.join(['# '+ val for val in Depex[key]])
                     DepexStr += '\n\n'
@@ -3243,7 +3241,7 @@ class ModuleAutoGen(AutoGen):
             InfObj = InfSectionParser.InfSectionParser(Filename)
             TianoCoreUserExtenList = InfObj.GetUserExtensionTianoCore()
             for TianoCoreUserExtent in TianoCoreUserExtenList:
-                for Section in TianoCoreUserExtent.keys():
+                for Section in TianoCoreUserExtent:
                     ItemList = Section.split(TAB_SPLIT)
                     Arch = self.Arch
                     if len(ItemList) == 4:
diff --git a/BaseTools/Source/Python/AutoGen/GenMake.py 
b/BaseTools/Source/Python/AutoGen/GenMake.py
index b7594d8988da..1bb5163e73e0 100644
--- a/BaseTools/Source/Python/AutoGen/GenMake.py
+++ b/BaseTools/Source/Python/AutoGen/GenMake.py
@@ -495,11 +495,11 @@ cleanlib:
             if k not in self._AutoGenObject.Macros:
                 self._AutoGenObject.Macros[k] = v
 
-        if 'MODULE_ENTRY_POINT' not in self._AutoGenObject.Macros.keys():
+        if 'MODULE_ENTRY_POINT' not in self._AutoGenObject.Macros:
             self._AutoGenObject.Macros['MODULE_ENTRY_POINT'] = ModuleEntryPoint
-        if 'ARCH_ENTRY_POINT' not in self._AutoGenObject.Macros.keys():
+        if 'ARCH_ENTRY_POINT' not in self._AutoGenObject.Macros:
             self._AutoGenObject.Macros['ARCH_ENTRY_POINT'] = ArchEntryPoint
-        if 'IMAGE_ENTRY_POINT' not in self._AutoGenObject.Macros.keys():
+        if 'IMAGE_ENTRY_POINT' not in self._AutoGenObject.Macros:
             self._AutoGenObject.Macros['IMAGE_ENTRY_POINT'] = ImageEntryPoint
 
         PCI_COMPRESS_Flag = False
@@ -540,7 +540,7 @@ cleanlib:
         RespFileList = os.path.join(self._AutoGenObject.OutputDir, 
'respfilelist.txt')
         if RespDict:
             RespFileListContent = ''
-            for Resp in RespDict.keys():
+            for Resp in RespDict:
                 RespFile = os.path.join(self._AutoGenObject.OutputDir, 
str(Resp).lower() + '.txt')
                 StrList = RespDict[Resp].split(' ')
                 UnexpandMacro = []
@@ -794,7 +794,7 @@ cleanlib:
                         SingleCommandLength = len(SingleCommand)
                         SingleCommandList = SingleCommand.split()
                         if len(SingleCommandList) > 0:
-                            for Flag in FlagDict.keys():
+                            for Flag in FlagDict:
                                 if '$('+ Flag +')' in SingleCommandList[0]:
                                     Tool = Flag
                                     break
@@ -807,12 +807,12 @@ cleanlib:
                                     if 'FLAGS' not in 
self._AutoGenObject._BuildOption[Tool]:
                                         EdkLogger.error("build", 
AUTOGEN_ERROR, "%s_FLAGS doesn't exist in %s ToolChain and %s Arch." %(Tool, 
self._AutoGenObject.ToolChain, self._AutoGenObject.Arch), ExtraData="[%s]" % 
str(self._AutoGenObject))
                                     Str = 
self._AutoGenObject._BuildOption[Tool]['FLAGS']
-                                    for Option in 
self._AutoGenObject.BuildOption.keys():
+                                    for Option in 
self._AutoGenObject.BuildOption:
                                         for Attr in 
self._AutoGenObject.BuildOption[Option]:
                                             if Str.find(Option + '_' + Attr) 
!= -1:
                                                 Str = Str.replace('$(' + 
Option + '_' + Attr + ')', self._AutoGenObject.BuildOption[Option][Attr])
                                     while(Str.find('$(') != -1):
-                                        for macro in 
self._AutoGenObject.Macros.keys():
+                                        for macro in 
self._AutoGenObject.Macros:
                                             MacroName = '$('+ macro + ')'
                                             if (Str.find(MacroName) != -1):
                                                 Str = Str.replace(MacroName, 
self._AutoGenObject.Macros[macro])
@@ -824,12 +824,12 @@ cleanlib:
                                     SingleCommandLength += 
self._AutoGenObject.IncludePathLength + len(IncPrefix) * 
len(self._AutoGenObject._IncludePathList)
                                 elif item.find('$(') != -1:
                                     Str = item
-                                    for Option in 
self._AutoGenObject.BuildOption.keys():
+                                    for Option in 
self._AutoGenObject.BuildOption:
                                         for Attr in 
self._AutoGenObject.BuildOption[Option]:
                                             if Str.find(Option + '_' + Attr) 
!= -1:
                                                 Str = Str.replace('$(' + 
Option + '_' + Attr + ')', self._AutoGenObject.BuildOption[Option][Attr])
                                     while(Str.find('$(') != -1):
-                                        for macro in 
self._AutoGenObject.Macros.keys():
+                                        for macro in 
self._AutoGenObject.Macros:
                                             MacroName = '$('+ macro + ')'
                                             if (Str.find(MacroName) != -1):
                                                 Str = Str.replace(MacroName, 
self._AutoGenObject.Macros[macro])
@@ -842,19 +842,19 @@ cleanlib:
                                 FlagDict[Tool]['Value'] = True
 
                 # generate the response file content by combine the FLAGS and 
INC
-                for Flag in FlagDict.keys():
+                for Flag in FlagDict:
                     if FlagDict[Flag]['Value']:
                         Key = Flag + '_RESP'
                         RespMacro = FlagDict[Flag]['Macro'].replace('FLAGS', 
'RESP')
                         Value = self._AutoGenObject.BuildOption[Flag]['FLAGS']
                         for inc in self._AutoGenObject._IncludePathList:
                             Value += ' ' + IncPrefix + inc
-                        for Option in self._AutoGenObject.BuildOption.keys():
+                        for Option in self._AutoGenObject.BuildOption:
                             for Attr in 
self._AutoGenObject.BuildOption[Option]:
                                 if Value.find(Option + '_' + Attr) != -1:
                                     Value = Value.replace('$(' + Option + '_' 
+ Attr + ')', self._AutoGenObject.BuildOption[Option][Attr])
                         while (Value.find('$(') != -1):
-                            for macro in self._AutoGenObject.Macros.keys():
+                            for macro in self._AutoGenObject.Macros:
                                 MacroName = '$('+ macro + ')'
                                 if (Value.find(MacroName) != -1):
                                     Value = Value.replace(MacroName, 
self._AutoGenObject.Macros[macro])
diff --git a/BaseTools/Source/Python/AutoGen/GenVar.py 
b/BaseTools/Source/Python/AutoGen/GenVar.py
index d222e6ed5e7e..5d5e8637b6bd 100644
--- a/BaseTools/Source/Python/AutoGen/GenVar.py
+++ b/BaseTools/Source/Python/AutoGen/GenVar.py
@@ -113,8 +113,8 @@ class VariableMgr(object):
         self.VarInfo = [item[0] for item in indexedvarinfo.values()]
 
     def assemble_variable(self, valuelist):
-        ordered_value = [valuelist[k] for k in sorted(valuelist.keys())]
         ordered_offset = sorted(valuelist.keys())
+        ordered_value = [valuelist[k] for k in ordered_offset]
         var_value = []
         num = 0
         for offset in ordered_offset:
diff --git a/BaseTools/Source/Python/AutoGen/InfSectionParser.py 
b/BaseTools/Source/Python/AutoGen/InfSectionParser.py
index cdc9e5e8a849..cf4e76159e81 100644
--- a/BaseTools/Source/Python/AutoGen/InfSectionParser.py
+++ b/BaseTools/Source/Python/AutoGen/InfSectionParser.py
@@ -1,7 +1,7 @@
 ## @file
 # Parser a Inf file and Get specify section data.
 #
-# Copyright (c) 2007 - 2012, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
 # This program and the accompanying materials
 # are licensed and made available under the terms and conditions of the BSD 
License
 # which accompanies this distribution.  The full text of the license may be 
found at
@@ -70,7 +70,7 @@ class InfSectionParser():
         if not self._FileSectionDataList:
             return UserExtensionTianoCore
         for SectionDataDict in self._FileSectionDataList:
-            for key in SectionDataDict.keys():
+            for key in SectionDataDict:
                 if key.lower().startswith("[userextensions") and 
key.lower().find('.tianocore.') > -1:
                     SectionLine = 
key.lstrip(TAB_SECTION_START).rstrip(TAB_SECTION_END)
                     SubSectionList = [SectionLine]
@@ -89,7 +89,7 @@ class InfSectionParser():
         if not self._FileSectionDataList:
             return DepexExpresionList
         for SectionDataDict in self._FileSectionDataList:
-            for key in SectionDataDict.keys():
+            for key in SectionDataDict:
                 if key.lower() == "[depex]" or 
key.lower().startswith("[depex."):
                     SectionLine = 
key.lstrip(TAB_SECTION_START).rstrip(TAB_SECTION_END)
                     SubSectionList = [SectionLine]
diff --git a/BaseTools/Source/Python/BPDG/GenVpd.py 
b/BaseTools/Source/Python/BPDG/GenVpd.py
index 887240e94cb4..69a9665f5a76 100644
--- a/BaseTools/Source/Python/BPDG/GenVpd.py
+++ b/BaseTools/Source/Python/BPDG/GenVpd.py
@@ -120,7 +120,7 @@ class PcdEntry:
     # 
     #                                
     def _PackIntValue(self, IntValue, Size):
-        if Size not in _FORMAT_CHAR.keys():
+        if Size not in _FORMAT_CHAR:
             EdkLogger.error("BPDG", BuildToolError.FORMAT_INVALID,
                             "Invalid size %d for PCD %s in integer datum 
size(File: %s Line: %s)." % (Size, self.PcdCName, self.FileName, self.Lineno))
 
