1 files changed, 4 insertions, 4 deletions
diff --git a/BaseTools/Source/Python/UPT/Library/String.py b/BaseTools/Source/Python/UPT/Library/String.py
index 278073e4a3..b79891ea14 100644
--- a/BaseTools/Source/Python/UPT/Library/String.py
+++ b/BaseTools/Source/Python/UPT/Library/String.py
@@ -166,7 +166,7 @@ def SplitModuleType(Key):
 #
 def ReplaceMacro(String, MacroDefinitions=None, SelfReplacement=False, Line=None, FileName=None, Flag=False):
     LastString = String
-    if MacroDefinitions == None:
+    if MacroDefinitions is None:
         MacroDefinitions = {}
     while MacroDefinitions:
         QuotedStringList = []
@@ -244,7 +244,7 @@ def ReplaceMacro(String, MacroDefinitions=None, SelfReplacement=False, Line=None
 #
 def NormPath(Path, Defines=None):
     IsRelativePath = False
-    if Defines == None:
+    if Defines is None:
         Defines = {}
     if Path:
         if Path[0] == '.':
@@ -524,7 +524,7 @@ def PreCheck(FileName, FileContent, SupSectionTag):
 #                            to be checked
 #
 def CheckFileType(CheckFilename, ExtName, ContainerFilename, SectionName, Line, LineNo= -1):
-    if CheckFilename != '' and CheckFilename != None:
+    if CheckFilename != '' and CheckFilename is not None:
         (Root, Ext) = os.path.splitext(CheckFilename)
         if Ext.upper() != ExtName.upper() and Root:
             ContainerFile = open(ContainerFilename, 'r').read()
@@ -552,7 +552,7 @@ def CheckFileType(CheckFilename, ExtName, ContainerFilename, SectionName, Line,
 #
 def CheckFileExist(WorkspaceDir, CheckFilename, ContainerFilename, SectionName, Line, LineNo= -1):
     CheckFile = ''
-    if CheckFilename != '' and CheckFilename != None:
+    if CheckFilename != '' and CheckFilename is not None:
         CheckFile = WorkspaceFile(WorkspaceDir, CheckFilename)
         if not os.path.isfile(CheckFile):
             ContainerFile = open(ContainerFilename, 'r').read()