BaseTools: Fix multiple 'invalid escape sequence' warnings in tests

In Python 3.12 invalid escape sequences in strings moved from
DeprecationWarning to SyntaxWarning
(ref https://docs.python.org/3/whatsnew/changelog.html#python-3-12-0-final
and search for gh-98401). In a future Python version this will become
SyntaxError.

Multiple instances of these SyntaxWarnings are currently printed when
running the BaseTools tests using Python 3.12 (though without actually
failing the affected tests).

This commit updates all lines which were causing this type of warning.

Typical examples which needed fixing are:

- "BaseTools\Source\Python" representing a path: "\S" and "\P" are invalid
escape sequences, therefore left unchanged, therefore the test works
(with a warning in Python 3.12). r"BaseTools\Source\Python" represents
the same string, but with escapes turned off completely thus no warning.

- Where '\t\s' is used as a regex pattern, then chr(9) + '\\s' is sent
to the regex parser, with a warning in Python 3.12, since '\s' is not a
valid Python escape sequence. This works correctly, though arguably for
the wrong reasons. r'\t\s' sends the same as '\\t\\s', as originally
intended and with no warning.

(Note that ' and " are not fundamentally different in Python.)

Signed-off-by: Mike Beaton <[email protected]>

BaseTools/Source/Python/Ecc/Check.py

@@ -1092,7 +1092,7 @@ def MetaDataFileCheckModuleFileNoUse(self):
             RecordSet = EccGlobalData.gDb.TblInf.Exec(SqlCommand)
             for Record in RecordSet:
                 Path = Record[1]
-                Path = Path.upper().replace('\X64', '').replace('\IA32', '').replace('\EBC', '').replace('\IPF', '').replace('\ARM', '')
+                Path = Path.upper().replace(r'\X64', '').replace(r'\IA32', '').replace(r'\EBC', '').replace(r'\IPF', '').replace(r'\ARM', '')
                 if Path in InfPathList:
                     if not EccGlobalData.gException.IsException(ERROR_META_DATA_FILE_CHECK_MODULE_FILE_NO_USE, Record[2]):
                         EccGlobalData.gDb.TblReport.Insert(ERROR_META_DATA_FILE_CHECK_MODULE_FILE_NO_USE, OtherMsg="The source file [%s] is existing in module directory but it is not described in INF file." % (Record[2]), BelongsToTable='File', BelongsToItem=Record[0])

BaseTools/Source/Python/Ecc/Configuration.py

@@ -432,7 +432,7 @@ def ShowMe(self):
 # test that our dict and out class still match in contents.
 #
 if __name__ == '__main__':
-    myconfig = Configuration("BaseTools\Source\Python\Ecc\config.ini")
+    myconfig = Configuration(r"BaseTools\Source\Python\Ecc\config.ini")
     for each in myconfig.__dict__:
         if each == "Filename":
             continue

BaseTools/Source/Python/Ecc/MetaFileWorkspace/MetaFileParser.py

@@ -1841,14 +1841,14 @@ def _PcdParser(self):
 