diff --git a/BaseTools/Source/Python/Common/EdkIIWorkspace.py 
b/BaseTools/Source/Python/Common/EdkIIWorkspace.py
index c14b4eb52d50..9d1bb12485f9 100644
--- a/BaseTools/Source/Python/Common/EdkIIWorkspace.py
+++ b/BaseTools/Source/Python/Common/EdkIIWorkspace.py
@@ -259,10 +259,7 @@ def ConvertDictionaryToTextFile(FileName, Dictionary, 
CommentCharacter, KeySplit
     except:
         Lines = []
     Keys = Dictionary.keys()
-    MaxLength = 0
-    for Key in Keys:
-        if len(Key) > MaxLength:
-            MaxLength = len(Key)
+    MaxLength = max(map(len,Keys))
     Index = 0
     for Line in Lines:
         LineList = Line.split(KeySplitCharacter, 1)
diff --git a/BaseTools/Source/Python/Common/Expression.py 
b/BaseTools/Source/Python/Common/Expression.py
index 462e8f93f883..9a3415ccaabe 100644
--- a/BaseTools/Source/Python/Common/Expression.py
+++ b/BaseTools/Source/Python/Common/Expression.py
@@ -151,7 +151,7 @@ def ReplaceExprMacro(String, Macros, ExceptionList = None):
             InQuote = True
         MacroStartPos = String.find('$(')
         if MacroStartPos < 0:
-            for Pcd in gPlatformPcds.keys():
+            for Pcd in gPlatformPcds:
                 if Pcd in String:
                     if Pcd not in gConditionalPcds:
                         gConditionalPcds.append(Pcd)
@@ -908,7 +908,7 @@ class ValueExpressionEx(ValueExpression):
                                 for Label in LabelList:
                                     if not IsValidCName(Label):
                                         raise BadExpression('%s is not a valid 
c variable name' % Label)
-                                    if Label not in LabelDict.keys():
+                                    if Label not in LabelDict:
                                         LabelDict[Label] = str(LabelOffset)
                             if Item.startswith('UINT8'):
                                 LabelOffset = LabelOffset + 1
diff --git a/BaseTools/Source/Python/Common/Misc.py 
b/BaseTools/Source/Python/Common/Misc.py
index 23c1a4a0b236..7caf74db5eeb 100644
--- a/BaseTools/Source/Python/Common/Misc.py
+++ b/BaseTools/Source/Python/Common/Misc.py
@@ -1918,7 +1918,7 @@ class DefaultStore():
         if not self.DefaultStores or "0" in self.DefaultStores:
             return "0",TAB_DEFAULT_STORES_DEFAULT
         else:
-            minvalue = min([int(value_str) for value_str in 
self.DefaultStores.keys()])
+            minvalue = min([int(value_str) for value_str in 
self.DefaultStores])
             return (str(minvalue), self.DefaultStores[str(minvalue)])
     def GetMin(self,DefaultSIdList):
         if not DefaultSIdList:
diff --git a/BaseTools/Source/Python/Common/Parsing.py 
b/BaseTools/Source/Python/Common/Parsing.py
index d199d1e40d8e..3518c86fc53c 100644
--- a/BaseTools/Source/Python/Common/Parsing.py
+++ b/BaseTools/Source/Python/Common/Parsing.py
@@ -37,16 +37,14 @@ def ParseDefineMacro2(Table, RecordSets, GlobalMacro):
     #
     # Overrided by Global Macros
     #
-    for Key in GlobalMacro.keys():
-        Macros[Key] = GlobalMacro[Key]
+    Macros.update(GlobalMacro)
 
     #
     # Replace the Macros
     #
-    for Key in RecordSets.keys():
-        if RecordSets[Key] != []:
-            for Item in RecordSets[Key]:
-                Item[0] = ReplaceMacro(Item[0], Macros)
+    for Value in (v for v in RecordSets.values() if v):
+        for Item in Value:
+            Item[0] = ReplaceMacro(Item[0], Macros)
 
 ## ParseDefineMacro
 #
@@ -79,8 +77,7 @@ def ParseDefineMacro(Table, GlobalMacro):
     #
     # Overrided by Global Macros
     #
-    for Key in GlobalMacro.keys():
-        Macros[Key] = GlobalMacro[Key]
+    Macros.update(GlobalMacro)
 
     #
     # Found all defined macro and replaced
diff --git a/BaseTools/Source/Python/Common/String.py 
b/BaseTools/Source/Python/Common/String.py
index 5dc5b85dc5a4..dfa13d70258c 100644
--- a/BaseTools/Source/Python/Common/String.py
+++ b/BaseTools/Source/Python/Common/String.py
@@ -110,7 +110,7 @@ def GetSplitList(String, SplitStr=DataType.TAB_VALUE_SPLIT, 
MaxSplit= -1):
 # @param Arch:  The Arch to be added or merged
 #
 def MergeArches(Dict, Key, Arch):
-    if Key in Dict.keys():
+    if Key in Dict:
         Dict[Key].append(Arch)
     else:
         Dict[Key] = Arch.split()
diff --git a/BaseTools/Source/Python/Common/VpdInfoFile.py 
b/BaseTools/Source/Python/Common/VpdInfoFile.py
index b1baf06b9ccd..5559a88b97f2 100644
--- a/BaseTools/Source/Python/Common/VpdInfoFile.py
+++ b/BaseTools/Source/Python/Common/VpdInfoFile.py
@@ -6,7 +6,7 @@
 # is pointed by *_*_*_VPD_TOOL_GUID in conf/tools_def.txt 
 #
 #
-# Copyright (c) 2010 - 2016, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
 # This program and the accompanying materials
 # are licensed and made available under the terms and conditions of the BSD 
License
 # which accompanies this distribution.  The full text of the license may be 
found at
@@ -107,7 +107,7 @@ class VpdInfoFile:
                 EdkLogger.error("VpdInfoFile", 
BuildToolError.PARAMETER_INVALID,
                                 "Invalid max datum size for VPD PCD %s.%s" % 
(Vpd.TokenSpaceGuidCName, Vpd.TokenCName))
             
-        if Vpd not in self._VpdArray.keys():
+        if Vpd not in self._VpdArray:
             #
             # If there is no Vpd instance in dict, that imply this offset for 
a given SKU is a new one 
             #
@@ -180,12 +180,12 @@ class VpdInfoFile:
             if (TokenSpaceName, PcdTokenName) not in self._VpdInfo:
                 self._VpdInfo[(TokenSpaceName, PcdTokenName)] = []
             self._VpdInfo[(TokenSpaceName, 
PcdTokenName)].append((SkuId,Offset, Value))
-            for VpdObject in self._VpdArray.keys():
+            for VpdObject in self._VpdArray:
                 VpdObjectTokenCName = VpdObject.TokenCName
                 for PcdItem in GlobalData.MixedPcd:
                     if (VpdObject.TokenCName, VpdObject.TokenSpaceGuidCName) 
in GlobalData.MixedPcd[PcdItem]:
                         VpdObjectTokenCName = PcdItem[0]
-                for sku in VpdObject.SkuInfoList.keys():
+                for sku in VpdObject.SkuInfoList:
                     if VpdObject.TokenSpaceGuidCName == TokenSpaceName and 
VpdObjectTokenCName == PcdTokenName.strip() and sku == SkuId:
                         if self._VpdArray[VpdObject][sku] == "*":
                             if Offset == "*":
diff --git a/BaseTools/Source/Python/GenFds/Capsule.py 
b/BaseTools/Source/Python/GenFds/Capsule.py
index 9332f016f7da..fbd48f3c6d76 100644
--- a/BaseTools/Source/Python/GenFds/Capsule.py
+++ b/BaseTools/Source/Python/GenFds/Capsule.py
@@ -1,7 +1,7 @@
 ## @file
 # generate capsule
 #
-#  Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD 
License
@@ -201,7 +201,7 @@ class Capsule (CapsuleClassObject) :
     #   @retval string      Generated Capsule file path
     #
     def GenCapsule(self):
-        if self.UiCapsuleName.upper() + 'cap' in GenFds.ImageBinDict.keys():
+        if self.UiCapsuleName.upper() + 'cap' in GenFds.ImageBinDict:
             return GenFds.ImageBinDict[self.UiCapsuleName.upper() + 'cap']
 
         GenFdsGlobalVariable.InfLogger( "\nGenerate %s Capsule" 
%self.UiCapsuleName)
@@ -251,11 +251,11 @@ class Capsule (CapsuleClassObject) :
 
         CapInfFile.writelines("[options]" + T_CHAR_LF)
 
-        for Item in self.TokensDict.keys():
+        for Item in self.TokensDict:
             CapInfFile.writelines("EFI_"                    + \
                                   Item                      + \
                                   ' = '                     + \
-                                  self.TokensDict.get(Item) + \
+                                  self.TokensDict[Item]     + \
                                   T_CHAR_LF)
 
         return CapInfFile
diff --git a/BaseTools/Source/Python/GenFds/CapsuleData.py 
b/BaseTools/Source/Python/GenFds/CapsuleData.py
index 5b806d9e4482..b376d6b2e9be 100644
--- a/BaseTools/Source/Python/GenFds/CapsuleData.py
+++ b/BaseTools/Source/Python/GenFds/CapsuleData.py
@@ -1,7 +1,7 @@
 ## @file
 # generate capsule
 #
-#  Copyright (c) 2007-2017, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2007-2018, Intel Corporation. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD 
License
@@ -80,8 +80,8 @@ class CapsuleFv (CapsuleData):
     #
     def GenCapsuleSubItem(self):
         if self.FvName.find('.fv') == -1:
-            if self.FvName.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.FvDict.keys():
-                FvObj = 
GenFdsGlobalVariable.FdfParser.Profile.FvDict.get(self.FvName.upper())
+            if self.FvName.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.FvDict:
+                FvObj = 
GenFdsGlobalVariable.FdfParser.Profile.FvDict[self.FvName.upper()]
                 FdBuffer = StringIO.StringIO('')
                 FvObj.CapsuleName = self.CapsuleName
                 FvFile = FvObj.AddToBuffer(FdBuffer)
@@ -112,8 +112,8 @@ class CapsuleFd (CapsuleData):
     #
     def GenCapsuleSubItem(self):
         if self.FdName.find('.fd') == -1:
-            if self.FdName.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.FdDict.keys():
-                FdObj = 
GenFdsGlobalVariable.FdfParser.Profile.FdDict.get(self.FdName.upper())
+            if self.FdName.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.FdDict:
+                FdObj = 
GenFdsGlobalVariable.FdfParser.Profile.FdDict[self.FdName.upper()]
                 FdFile = FdObj.GenFd()
                 return FdFile
         else:
diff --git a/BaseTools/Source/Python/GenFds/Fd.py 
b/BaseTools/Source/Python/GenFds/Fd.py
index f735d3b5b015..cc4124ad902e 100644
--- a/BaseTools/Source/Python/GenFds/Fd.py
+++ b/BaseTools/Source/Python/GenFds/Fd.py
@@ -1,7 +1,7 @@
 ## @file
 # process FD generation
 #
-#  Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD 
License
@@ -46,7 +46,7 @@ class FD(FDClassObject):
     #   @retval string      Generated FD file name
     #
     def GenFd (self, Flag = False):
-        if self.FdUiName.upper() + 'fd' in GenFds.ImageBinDict.keys():
+        if self.FdUiName.upper() + 'fd' in GenFds.ImageBinDict:
             return GenFds.ImageBinDict[self.FdUiName.upper() + 'fd']
 
         #
diff --git a/BaseTools/Source/Python/GenFds/FdfParser.py 
b/BaseTools/Source/Python/GenFds/FdfParser.py
index 0427b80b2460..9dff0389b093 100644
--- a/BaseTools/Source/Python/GenFds/FdfParser.py
+++ b/BaseTools/Source/Python/GenFds/FdfParser.py
@@ -3401,7 +3401,7 @@ class FdfParser:
         if not self.__GetNextToken():
             raise Warning("expected FV name", self.FileName, 
self.CurrentLineNumber)
 
-        if self.__Token.upper() not in self.Profile.FvDict.keys():
+        if self.__Token.upper() not in self.Profile.FvDict:
             raise Warning("FV name does not exist", self.FileName, 
self.CurrentLineNumber)
 
         CapsuleFv = CapsuleData.CapsuleFv()
@@ -3435,7 +3435,7 @@ class FdfParser:
         if not self.__GetNextToken():
             raise Warning("expected FD name", self.FileName, 
self.CurrentLineNumber)
 
-        if self.__Token.upper() not in self.Profile.FdDict.keys():
+        if self.__Token.upper() not in self.Profile.FdDict:
             raise Warning("FD name does not exist", self.FileName, 
self.CurrentLineNumber)
 
         CapsuleFd = CapsuleData.CapsuleFd()
@@ -4531,7 +4531,7 @@ class FdfParser:
     def __GetCapInFd (self, FdName):
 
         CapList = []
-        if FdName.upper() in self.Profile.FdDict.keys():
+        if FdName.upper() in self.Profile.FdDict:
             FdObj = self.Profile.FdDict[FdName.upper()]
             for elementRegion in FdObj.RegionList:
                 if elementRegion.RegionType == 'CAPSULE':
@@ -4578,7 +4578,7 @@ class FdfParser:
     def __GetFvInFd (self, FdName):
 
         FvList = []
-        if FdName.upper() in self.Profile.FdDict.keys():
+        if FdName.upper() in self.Profile.FdDict:
             FdObj = self.Profile.FdDict[FdName.upper()]
             for elementRegion in FdObj.RegionList:
                 if elementRegion.RegionType == 'FV':
@@ -4647,7 +4647,7 @@ class FdfParser:
         # Check the cycle between FV and FD image
         #
         MaxLength = len (self.Profile.FvDict)
-        for FvName in self.Profile.FvDict.keys():
+        for FvName in self.Profile.FvDict:
             LogStr = "\nCycle Reference Checking for FV: %s\n" % FvName
             RefFvStack = []
             RefFvStack.append(FvName)
@@ -4657,7 +4657,7 @@ class FdfParser:
             while RefFvStack != [] and Index < MaxLength:
                 Index = Index + 1
                 FvNameFromStack = RefFvStack.pop()
-                if FvNameFromStack.upper() in self.Profile.FvDict.keys():
+                if FvNameFromStack.upper() in self.Profile.FvDict:
                     FvObj = self.Profile.FvDict[FvNameFromStack.upper()]
                 else:
                     continue
@@ -4696,7 +4696,7 @@ class FdfParser:
         # Check the cycle between Capsule and FD image
         #
         MaxLength = len (self.Profile.CapsuleDict)
-        for CapName in self.Profile.CapsuleDict.keys():
+        for CapName in self.Profile.CapsuleDict:
             #
             # Capsule image to be checked.
             #
@@ -4710,7 +4710,7 @@ class FdfParser:
             while RefCapStack != [] and Index < MaxLength:
                 Index = Index + 1
                 CapNameFromStack = RefCapStack.pop()
-                if CapNameFromStack.upper() in self.Profile.CapsuleDict.keys():
+                if CapNameFromStack.upper() in self.Profile.CapsuleDict:
                     CapObj = self.Profile.CapsuleDict[CapNameFromStack.upper()]
                 else:
                     continue
@@ -4755,7 +4755,7 @@ class FdfParser:
                         if RefFvName in FvAnalyzedList:
                             continue
                         LogStr += "Capsule %s contains FV %s\n" % 
(CapNameFromStack, RefFvName)
-                        if RefFvName.upper() in self.Profile.FvDict.keys():
+                        if RefFvName.upper() in self.Profile.FvDict:
                             FvObj = self.Profile.FvDict[RefFvName.upper()]
                         else:
                             continue
diff --git a/BaseTools/Source/Python/GenFds/FfsFileStatement.py 
b/BaseTools/Source/Python/GenFds/FfsFileStatement.py
index 3fd5a9c2158a..ba8e0465ef34 100644
--- a/BaseTools/Source/Python/GenFds/FfsFileStatement.py
+++ b/BaseTools/Source/Python/GenFds/FfsFileStatement.py
@@ -1,7 +1,7 @@
 ## @file
 # process FFS generation from FILE statement
 #
-#  Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD 
License
@@ -83,14 +83,14 @@ class FileStatement (FileStatementClassObject) :
         SectionAlignments = None
         if self.FvName is not None :
             Buffer = StringIO.StringIO('')
-            if self.FvName.upper() not in 
GenFdsGlobalVariable.FdfParser.Profile.FvDict.keys():
+            if self.FvName.upper() not in 
GenFdsGlobalVariable.FdfParser.Profile.FvDict:
                 EdkLogger.error("GenFds", GENFDS_ERROR, "FV (%s) is NOT 
described in FDF file!" % (self.FvName))
             Fv = 
GenFdsGlobalVariable.FdfParser.Profile.FvDict.get(self.FvName.upper())
             FileName = Fv.AddToBuffer(Buffer)
             SectionFiles = [FileName]
 