         if EccGlobalData.gConfig.UniCheckPCDInfo == '1' or EccGlobalData.gConfig.UniCheckAll == '1' or EccGlobalData.gConfig.CheckAll == '1':
             # check Description, Prompt information
-            PatternDesc = re.compile('##\s*([\x21-\x7E\s]*)', re.S)
-            PatternPrompt = re.compile('#\s+@Prompt\s+([\x21-\x7E\s]*)', re.S)
+            PatternDesc = re.compile(r'##\s*([\x21-\x7E\s]*)', re.S)
+            PatternPrompt = re.compile(r'#\s+@Prompt\s+([\x21-\x7E\s]*)', re.S)
             Description = None
             Prompt = None
             # check @ValidRange, @ValidList and @Expression format valid
             ErrorCodeValid = '0x0 <= %s <= 0xFFFFFFFF'
-            PatternValidRangeIn = '(NOT)?\s*(\d+\s*-\s*\d+|0[xX][a-fA-F0-9]+\s*-\s*0[xX][a-fA-F0-9]+|LT\s*\d+|LT\s*0[xX][a-fA-F0-9]+|GT\s*\d+|GT\s*0[xX][a-fA-F0-9]+|LE\s*\d+|LE\s*0[xX][a-fA-F0-9]+|GE\s*\d+|GE\s*0[xX][a-fA-F0-9]+|XOR\s*\d+|XOR\s*0[xX][a-fA-F0-9]+|EQ\s*\d+|EQ\s*0[xX][a-fA-F0-9]+)'
-            PatternValidRng = re.compile('^' + '(NOT)?\s*' + PatternValidRangeIn + '$')
+            PatternValidRangeIn = r'(NOT)?\s*(\d+\s*-\s*\d+|0[xX][a-fA-F0-9]+\s*-\s*0[xX][a-fA-F0-9]+|LT\s*\d+|LT\s*0[xX][a-fA-F0-9]+|GT\s*\d+|GT\s*0[xX][a-fA-F0-9]+|LE\s*\d+|LE\s*0[xX][a-fA-F0-9]+|GE\s*\d+|GE\s*0[xX][a-fA-F0-9]+|XOR\s*\d+|XOR\s*0[xX][a-fA-F0-9]+|EQ\s*\d+|EQ\s*0[xX][a-fA-F0-9]+)'
+            PatternValidRng = re.compile('^' + r'(NOT)?\s*' + PatternValidRangeIn + '$')
             for Comment in self._Comments:
                 Comm = Comment[0].strip()
                 if not Comm:
@@ -2071,7 +2071,7 @@ def Start(self):
     def CheckKeyValid(self, Key, Contents=None):
         if not Contents:
             Contents = self.FileIn
-        KeyPattern = re.compile('#string\s+%s\s+.*?#language.*?".*?"' % Key, re.S)
+        KeyPattern = re.compile(r'#string\s+%s\s+.*?#language.*?".*?"' % Key, re.S)
         if KeyPattern.search(Contents):
             return True
         return False

BaseTools/Source/Python/Ecc/c.py

@@ -43,7 +43,7 @@ def GetArrayPattern():
     return p
 
 def GetTypedefFuncPointerPattern():
-    p = re.compile('[_\w\s]*\([\w\s]*\*+\s*[_\w]+\s*\)\s*\(.*\)', re.DOTALL)
+    p = re.compile(r'[_\w\s]*\([\w\s]*\*+\s*[_\w]+\s*\)\s*\(.*\)', re.DOTALL)
     return p
 
 def GetDB():

BaseTools/Source/Python/Eot/EotGlobalData.py

@@ -11,7 +11,7 @@
 gEFI_SOURCE = ''
 gEDK_SOURCE = ''
 gWORKSPACE = ''
-gSHELL_INF = 'Application\Shell'
+gSHELL_INF = r'Application\Shell'
 gMAKE_FILE = ''
 gDSC_FILE = ''
 gFV_FILE = []

BaseTools/Source/Python/Eot/c.py

@@ -54,7 +54,7 @@ def GetArrayPattern():
 #  @return p:    the pattern of function pointer
 #
 def GetTypedefFuncPointerPattern():
-    p = re.compile('[_\w\s]*\([\w\s]*\*+\s*[_\w]+\s*\)\s*\(.*\)', re.DOTALL)
+    p = re.compile(r'[_\w\s]*\([\w\s]*\*+\s*[_\w]+\s*\)\s*\(.*\)', re.DOTALL)
     return p
 
 ## GetDB() method

BaseTools/Source/Python/UPT/Library/CommentParsing.py

@@ -238,7 +238,7 @@ def ParseDecPcdGenericComment (GenericComment, ContainerFile, TokenSpaceGuidCNam
         #
         # To replace Macro
         #
-        MACRO_PATTERN = '[\t\s]*\$\([A-Z][_A-Z0-9]*\)'
+        MACRO_PATTERN = r'[\t\s]*\$\([A-Z][_A-Z0-9]*\)'
         MatchedStrs =  re.findall(MACRO_PATTERN, Comment)
         for MatchedStr in MatchedStrs:
             if MatchedStr:

BaseTools/Source/Python/UPT/Library/ExpressionValidate.py

@@ -66,13 +66,13 @@ def __init__(self, Error = ''):
 ## _ExprBase
 #
 class _ExprBase:
-    HEX_PATTERN = '[\t\s]*0[xX][a-fA-F0-9]+'
-    INT_PATTERN = '[\t\s]*[0-9]+'
-    MACRO_PATTERN = '[\t\s]*\$\(([A-Z][_A-Z0-9]*)\)'
+    HEX_PATTERN = r'[\t\s]*0[xX][a-fA-F0-9]+'
+    INT_PATTERN = r'[\t\s]*[0-9]+'
+    MACRO_PATTERN = r'[\t\s]*\$\(([A-Z][_A-Z0-9]*)\)'
     PCD_PATTERN = \
-    '[\t\s]*[_a-zA-Z][a-zA-Z0-9_]*[\t\s]*\.[\t\s]*[_a-zA-Z][a-zA-Z0-9_]*'
-    QUOTED_PATTERN = '[\t\s]*L?"[^"]*"'
-    BOOL_PATTERN = '[\t\s]*(true|True|TRUE|false|False|FALSE)'
+    r'[\t\s]*[_a-zA-Z][a-zA-Z0-9_]*[\t\s]*\.[\t\s]*[_a-zA-Z][a-zA-Z0-9_]*'
+    QUOTED_PATTERN = r'[\t\s]*L?"[^"]*"'
+    BOOL_PATTERN = r'[\t\s]*(true|True|TRUE|false|False|FALSE)'
     def __init__(self, Token):
         self.Token = Token
         self.Index = 0
@@ -303,9 +303,9 @@ def IsValidLogicalExpression(self):
 ## _ValidRangeExpressionParser
 #
 class _ValidRangeExpressionParser(_ExprBase):
-    INT_RANGE_PATTERN = '[\t\s]*[0-9]+[\t\s]*-[\t\s]*[0-9]+'
+    INT_RANGE_PATTERN = r'[\t\s]*[0-9]+[\t\s]*-[\t\s]*[0-9]+'
     HEX_RANGE_PATTERN = \
-        '[\t\s]*0[xX][a-fA-F0-9]+[\t\s]*-[\t\s]*0[xX][a-fA-F0-9]+'
+        r'[\t\s]*0[xX][a-fA-F0-9]+[\t\s]*-[\t\s]*0[xX][a-fA-F0-9]+'
     def __init__(self, Token):
         _ExprBase.__init__(self, Token)
         self.Parens = 0
@@ -407,7 +407,7 @@ def ValidRange(self):
 ## _ValidListExpressionParser
 #
 class _ValidListExpressionParser(_ExprBase):
-    VALID_LIST_PATTERN = '(0[xX][0-9a-fA-F]+|[0-9]+)([\t\s]*,[\t\s]*(0[xX][0-9a-fA-F]+|[0-9]+))*'
+    VALID_LIST_PATTERN = r'(0[xX][0-9a-fA-F]+|[0-9]+)([\t\s]*,[\t\s]*(0[xX][0-9a-fA-F]+|[0-9]+))*'
     def __init__(self, Token):
         _ExprBase.__init__(self, Token)
         self.NUM = 1

BaseTools/Source/Python/UPT/Library/Misc.py

@@ -69,11 +69,11 @@ def GuidStringToGuidStructureString(Guid):
 def CheckGuidRegFormat(GuidValue):
     ## Regular expression used to find out register format of GUID
     #
-    RegFormatGuidPattern = re.compile("^\s*([0-9a-fA-F]){8}-"
+    RegFormatGuidPattern = re.compile(r"^\s*([0-9a-fA-F]){8}-"
                                        "([0-9a-fA-F]){4}-"
                                        "([0-9a-fA-F]){4}-"
                                        "([0-9a-fA-F]){4}-"
-                                       "([0-9a-fA-F]){12}\s*$")
+                                       r"([0-9a-fA-F]){12}\s*$")
 
     if RegFormatGuidPattern.match(GuidValue):
         return True
@@ -837,8 +837,8 @@ def GetLibInstanceInfo(String, WorkSpace, LineNo):
                          ST.ERR_FILE_OPEN_FAILURE,
                          File=FullFileName)
 