         elif self.FdName is not None:
-            if self.FdName.upper() not in 
GenFdsGlobalVariable.FdfParser.Profile.FdDict.keys():
+            if self.FdName.upper() not in 
GenFdsGlobalVariable.FdfParser.Profile.FdDict:
                 EdkLogger.error("GenFds", GENFDS_ERROR, "FD (%s) is NOT 
described in FDF file!" % (self.FdName))
             Fd = 
GenFdsGlobalVariable.FdfParser.Profile.FdDict.get(self.FdName.upper())
             FileName = Fd.GenFd()
diff --git a/BaseTools/Source/Python/GenFds/FfsInfStatement.py 
b/BaseTools/Source/Python/GenFds/FfsInfStatement.py
index 5364569b96d7..7dc009ef9a16 100644
--- a/BaseTools/Source/Python/GenFds/FfsInfStatement.py
+++ b/BaseTools/Source/Python/GenFds/FfsInfStatement.py
@@ -612,7 +612,7 @@ class FfsInfStatement(FfsInfStatementClassObject):
                     # the file name FILE_GUIDmodule.inf, then 
PlatformDataBase.Modules use FILE_GUIDmodule.inf as key,
                     # but the path (self.MetaFile.Path) is the real path
                     #
-                    for key in PlatformDataBase.Modules.keys():
+                    for key in PlatformDataBase.Modules:
                         if InfFileKey == 
str((PlatformDataBase.Modules[key]).MetaFile.Path):
                             DscArchList.append (Arch)
                             break
diff --git a/BaseTools/Source/Python/GenFds/Fv.py 
b/BaseTools/Source/Python/GenFds/Fv.py
index aae644bef905..ef5896d76b12 100644
--- a/BaseTools/Source/Python/GenFds/Fv.py
+++ b/BaseTools/Source/Python/GenFds/Fv.py
@@ -70,7 +70,7 @@ class FV (FvClassObject):
     #
     def AddToBuffer (self, Buffer, BaseAddress=None, BlockSize= None, 
BlockNum=None, ErasePloarity='1', VtfDict=None, MacroDict = {}, Flag=False) :
 
-        if BaseAddress is None and self.UiFvName.upper() + 'fv' in 
GenFds.ImageBinDict.keys():
+        if BaseAddress is None and self.UiFvName.upper() + 'fv' in 
GenFds.ImageBinDict:
             return GenFds.ImageBinDict[self.UiFvName.upper() + 'fv']
         
         #
@@ -78,14 +78,13 @@ class FV (FvClassObject):
         # If yes, return error. Doesn't support FV in Capsule image is also in 
FD flash region.
         #
         if self.CapsuleName is not None:
-            for FdName in GenFdsGlobalVariable.FdfParser.Profile.FdDict.keys():
-                FdObj = GenFdsGlobalVariable.FdfParser.Profile.FdDict[FdName]
+            for FdObj in 
GenFdsGlobalVariable.FdfParser.Profile.FdDict.values():
                 for RegionObj in FdObj.RegionList:
                     if RegionObj.RegionType == 'FV':
                         for RegionData in RegionObj.RegionDataList:
                             if RegionData.endswith(".fv"):
                                 continue
-                            elif RegionData.upper() + 'fv' in 
GenFds.ImageBinDict.keys():
+                            elif RegionData.upper() + 'fv' in 
GenFds.ImageBinDict:
                                 continue
                             elif self.UiFvName.upper() == RegionData.upper():
                                 GenFdsGlobalVariable.ErrorLogger("Capsule %s 
in FD region can't contain a FV %s in FD region." % (self.CapsuleName, 
self.UiFvName.upper()))
@@ -235,8 +234,7 @@ class FV (FvClassObject):
         if self.BlockSizeList:
             return True
 
-        for FdName in GenFdsGlobalVariable.FdfParser.Profile.FdDict.keys():
-            FdObj = GenFdsGlobalVariable.FdfParser.Profile.FdDict[FdName]
+        for FdObj in GenFdsGlobalVariable.FdfParser.Profile.FdDict.values():
             for RegionObj in FdObj.RegionList:
                 if RegionObj.RegionType != 'FV':
                     continue
@@ -441,7 +439,7 @@ class FV (FvClassObject):
         # Add [Files]
         #
         self.FvInfFile.writelines("[files]" + T_CHAR_LF)
-        if VtfDict is not None and self.UiFvName in VtfDict.keys():
+        if VtfDict and self.UiFvName in VtfDict:
             self.FvInfFile.writelines("EFI_FILE_NAME = "                   + \
-                                       VtfDict.get(self.UiFvName)          + \
+                                       VtfDict[self.UiFvName]              + \
                                        T_CHAR_LF)
diff --git a/BaseTools/Source/Python/GenFds/GenFds.py 
b/BaseTools/Source/Python/GenFds/GenFds.py
index 810a1f86e948..1fa76021341b 100644
--- a/BaseTools/Source/Python/GenFds/GenFds.py
+++ b/BaseTools/Source/Python/GenFds/GenFds.py
@@ -92,7 +92,7 @@ def main():
         else:
             Workspace = os.path.normcase(Options.Workspace)
             GenFdsGlobalVariable.WorkSpaceDir = Workspace
-            if 'EDK_SOURCE' in os.environ.keys():
+            if 'EDK_SOURCE' in os.environ:
                 GenFdsGlobalVariable.EdkSourceDir = 
os.path.normcase(os.environ['EDK_SOURCE'])
             if (Options.debug):
                 GenFdsGlobalVariable.VerboseLogger("Using Workspace:" + 
Workspace)
@@ -156,7 +156,7 @@ def main():
                 # This also handles someone specifying the Conf directory in 
the workspace. Using --conf=Conf
                 ConfDirectoryPath = 
os.path.join(GenFdsGlobalVariable.WorkSpaceDir, ConfDirectoryPath)
         else:
-            if "CONF_PATH" in os.environ.keys():
+            if "CONF_PATH" in os.environ:
                 ConfDirectoryPath = os.path.normcase(os.environ["CONF_PATH"])
             else:
                 # Get standard WORKSPACE/Conf, use the absolute path to the 
WORKSPACE/Conf
@@ -216,11 +216,11 @@ def main():
         os.environ["WORKSPACE"] = Workspace
 
         # Use the -t and -b option as gGlobalDefines's TOOLCHAIN and TARGET if 
they are not defined
-        if "TARGET" not in GlobalData.gGlobalDefines.keys():
+        if "TARGET" not in GlobalData.gGlobalDefines:
             GlobalData.gGlobalDefines["TARGET"] = 
GenFdsGlobalVariable.TargetName
-        if "TOOLCHAIN" not in GlobalData.gGlobalDefines.keys():
+        if "TOOLCHAIN" not in GlobalData.gGlobalDefines:
             GlobalData.gGlobalDefines["TOOLCHAIN"] = 
GenFdsGlobalVariable.ToolChainTag
-        if "TOOL_CHAIN_TAG" not in GlobalData.gGlobalDefines.keys():
+        if "TOOL_CHAIN_TAG" not in GlobalData.gGlobalDefines:
             GlobalData.gGlobalDefines['TOOL_CHAIN_TAG'] = 
GenFdsGlobalVariable.ToolChainTag
 
         """call Workspace build create database"""
@@ -278,21 +278,21 @@ def main():
             EdkLogger.error("GenFds", FORMAT_NOT_SUPPORTED, "Cycle Reference 
Detected in FDF file")
 
         if (Options.uiFdName) :
-            if Options.uiFdName.upper() in FdfParserObj.Profile.FdDict.keys():
+            if Options.uiFdName.upper() in FdfParserObj.Profile.FdDict:
                 GenFds.OnlyGenerateThisFd = Options.uiFdName
             else:
                 EdkLogger.error("GenFds", OPTION_VALUE_INVALID,
                                 "No such an FD in FDF file: %s" % 
Options.uiFdName)
 
         if (Options.uiFvName) :
-            if Options.uiFvName.upper() in FdfParserObj.Profile.FvDict.keys():
+            if Options.uiFvName.upper() in FdfParserObj.Profile.FvDict:
                 GenFds.OnlyGenerateThisFv = Options.uiFvName
             else:
                 EdkLogger.error("GenFds", OPTION_VALUE_INVALID,
                                 "No such an FV in FDF file: %s" % 
Options.uiFvName)
 
         if (Options.uiCapName) :
-            if Options.uiCapName.upper() in 
FdfParserObj.Profile.CapsuleDict.keys():
+            if Options.uiCapName.upper() in FdfParserObj.Profile.CapsuleDict:
                 GenFds.OnlyGenerateThisCap = Options.uiCapName
             else:
                 EdkLogger.error("GenFds", OPTION_VALUE_INVALID,
@@ -388,7 +388,7 @@ def FindExtendTool(KeyStringList, CurrentArchList, 
NameGuid):
                 KeyStringList.append(Target + '_' + ToolChain + '_' + Arch)
 
     if GenFdsGlobalVariable.GuidToolDefinition:
-        if NameGuid in GenFdsGlobalVariable.GuidToolDefinition.keys():
+        if NameGuid in GenFdsGlobalVariable.GuidToolDefinition:
             return GenFdsGlobalVariable.GuidToolDefinition[NameGuid]
 
     ToolDefinition = 
ToolDefClassObject.ToolDefDict(GenFdsGlobalVariable.ConfDir).ToolsDefTxtDictionary
@@ -450,10 +450,10 @@ def FindExtendTool(KeyStringList, CurrentArchList, 
NameGuid):
                     if Key in KeyStringList and KeyList[4] == 'GUID':
                         ToolPathKey   = Key + '_' + KeyList[3] + '_PATH'
                         ToolOptionKey = Key + '_' + KeyList[3] + '_FLAGS'
-        if ToolPathKey in BuildOption.keys():
-            ToolPathTmp = BuildOption.get(ToolPathKey)
-        if ToolOptionKey in BuildOption.keys():
-            ToolOption = BuildOption.get(ToolOptionKey)
+        if ToolPathKey in BuildOption:
+            ToolPathTmp = BuildOption[ToolPathKey]
+        if ToolOptionKey in BuildOption:
+            ToolOption = BuildOption[ToolOptionKey]
 
     GenFdsGlobalVariable.GuidToolDefinition[NameGuid] = (ToolPathTmp, 
ToolOption)
     return ToolPathTmp, ToolOption
@@ -522,63 +522,56 @@ class GenFds :
         GenFdsGlobalVariable.SetDir ('', FdfParser, WorkSpace, ArchList)
 
         GenFdsGlobalVariable.VerboseLogger(" Generate all Fd images and their 
required FV and Capsule images!")
-        if GenFds.OnlyGenerateThisCap is not None and 
GenFds.OnlyGenerateThisCap.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.CapsuleDict.keys():
-            CapsuleObj = 
GenFdsGlobalVariable.FdfParser.Profile.CapsuleDict.get(GenFds.OnlyGenerateThisCap.upper())
+        if GenFds.OnlyGenerateThisCap is not None and 
GenFds.OnlyGenerateThisCap.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.CapsuleDict:
+            CapsuleObj = 
GenFdsGlobalVariable.FdfParser.Profile.CapsuleDict[GenFds.OnlyGenerateThisCap.upper()]
             if CapsuleObj is not None:
                 CapsuleObj.GenCapsule()
                 return
 
-        if GenFds.OnlyGenerateThisFd is not None and 
GenFds.OnlyGenerateThisFd.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.FdDict.keys():
-            FdObj = 
GenFdsGlobalVariable.FdfParser.Profile.FdDict.get(GenFds.OnlyGenerateThisFd.upper())
+        if GenFds.OnlyGenerateThisFd is not None and 
GenFds.OnlyGenerateThisFd.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.FdDict:
+            FdObj = 
GenFdsGlobalVariable.FdfParser.Profile.FdDict[GenFds.OnlyGenerateThisFd.upper()]
             if FdObj is not None:
                 FdObj.GenFd()
                 return
         elif GenFds.OnlyGenerateThisFd is None and GenFds.OnlyGenerateThisFv 
is None:
-            for FdName in GenFdsGlobalVariable.FdfParser.Profile.FdDict.keys():
-                FdObj = GenFdsGlobalVariable.FdfParser.Profile.FdDict[FdName]
+            for FdObj in 
GenFdsGlobalVariable.FdfParser.Profile.FdDict.values():
                 FdObj.GenFd()
 
         GenFdsGlobalVariable.VerboseLogger("\n Generate other FV images! ")
-        if GenFds.OnlyGenerateThisFv is not None and 
GenFds.OnlyGenerateThisFv.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.FvDict.keys():
-            FvObj = 
GenFdsGlobalVariable.FdfParser.Profile.FvDict.get(GenFds.OnlyGenerateThisFv.upper())
+        if GenFds.OnlyGenerateThisFv is not None and 
GenFds.OnlyGenerateThisFv.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.FvDict:
+            FvObj = 
GenFdsGlobalVariable.FdfParser.Profile.FvDict[GenFds.OnlyGenerateThisFv.upper()]
             if FvObj is not None:
                 Buffer = StringIO.StringIO()
                 FvObj.AddToBuffer(Buffer)
                 Buffer.close()
                 return
         elif GenFds.OnlyGenerateThisFv is None:
-            for FvName in GenFdsGlobalVariable.FdfParser.Profile.FvDict.keys():
+            for FvObj in 
GenFdsGlobalVariable.FdfParser.Profile.FvDict.values():
                 Buffer = StringIO.StringIO('')
-                FvObj = GenFdsGlobalVariable.FdfParser.Profile.FvDict[FvName]
                 FvObj.AddToBuffer(Buffer)
                 Buffer.close()
         
         if GenFds.OnlyGenerateThisFv is None and GenFds.OnlyGenerateThisFd is 
None and GenFds.OnlyGenerateThisCap is None:
             if GenFdsGlobalVariable.FdfParser.Profile.CapsuleDict != {}:
                 GenFdsGlobalVariable.VerboseLogger("\n Generate other Capsule 
images!")
-                for CapsuleName in 
GenFdsGlobalVariable.FdfParser.Profile.CapsuleDict.keys():
-                    CapsuleObj = 
GenFdsGlobalVariable.FdfParser.Profile.CapsuleDict[CapsuleName]
+                for CapsuleObj in 
GenFdsGlobalVariable.FdfParser.Profile.CapsuleDict.values():
                     CapsuleObj.GenCapsule()
 
             if GenFdsGlobalVariable.FdfParser.Profile.OptRomDict != {}:
                 GenFdsGlobalVariable.VerboseLogger("\n Generate all Option 
ROM!")
-                for DriverName in 
GenFdsGlobalVariable.FdfParser.Profile.OptRomDict.keys():
-                    OptRomObj = 
GenFdsGlobalVariable.FdfParser.Profile.OptRomDict[DriverName]
+                for OptRomObj in 
GenFdsGlobalVariable.FdfParser.Profile.OptRomDict.values():
                     OptRomObj.AddToBuffer(None)
     @staticmethod
     def GenFfsMakefile(OutputDir, FdfParser, WorkSpace, ArchList, GlobalData):
         GenFdsGlobalVariable.SetEnv(FdfParser, WorkSpace, ArchList, GlobalData)
-        for FdName in GenFdsGlobalVariable.FdfParser.Profile.FdDict.keys():
-            FdObj = GenFdsGlobalVariable.FdfParser.Profile.FdDict[FdName]
+        for FdObj in GenFdsGlobalVariable.FdfParser.Profile.FdDict.values():
             FdObj.GenFd(Flag=True)
 
-        for FvName in GenFdsGlobalVariable.FdfParser.Profile.FvDict.keys():
-            FvObj = GenFdsGlobalVariable.FdfParser.Profile.FvDict[FvName]
+        for FvObj in GenFdsGlobalVariable.FdfParser.Profile.FvDict.values():
             FvObj.AddToBuffer(Buffer=None, Flag=True)
 
         if GenFdsGlobalVariable.FdfParser.Profile.OptRomDict != {}:
-            for DriverName in 
GenFdsGlobalVariable.FdfParser.Profile.OptRomDict.keys():
-                OptRomObj = 
GenFdsGlobalVariable.FdfParser.Profile.OptRomDict[DriverName]
+            for OptRomObj in 
GenFdsGlobalVariable.FdfParser.Profile.OptRomDict.values():
                 OptRomObj.AddToBuffer(Buffer=None, Flag=True)
 
         return GenFdsGlobalVariable.FfsCmdDict
@@ -591,7 +584,7 @@ class GenFds :
     def GetFvBlockSize(FvObj):
         DefaultBlockSize = 0x1
         FdObj = None
-        if GenFds.OnlyGenerateThisFd is not None and 
GenFds.OnlyGenerateThisFd.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.FdDict.keys():
+        if GenFds.OnlyGenerateThisFd is not None and 
GenFds.OnlyGenerateThisFd.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.FdDict:
             FdObj = 
GenFdsGlobalVariable.FdfParser.Profile.FdDict[GenFds.OnlyGenerateThisFd.upper()]
         if FdObj is None:
             for ElementFd in 
GenFdsGlobalVariable.FdfParser.Profile.FdDict.values():
diff --git a/BaseTools/Source/Python/GenFds/GenFdsGlobalVariable.py 
b/BaseTools/Source/Python/GenFds/GenFdsGlobalVariable.py
index 2f9d58f6bf37..6f586ff2dad8 100644
--- a/BaseTools/Source/Python/GenFds/GenFdsGlobalVariable.py
+++ b/BaseTools/Source/Python/GenFds/GenFdsGlobalVariable.py
@@ -549,7 +549,7 @@ class GenFdsGlobalVariable:
 
         GenFdsGlobalVariable.DebugLogger(EdkLogger.DEBUG_5, "%s needs update 
because of newer %s" % (Output, Input))
         if MakefilePath:
-            if 
(tuple(Cmd),tuple(GenFdsGlobalVariable.SecCmdList),tuple(GenFdsGlobalVariable.CopyList))
 not in GenFdsGlobalVariable.FfsCmdDict.keys():
+            if 
(tuple(Cmd),tuple(GenFdsGlobalVariable.SecCmdList),tuple(GenFdsGlobalVariable.CopyList))
 not in GenFdsGlobalVariable.FfsCmdDict:
                 GenFdsGlobalVariable.FfsCmdDict[tuple(Cmd), 
tuple(GenFdsGlobalVariable.SecCmdList), tuple(GenFdsGlobalVariable.CopyList)] = 
MakefilePath
             GenFdsGlobalVariable.SecCmdList = []
             GenFdsGlobalVariable.CopyList = []
@@ -779,7 +779,7 @@ class GenFdsGlobalVariable:
         if MacroDict is not None  and len (MacroDict) != 0:
             Dict.update(MacroDict)
 