-        ReFileGuidPattern = re.compile("^\s*FILE_GUID\s*=.*$")
-        ReVerStringPattern = re.compile("^\s*VERSION_STRING\s*=.*$")
+        ReFileGuidPattern = re.compile(r"^\s*FILE_GUID\s*=.*$")
+        ReVerStringPattern = re.compile(r"^\s*VERSION_STRING\s*=.*$")
 
         FileLinesList = ProcessLineExtender(FileLinesList)
 
@@ -978,7 +978,7 @@ def ValidateUNIFilePath(Path):
     #
     # Check if the file name is valid according to the DEC and INF specification
     #
-    Pattern = '[a-zA-Z0-9_][a-zA-Z0-9_\-\.]*'
+    Pattern = r'[a-zA-Z0-9_][a-zA-Z0-9_\-\.]*'
     FileName = Path.replace(Suffix, '')
     InvalidCh = re.sub(Pattern, '', FileName)
     if InvalidCh:

BaseTools/Source/Python/UPT/Library/StringUtils.py

@@ -23,7 +23,7 @@
 #
 # Regular expression for matching macro used in DSC/DEC/INF file inclusion
 #
-gMACRO_PATTERN = re.compile("\$\(([_A-Z][_A-Z0-9]*)\)", re.UNICODE)
+gMACRO_PATTERN = re.compile(r"\$\(([_A-Z][_A-Z0-9]*)\)", re.UNICODE)
 
 ## GetSplitValueList
 #

BaseTools/Source/Python/UPT/Parser/DecParserMisc.py

@@ -25,7 +25,7 @@
 from Library.Misc import CheckGuidRegFormat
 
 TOOL_NAME = 'DecParser'
-VERSION_PATTERN = '[0-9]+(\.[0-9]+)?'
+VERSION_PATTERN = r'[0-9]+(\.[0-9]+)?'
 CVAR_PATTERN = '[_a-zA-Z][a-zA-Z0-9_]*'
 PCD_TOKEN_PATTERN = '(0[xX]0*[a-fA-F0-9]{1,8})|([0-9]+)'
 MACRO_PATTERN = '[A-Z][_A-Z0-9]*'

BaseTools/Source/Python/UPT/Parser/InfAsBuiltProcess.py

@@ -53,12 +53,12 @@ def GetLibInstanceInfo(String, WorkSpace, LineNo, CurrentInfFileName):
     #
     # To deal with library instance specified by GUID and version
     #
-    RegFormatGuidPattern = re.compile("\s*([0-9a-fA-F]){8}-"
+    RegFormatGuidPattern = re.compile(r"\s*([0-9a-fA-F]){8}-"
                                        "([0-9a-fA-F]){4}-"
                                        "([0-9a-fA-F]){4}-"
                                        "([0-9a-fA-F]){4}-"
-                                       "([0-9a-fA-F]){12}\s*")
-    VersionPattern = re.compile('[\t\s]*\d+(\.\d+)?[\t\s]*')
+                                       r"([0-9a-fA-F]){12}\s*")
+    VersionPattern = re.compile(r'[\t\s]*\d+(\.\d+)?[\t\s]*')
     GuidMatchedObj = RegFormatGuidPattern.search(String)
 
     if String.upper().startswith('GUID') and GuidMatchedObj and 'Version' in String:
@@ -75,8 +75,8 @@ def GetLibInstanceInfo(String, WorkSpace, LineNo, CurrentInfFileName):
     FileLinesList = GetFileLineContent(String, WorkSpace, LineNo, OriginalString)
 
 
-    ReFindFileGuidPattern = re.compile("^\s*FILE_GUID\s*=.*$")
-    ReFindVerStringPattern = re.compile("^\s*VERSION_STRING\s*=.*$")
+    ReFindFileGuidPattern = re.compile(r"^\s*FILE_GUID\s*=.*$")
+    ReFindVerStringPattern = re.compile(r"^\s*VERSION_STRING\s*=.*$")
 
     for Line in FileLinesList:
         if ReFindFileGuidPattern.match(Line):
@@ -106,8 +106,8 @@ def GetPackageListInfo(FileNameString, WorkSpace, LineNo):
 