-        for key in Dict.keys():
+        for key in Dict:
             if Str.find(key) >= 0 :
                 Str = Str.replace (key, Dict[key])
 
diff --git a/BaseTools/Source/Python/GenFds/Region.py 
b/BaseTools/Source/Python/GenFds/Region.py
index e639739b7e03..44f122a71216 100644
--- a/BaseTools/Source/Python/GenFds/Region.py
+++ b/BaseTools/Source/Python/GenFds/Region.py
@@ -1,7 +1,7 @@
 ## @file
 # process FD Region generation
 #
-#  Copyright (c) 2007 - 2017, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD 
License
@@ -102,7 +102,7 @@ class Region(RegionClassObject):
                         EdkLogger.error("GenFds", FILE_NOT_FOUND, 
ExtraData=RegionData)
 
                     FileName = RegionData
-                elif RegionData.upper() + 'fv' in ImageBinDict.keys():
+                elif RegionData.upper() + 'fv' in ImageBinDict:
                     if not Flag:
                         GenFdsGlobalVariable.InfLogger('   Region Name = FV')
                     FileName = ImageBinDict[RegionData.upper() + 'fv']
@@ -111,8 +111,8 @@ class Region(RegionClassObject):
                     # Generate FvImage.
                     #
                     FvObj = None
-                    if RegionData.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.FvDict.keys():
-                        FvObj = 
GenFdsGlobalVariable.FdfParser.Profile.FvDict.get(RegionData.upper())
+                    if RegionData.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.FvDict:
+                        FvObj = 
GenFdsGlobalVariable.FdfParser.Profile.FvDict[RegionData.upper()]
 
                     if FvObj is not None :
                         if not Flag:
@@ -182,7 +182,7 @@ class Region(RegionClassObject):
                         EdkLogger.error("GenFds", FILE_NOT_FOUND, 
ExtraData=RegionData)
 
                     FileName = RegionData
-                elif RegionData.upper() + 'cap' in ImageBinDict.keys():
+                elif RegionData.upper() + 'cap' in ImageBinDict:
                     GenFdsGlobalVariable.InfLogger('   Region Name = CAPSULE')
                     FileName = ImageBinDict[RegionData.upper() + 'cap']
                 else:
@@ -190,7 +190,7 @@ class Region(RegionClassObject):
                     # Generate Capsule image and Put it into FD buffer
                     #
                     CapsuleObj = None
-                    if RegionData.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.CapsuleDict.keys():
+                    if RegionData.upper() in 
GenFdsGlobalVariable.FdfParser.Profile.CapsuleDict:
                         CapsuleObj = 
GenFdsGlobalVariable.FdfParser.Profile.CapsuleDict[RegionData.upper()]
 
                     if CapsuleObj is not None :
diff --git a/BaseTools/Source/Python/TargetTool/TargetTool.py 
b/BaseTools/Source/Python/TargetTool/TargetTool.py
index 143b53ec35ef..ecac316b7a3a 100644
--- a/BaseTools/Source/Python/TargetTool/TargetTool.py
+++ b/BaseTools/Source/Python/TargetTool/TargetTool.py
@@ -1,7 +1,7 @@
 ## @file
 # Target Tool Parser
 #
-#  Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
 #
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD 
License
@@ -65,7 +65,7 @@ class TargetTool():
                 LineList = Line.split(KeySplitCharacter,1)
                 if len(LineList) >= 2:
                     Key = LineList[0].strip()
-                    if Key.startswith(CommentCharacter) == False and Key in 
self.TargetTxtDictionary.keys():
+                    if Key.startswith(CommentCharacter) == False and Key in 
self.TargetTxtDictionary:
                         if Key == TAB_TAT_DEFINES_ACTIVE_PLATFORM or Key == 
TAB_TAT_DEFINES_TOOL_CHAIN_CONF \
                           or Key == 
TAB_TAT_DEFINES_MAX_CONCURRENT_THREAD_NUMBER \
                           or Key == TAB_TAT_DEFINES_ACTIVE_MODULE:
@@ -105,7 +105,7 @@ class TargetTool():
                     LineList = Line.split(KeySplitCharacter,1)
                     if len(LineList) >= 2:
                         Key = LineList[0].strip()
-                        if Key.startswith(CommentCharacter) == False and Key 
in self.TargetTxtDictionary.keys():
+                        if Key.startswith(CommentCharacter) == False and Key 
in self.TargetTxtDictionary:
                             if Key not in existKeys:
                                 existKeys.append(Key)
                             else:
@@ -118,7 +118,7 @@ class TargetTool():
                                 if ret is not None:
                                     Line = ret
                             fw.write(Line)
-            for key in self.TargetTxtDictionary.keys():
+            for key in self.TargetTxtDictionary:
                 if key not in existKeys:
                     print "Warning: %s does not exist in original 
configuration file" % key
                     Line = GetConfigureKeyValue(self, key)
diff --git a/BaseTools/Source/Python/Workspace/DscBuildData.py 
b/BaseTools/Source/Python/Workspace/DscBuildData.py
index 9c77d6c50c27..ee97c4c842bd 100644
--- a/BaseTools/Source/Python/Workspace/DscBuildData.py
+++ b/BaseTools/Source/Python/Workspace/DscBuildData.py
@@ -593,7 +593,7 @@ class DscBuildData(PlatformBuildClassObject):
         #
         # If command line defined, should override the value in DSC file.
         #
-        if 'FIX_LOAD_TOP_MEMORY_ADDRESS' in 
GlobalData.gCommandLineDefines.keys():
+        if 'FIX_LOAD_TOP_MEMORY_ADDRESS' in GlobalData.gCommandLineDefines:
             try:
                 self._LoadFixAddress = 
int(GlobalData.gCommandLineDefines['FIX_LOAD_TOP_MEMORY_ADDRESS'], 0)
             except:
@@ -1210,7 +1210,7 @@ class DscBuildData(PlatformBuildClassObject):
         for item in GlobalData.BuildOptionPcd:
             if len(item) == 5 and (item[1],item[0]) in StruPcds:
                 StructurePcdInCom[(item[0],item[1],item[2] )] = 
(item[3],item[4])
-        GlobalPcds = set([(item[0],item[1]) for item in 
StructurePcdInCom.keys()])
+        GlobalPcds = {(item[0],item[1]) for item in StructurePcdInCom}
         for Pcd in StruPcds.values():
             if (Pcd.TokenSpaceGuidCName,Pcd.TokenCName) not in GlobalPcds:
                 continue
@@ -1285,7 +1285,7 @@ class DscBuildData(PlatformBuildClassObject):
         DefaultStoreMgr = DefaultStore(self.DefaultStores)
         SkuIds = self.SkuIdMgr.AvailableSkuIdSet
         SkuIds.update({'DEFAULT':0})
-        DefaultStores = set([storename for pcdobj in AllPcds.values() for 
skuobj in pcdobj.SkuInfoList.values() for storename in 
skuobj.DefaultStoreDict.keys()])
+        DefaultStores = {storename for pcdobj in AllPcds.values() for skuobj 
in pcdobj.SkuInfoList.values() for storename in skuobj.DefaultStoreDict}
 
         S_PcdSet = []
         # Find out all possible PCD candidates for self._Arch
@@ -1430,10 +1430,10 @@ class DscBuildData(PlatformBuildClassObject):
 
             for pcdkey in Pcds:
                 pcd = Pcds[pcdkey]
-                if 'DEFAULT' not in pcd.SkuInfoList.keys() and 'COMMON' in 
pcd.SkuInfoList.keys():
+                if 'DEFAULT' not in pcd.SkuInfoList and 'COMMON' in 
pcd.SkuInfoList:
                     pcd.SkuInfoList['DEFAULT'] = pcd.SkuInfoList['COMMON']
                     del(pcd.SkuInfoList['COMMON'])
-                elif 'DEFAULT' in pcd.SkuInfoList.keys() and 'COMMON' in 
pcd.SkuInfoList.keys():
+                elif 'DEFAULT' in pcd.SkuInfoList and 'COMMON' in 
pcd.SkuInfoList:
                     del(pcd.SkuInfoList['COMMON'])
 
         map(self.FilterSkuSettings,[Pcds[pcdkey] for pcdkey in Pcds if 
Pcds[pcdkey].Type in DynamicPcdType])
@@ -1883,7 +1883,7 @@ class DscBuildData(PlatformBuildClassObject):
         OverrideValues = {DefaultStore:""}
         if Pcd.SkuOverrideValues:
             OverrideValues = Pcd.SkuOverrideValues[SkuName]
-        for DefaultStoreName in OverrideValues.keys():
+        for DefaultStoreName in OverrideValues:
             CApp = CApp + 'void\n'
             CApp = CApp + 'Initialize_%s_%s_%s_%s(\n' % (SkuName, 
DefaultStoreName, Pcd.TokenSpaceGuidCName, Pcd.TokenCName)
             CApp = CApp + '  void\n'
@@ -2261,7 +2261,7 @@ class DscBuildData(PlatformBuildClassObject):
 
             PcdValue, DatumType, MaxDatumSize = self._ValidatePcd(PcdCName, 
TokenSpaceGuid, Setting, Type, Dummy4)
             SkuInfo = SkuInfoClass(SkuName, self.SkuIds[SkuName][0], '', '', 
'', '', '', PcdValue)
-            if (PcdCName, TokenSpaceGuid) in Pcds.keys():
+            if (PcdCName, TokenSpaceGuid) in Pcds:
                 pcdObject = Pcds[PcdCName, TokenSpaceGuid]
                 pcdObject.SkuInfoList[SkuName] = SkuInfo
                 if MaxDatumSize.strip():
@@ -2294,14 +2294,14 @@ class DscBuildData(PlatformBuildClassObject):
             for sku in pcd.SkuInfoList.values():
                 if not sku.DefaultValue:
                     sku.DefaultValue = pcdDecObject.DefaultValue
-            if 'DEFAULT' not in pcd.SkuInfoList.keys() and 'COMMON' not in 
pcd.SkuInfoList.keys():
+            if 'DEFAULT' not in pcd.SkuInfoList and 'COMMON' not in 
pcd.SkuInfoList:
                 valuefromDec = pcdDecObject.DefaultValue
                 SkuInfo = SkuInfoClass('DEFAULT', '0', '', '', '', '', '', 
valuefromDec)
                 pcd.SkuInfoList['DEFAULT'] = SkuInfo
-            elif 'DEFAULT' not in pcd.SkuInfoList.keys() and 'COMMON' in 
pcd.SkuInfoList.keys():
+            elif 'DEFAULT' not in pcd.SkuInfoList and 'COMMON' in 
pcd.SkuInfoList:
                 pcd.SkuInfoList['DEFAULT'] = pcd.SkuInfoList['COMMON']
                 del(pcd.SkuInfoList['COMMON'])
-            elif 'DEFAULT' in pcd.SkuInfoList.keys() and 'COMMON' in 
pcd.SkuInfoList.keys():
+            elif 'DEFAULT' in pcd.SkuInfoList and 'COMMON' in pcd.SkuInfoList:
                 del(pcd.SkuInfoList['COMMON'])
 
         map(self.FilterSkuSettings,Pcds.values())
@@ -2311,7 +2311,7 @@ class DscBuildData(PlatformBuildClassObject):
     def FilterSkuSettings(self, PcdObj):
 
         if self.SkuIdMgr.SkuUsageType == self.SkuIdMgr.SINGLE:
-            if 'DEFAULT' in PcdObj.SkuInfoList.keys() and 
self.SkuIdMgr.SystemSkuId not in PcdObj.SkuInfoList.keys():
+            if 'DEFAULT' in PcdObj.SkuInfoList and self.SkuIdMgr.SystemSkuId 
not in PcdObj.SkuInfoList:
                 PcdObj.SkuInfoList[self.SkuIdMgr.SystemSkuId] = 
PcdObj.SkuInfoList['DEFAULT']
             PcdObj.SkuInfoList = 
{'DEFAULT':PcdObj.SkuInfoList[self.SkuIdMgr.SystemSkuId]}
             PcdObj.SkuInfoList['DEFAULT'].SkuIdName = 'DEFAULT'
@@ -2352,7 +2352,7 @@ class DscBuildData(PlatformBuildClassObject):
         Pcds = {}
         DefaultStoreObj = DefaultStore(self._GetDefaultStores())
         SkuIds = {skuname:skuid for skuname,skuid in 
self.SkuIdMgr.AvailableSkuIdSet.items() if skuname !='COMMON'}
-        DefaultStores = set([storename for pcdobj in PcdSet.values() for 
skuobj in pcdobj.SkuInfoList.values() for storename in 
skuobj.DefaultStoreDict.keys()])
+        DefaultStores = set([storename for pcdobj in PcdSet.values() for 
skuobj in pcdobj.SkuInfoList.values() for storename in skuobj.DefaultStoreDict])
         for PcdCName, TokenSpaceGuid in PcdSet:
             PcdObj = PcdSet[(PcdCName, TokenSpaceGuid)]
             self.CopyDscRawValue(PcdObj)
@@ -2465,7 +2465,7 @@ class DscBuildData(PlatformBuildClassObject):
                     EdkLogger.error('Build', 
PCD_VARIABLE_ATTRIBUTES_CONFLICT_ERROR, "The variable %s.%s for DynamicHii PCDs 
has conflicting attributes [%s] and [%s] " % (VariableGuid, VariableName, 
VarAttribute, VariableAttrs[(VariableName, VariableGuid)]))
 
             pcdDecObject = self._DecPcds[PcdCName, TokenSpaceGuid]
-            if (PcdCName, TokenSpaceGuid) in Pcds.keys():
+            if (PcdCName, TokenSpaceGuid) in Pcds:
                 pcdObject = Pcds[PcdCName, TokenSpaceGuid]
                 if SkuName in pcdObject.SkuInfoList:
                     Skuitem = pcdObject.SkuInfoList[SkuName]
@@ -2503,14 +2503,14 @@ class DscBuildData(PlatformBuildClassObject):
                     for default_store in sku.DefaultStoreDict:
                         
sku.DefaultStoreDict[default_store]=pcdDecObject.DefaultValue
                     pcd.DefaultValue = pcdDecObject.DefaultValue
-            if 'DEFAULT' not in pcd.SkuInfoList.keys() and 'COMMON' not in 
pcd.SkuInfoList.keys():
+            if 'DEFAULT' not in pcd.SkuInfoList and 'COMMON' not in 
pcd.SkuInfoList:
                 valuefromDec = pcdDecObject.DefaultValue
                 SkuInfo = SkuInfoClass('DEFAULT', '0', 
SkuInfoObj.VariableName, SkuInfoObj.VariableGuid, SkuInfoObj.VariableOffset, 
valuefromDec,VariableAttribute=SkuInfoObj.VariableAttribute,DefaultStore={DefaultStore:valuefromDec})
                 pcd.SkuInfoList['DEFAULT'] = SkuInfo
-            elif 'DEFAULT' not in pcd.SkuInfoList.keys() and 'COMMON' in 
pcd.SkuInfoList.keys():
+            elif 'DEFAULT' not in pcd.SkuInfoList and 'COMMON' in 
pcd.SkuInfoList:
                 pcd.SkuInfoList['DEFAULT'] = pcd.SkuInfoList['COMMON']
                 del(pcd.SkuInfoList['COMMON'])
-            elif 'DEFAULT' in pcd.SkuInfoList.keys() and 'COMMON' in 
pcd.SkuInfoList.keys():
+            elif 'DEFAULT' in pcd.SkuInfoList and 'COMMON' in pcd.SkuInfoList:
                 del(pcd.SkuInfoList['COMMON'])
 
             if pcd.MaxDatumSize.strip():
@@ -2592,7 +2592,7 @@ class DscBuildData(PlatformBuildClassObject):
             #
             VpdOffset, MaxDatumSize, InitialValue = 
self._ValidatePcd(PcdCName, TokenSpaceGuid, Setting, Type, Dummy4)
             SkuInfo = SkuInfoClass(SkuName, self.SkuIds[SkuName][0], '', '', 
'', '', VpdOffset, InitialValue)
-            if (PcdCName, TokenSpaceGuid) in Pcds.keys():
+            if (PcdCName, TokenSpaceGuid) in Pcds:
                 pcdObject = Pcds[PcdCName, TokenSpaceGuid]
                 pcdObject.SkuInfoList[SkuName] = SkuInfo
                 if MaxDatumSize.strip():
@@ -2626,14 +2626,14 @@ class DscBuildData(PlatformBuildClassObject):
             for sku in pcd.SkuInfoList.values():
                 if not sku.DefaultValue:
                     sku.DefaultValue = pcdDecObject.DefaultValue
-            if 'DEFAULT' not in pcd.SkuInfoList.keys() and 'COMMON' not in 
pcd.SkuInfoList.keys():
+            if 'DEFAULT' not in pcd.SkuInfoList and 'COMMON' not in 
pcd.SkuInfoList:
                 valuefromDec = pcdDecObject.DefaultValue
                 SkuInfo = SkuInfoClass('DEFAULT', '0', '', '', '', '', 
SkuInfoObj.VpdOffset, valuefromDec)
                 pcd.SkuInfoList['DEFAULT'] = SkuInfo
-            elif 'DEFAULT' not in pcd.SkuInfoList.keys() and 'COMMON' in 
pcd.SkuInfoList.keys():
+            elif 'DEFAULT' not in pcd.SkuInfoList and 'COMMON' in 
pcd.SkuInfoList:
                 pcd.SkuInfoList['DEFAULT'] = pcd.SkuInfoList['COMMON']
                 del(pcd.SkuInfoList['COMMON'])
-            elif 'DEFAULT' in pcd.SkuInfoList.keys() and 'COMMON' in 
pcd.SkuInfoList.keys():
+            elif 'DEFAULT' in pcd.SkuInfoList and 'COMMON' in pcd.SkuInfoList:
                 del(pcd.SkuInfoList['COMMON'])
 
 
diff --git a/BaseTools/Source/Python/Workspace/InfBuildData.py 
b/BaseTools/Source/Python/Workspace/InfBuildData.py
index e10873ae5903..ef0c61668d14 100644
--- a/BaseTools/Source/Python/Workspace/InfBuildData.py
+++ b/BaseTools/Source/Python/Workspace/InfBuildData.py
@@ -788,10 +788,7 @@ class InfBuildData(ModuleBuildClassObject):
                 self._Includes.append(self._SourceOverridePath)
 
             Macros = self._Macros
-            if 'PROCESSOR' in GlobalData.gEdkGlobal.keys():
-                Macros['PROCESSOR'] = GlobalData.gEdkGlobal['PROCESSOR']
-            else:
-                Macros['PROCESSOR'] = self._Arch
+            Macros['PROCESSOR'] = GlobalData.gEdkGlobal.get('PROCESSOR', 
self._Arch)
             RecordList = self._RawData[MODEL_EFI_INCLUDE, self._Arch, 
self._Platform]
             for Record in RecordList:
                 if Record[0].find('EDK_SOURCE') > -1:
diff --git a/BaseTools/Source/Python/Workspace/MetaFileParser.py 
b/BaseTools/Source/Python/Workspace/MetaFileParser.py
index f4c1868483d9..295ffcfe62f2 100644
--- a/BaseTools/Source/Python/Workspace/MetaFileParser.py
+++ b/BaseTools/Source/Python/Workspace/MetaFileParser.py
@@ -1504,12 +1504,12 @@ class DscParser(MetaFileParser):
             # Allow using system environment variables  in path after !include
             #
             __IncludeMacros['WORKSPACE'] = 
GlobalData.gGlobalDefines['WORKSPACE']
-            if "ECP_SOURCE" in GlobalData.gGlobalDefines.keys():
+            if "ECP_SOURCE" in GlobalData.gGlobalDefines:
                 __IncludeMacros['ECP_SOURCE'] = 
GlobalData.gGlobalDefines['ECP_SOURCE']
             #
             # During GenFds phase call DSC parser, will go into this branch.
             #
-            elif "ECP_SOURCE" in GlobalData.gCommandLineDefines.keys():
+            elif "ECP_SOURCE" in GlobalData.gCommandLineDefines:
                 __IncludeMacros['ECP_SOURCE'] = 
GlobalData.gCommandLineDefines['ECP_SOURCE']
 
             __IncludeMacros['EFI_SOURCE'] = 
GlobalData.gGlobalDefines['EFI_SOURCE']
diff --git a/BaseTools/Source/Python/Workspace/WorkspaceCommon.py 
b/BaseTools/Source/Python/Workspace/WorkspaceCommon.py
index 17ac3b105431..b19dbeeafc84 100644
--- a/BaseTools/Source/Python/Workspace/WorkspaceCommon.py
+++ b/BaseTools/Source/Python/Workspace/WorkspaceCommon.py
@@ -63,11 +63,11 @@ def GetDeclaredPcd(Platform, BuildDatabase, Arch, Target, 
Toolchain,additionalPk
             PcdCName = Pcd[0]
             PcdTokenName = Pcd[1]
             if GlobalData.MixedPcd:
-                for PcdItem in GlobalData.MixedPcd.keys():
+                for PcdItem in GlobalData.MixedPcd:
                     if (PcdCName, PcdTokenName) in 
GlobalData.MixedPcd[PcdItem]:
                         PcdCName = PcdItem[0]
                         break
-            if (PcdCName, PcdTokenName) not in DecPcds.keys():
+            if (PcdCName, PcdTokenName) not in DecPcds:
                 DecPcds[PcdCName, PcdTokenName] = Pkg.Pcds[Pcd]
     return DecPcds, GuidDict
 
@@ -243,7 +243,7 @@ def _ResolveLibraryReference(Module, Platform):
         for LibraryName in M.Libraries:
             Library = Platform.LibraryClasses[LibraryName, ':dummy:']
             if Library is None:
-                for Key in Platform.LibraryClasses.data.keys():
+                for Key in Platform.LibraryClasses.data:
                     if LibraryName.upper() == Key.upper():
                         Library = Platform.LibraryClasses[Key, ':dummy:']
                         break
diff --git a/BaseTools/Source/Python/build/BuildReport.py 
b/BaseTools/Source/Python/build/BuildReport.py
index f333279a5875..635c311f1a48 100644
--- a/BaseTools/Source/Python/build/BuildReport.py
+++ b/BaseTools/Source/Python/build/BuildReport.py
@@ -838,7 +838,7 @@ class PcdReport(object):
                 for PcdItem in GlobalData.gConditionalPcds:
                     if '.' in PcdItem:
                         (TokenSpaceGuidCName, TokenCName) = PcdItem.split('.')
-                        if (TokenCName, TokenSpaceGuidCName) in 
Pa.Platform.Pcds.keys():
+                        if (TokenCName, TokenSpaceGuidCName) in 
Pa.Platform.Pcds:
                             Pcd = Pa.Platform.Pcds[(TokenCName, 
TokenSpaceGuidCName)]
                             PcdList = 
self.ConditionalPcds.setdefault(Pcd.TokenSpaceGuidCName, 
{}).setdefault(Pcd.Type, [])
                             if Pcd not in PcdList:
@@ -1043,7 +1043,7 @@ class PcdReport(object):
                             DscMatch = (DscDefaultValue.strip() == 
PcdValue.strip())
 
                     IsStructure = False
-                    if GlobalData.gStructurePcd and (self.Arch in 
GlobalData.gStructurePcd.keys()) and ((Pcd.TokenCName, Pcd.TokenSpaceGuidCName) 
in GlobalData.gStructurePcd[self.Arch]):
+                    if GlobalData.gStructurePcd and (self.Arch in 
GlobalData.gStructurePcd) and ((Pcd.TokenCName, Pcd.TokenSpaceGuidCName) in 
GlobalData.gStructurePcd[self.Arch]):
                         IsStructure = True
                         if TypeName in ('DYNVPD', 'DEXVPD'):
                             SkuInfoList = Pcd.SkuInfoList
diff --git a/BaseTools/Source/Python/build/build.py 
b/BaseTools/Source/Python/build/build.py
index 6fb2e0ed3d09..31300d8d7b4c 100644
--- a/BaseTools/Source/Python/build/build.py
+++ b/BaseTools/Source/Python/build/build.py
@@ -53,7 +53,7 @@ import Common.EdkLogger
 import Common.GlobalData as GlobalData
 from GenFds.GenFds import GenFds
 
-from collections import OrderedDict
+from collections import OrderedDict,defaultdict
 
 # Version and Copyright
 VersionNumber = "0.60" + ' ' + gBUILD_VERSION
@@ -524,8 +524,7 @@ class BuildTask:
                     BuildTask._Thread.acquire(True)
 
                     # start a new build thread
-                    Bo = BuildTask._ReadyQueue.keys()[0]
-                    Bt = BuildTask._ReadyQueue.pop(Bo)
+                    Bo,Bt = BuildTask._ReadyQueue.popitem()
 
                     # move into running queue
                     BuildTask._RunningQueueLock.acquire()
@@ -1000,7 +999,7 @@ class Build():
             GlobalData.gGlobalDefines['TOOL_CHAIN_TAG'] = self.ToolChainList[0]
         if self.ToolChainFamily:
             GlobalData.gGlobalDefines['FAMILY'] = self.ToolChainFamily[0]
-        if 'PREBUILD' in GlobalData.gCommandLineDefines.keys():
+        if 'PREBUILD' in GlobalData.gCommandLineDefines:
             self.Prebuild   = GlobalData.gCommandLineDefines.get('PREBUILD')
         else:
             self.Db.InitDatabase()
@@ -1041,7 +1040,7 @@ class Build():
             self.Prebuild += self.PassCommandOption(self.BuildTargetList, 
self.ArchList, self.ToolChainList, self.PlatformFile, self.Target)
 
     def InitPostBuild(self):
-        if 'POSTBUILD' in GlobalData.gCommandLineDefines.keys():
+        if 'POSTBUILD' in GlobalData.gCommandLineDefines:
             self.Postbuild = GlobalData.gCommandLineDefines.get('POSTBUILD')
         else:
             Platform = self.Db._MapPlatform(str(self.PlatformFile))
@@ -1524,7 +1523,7 @@ class Build():
             # First get the XIP base address for FV map file.
             GuidPattern = re.compile("[-a-fA-F0-9]+")
             GuidName = re.compile("\(GUID=[-a-fA-F0-9]+")
-            for FvName in Wa.FdfProfile.FvDict.keys():
+            for FvName in Wa.FdfProfile.FvDict:
                 FvMapBuffer = os.path.join(Wa.FvDir, FvName + '.Fv.map')
                 if not os.path.exists(FvMapBuffer):
                     continue
@@ -1963,15 +1962,14 @@ class Build():
                     self._SaveMapFile (MapBuffer, Wa)
 
     def _GenFfsCmd(self):
-        CmdListDict = {}
+        # convert dictionary of Cmd:(Inf,Arch) 
+        # to a new dictionary of (Inf,Arch):Cmd,Cmd,Cmd...
+        CmdSetDict = defaultdict(set)
         GenFfsDict = GenFds.GenFfsMakefile('', GlobalData.gFdfParser, self, 
self.ArchList, GlobalData)
         for Cmd in GenFfsDict:
             tmpInf, tmpArch = GenFfsDict[Cmd]
-            if (tmpInf, tmpArch) not in CmdListDict.keys():
-                CmdListDict[tmpInf, tmpArch] = [Cmd]
-            else:
-                CmdListDict[tmpInf, tmpArch].append(Cmd)
-        return CmdListDict
+            CmdSetDict[tmpInf, tmpArch].add(Cmd)
+        return CmdSetDict
 
     ## Build a platform in multi-thread mode
     #
-- 
2.16.2.windows.1

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