     FileLinesList = GetFileLineContent(FileNameString, WorkSpace, LineNo, '')
 
-    RePackageHeader = re.compile('^\s*\[Packages.*\].*$')
-    ReDefineHeader = re.compile('^\s*\[Defines].*$')
+    RePackageHeader = re.compile(r'^\s*\[Packages.*\].*$')
+    ReDefineHeader = re.compile(r'^\s*\[Defines].*$')
 
     PackageHederFlag = False
     DefineHeaderFlag = False
@@ -255,8 +255,8 @@ def GetGuidVerFormLibInstance(Guid, Version, WorkSpace, CurrentInfFileName):
             FileLinesList = InfFileObj.readlines()
             FileLinesList = ProcessLineExtender(FileLinesList)
 
-            ReFindFileGuidPattern = re.compile("^\s*FILE_GUID\s*=.*$")
-            ReFindVerStringPattern = re.compile("^\s*VERSION_STRING\s*=.*$")
+            ReFindFileGuidPattern = re.compile(r"^\s*FILE_GUID\s*=.*$")
+            ReFindVerStringPattern = re.compile(r"^\s*VERSION_STRING\s*=.*$")
 
             for Line in FileLinesList:
                 if ReFindFileGuidPattern.match(Line):

BaseTools/Source/Python/UPT/Parser/InfDefineSectionParser.py

@@ -40,7 +40,7 @@ def GetValidateArchList(LineContent):
 
         TempArch = GetSplitValueList(TempArch, '(', 1)[0]
 
-        ArchList = re.split('\s+', TempArch)
+        ArchList = re.split(r'\s+', TempArch)
         NewArchList = []
         for Arch in ArchList:
             if IsValidArch(Arch):

BaseTools/Source/Python/UPT/Parser/InfParserMisc.py

@@ -109,7 +109,7 @@ def InfExpandMacro(Content, LineInfo, GlobalMacros=None, SectionMacros=None, Fla
         return Content
     else:
         for Macro in MacroUsed:
-            gQuotedMacro = re.compile(".*\".*\$\(%s\).*\".*"%(Macro))
+            gQuotedMacro = re.compile(r".*\".*\$\(%s\).*\".*"%(Macro))
             if not gQuotedMacro.match(Content):
                 #
                 # Still have MACROs can't be expanded.
@@ -130,8 +130,8 @@ def IsBinaryInf(FileLineList):
     if not FileLineList:
         return False
 
-    ReIsSourcesSection = re.compile("^\s*\[Sources.*\]\s.*$", re.IGNORECASE)
-    ReIsBinarySection = re.compile("^\s*\[Binaries.*\]\s.*$", re.IGNORECASE)
+    ReIsSourcesSection = re.compile(r"^\s*\[Sources.*\]\s.*$", re.IGNORECASE)
+    ReIsBinarySection = re.compile(r"^\s*\[Binaries.*\]\s.*$", re.IGNORECASE)
     BinarySectionFoundFlag = False
 
     for Line in FileLineList:
@@ -155,7 +155,7 @@ def IsBinaryInf(FileLineList):
 # @return Flag
 #
 def IsLibInstanceInfo(String):
-    ReIsLibInstance = re.compile("^\s*##\s*@LIB_INSTANCES\s*$")
+    ReIsLibInstance = re.compile(r"^\s*##\s*@LIB_INSTANCES\s*$")
     if ReIsLibInstance.match(String):
         return True
     else:
@@ -171,7 +171,7 @@ def IsLibInstanceInfo(String):
 # @return Flag
 #
 def IsAsBuildOptionInfo(String):
-    ReIsAsBuildInstance = re.compile("^\s*##\s*@AsBuilt\s*$")
+    ReIsAsBuildInstance = re.compile(r"^\s*##\s*@AsBuilt\s*$")
     if ReIsAsBuildInstance.match(String):
         return True
     else:

BaseTools/Source/Python/UPT/PomAdapter/DecPomAlignment.py

@@ -747,12 +747,12 @@ def ReplaceForEval(self, ReplaceValue, IsRange=False, IsExpr=False):
         #
         # deal with "NOT EQ", "NOT LT", "NOT GT", "NOT LE", "NOT GE", "NOT NOT"
         #
-        NOTNOT_Pattern = '[\t\s]*NOT[\t\s]+NOT[\t\s]*'
-        NOTGE_Pattern = '[\t\s]*NOT[\t\s]+GE[\t\s]*'
-        NOTLE_Pattern = '[\t\s]*NOT[\t\s]+LE[\t\s]*'
-        NOTGT_Pattern = '[\t\s]*NOT[\t\s]+GT[\t\s]*'
-        NOTLT_Pattern = '[\t\s]*NOT[\t\s]+LT[\t\s]*'
-        NOTEQ_Pattern = '[\t\s]*NOT[\t\s]+EQ[\t\s]*'
+        NOTNOT_Pattern = r'[\t\s]*NOT[\t\s]+NOT[\t\s]*'
+        NOTGE_Pattern = r'[\t\s]*NOT[\t\s]+GE[\t\s]*'
+        NOTLE_Pattern = r'[\t\s]*NOT[\t\s]+LE[\t\s]*'
+        NOTGT_Pattern = r'[\t\s]*NOT[\t\s]+GT[\t\s]*'
+        NOTLT_Pattern = r'[\t\s]*NOT[\t\s]+LT[\t\s]*'
+        NOTEQ_Pattern = r'[\t\s]*NOT[\t\s]+EQ[\t\s]*'
         ReplaceValue = re.compile(NOTNOT_Pattern).sub('', ReplaceValue)
         ReplaceValue = re.compile(NOTLT_Pattern).sub('x >= ', ReplaceValue)
         ReplaceValue = re.compile(NOTGT_Pattern).sub('x <= ', ReplaceValue)
@@ -785,7 +785,7 @@ def ReplaceForEval(self, ReplaceValue, IsRange=False, IsExpr=False):
         if ReplaceValue.find('!') >= 0 and ReplaceValue[ReplaceValue.index('!') + 1] != '=':
             ReplaceValue = ReplaceValue.replace('!', ' not ')
         if '.' in ReplaceValue:
-            Pattern = '[a-zA-Z0-9]{1,}\.[a-zA-Z0-9]{1,}'
+            Pattern = r'[a-zA-Z0-9]{1,}\.[a-zA-Z0-9]{1,}'
             MatchedList = re.findall(Pattern, ReplaceValue)
             for MatchedItem in MatchedList:
                 if MatchedItem not in self.PcdDefaultValueDict:
@@ -814,7 +814,7 @@ def CheckPcdValue(self):
                     #
                     # Delete the 'L' prefix of a quoted string, this operation is for eval()
                     #
-                    QUOTED_PATTERN = '[\t\s]*L?"[^"]*"'
+                    QUOTED_PATTERN = r'[\t\s]*L?"[^"]*"'
                     QuotedMatchedObj = re.search(QUOTED_PATTERN, Expression)
                     if QuotedMatchedObj:
                         MatchedStr = QuotedMatchedObj.group().strip()
@@ -847,7 +847,7 @@ def CheckPcdValue(self):
             #
             # Delete the 'L' prefix of a quoted string, this operation is for eval()
             #
-            QUOTED_PATTERN = '[\t\s]*L?"[^"]*"'
+            QUOTED_PATTERN = r'[\t\s]*L?"[^"]*"'
             QuotedMatchedObj = re.search(QUOTED_PATTERN, DefaultValue)
             if QuotedMatchedObj:
                 MatchedStr = QuotedMatchedObj.group().strip()

BaseTools/Source/Python/UPT/Xml/IniToXml.py

@@ -200,9 +200,9 @@ def ValidateRegValues(Key, Value):
             ('[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}'
             '-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}',
             ST.ERR_GUID_VALUE % Value),
-        'Version'   :   ('[0-9]+(\.[0-9]+)?', ST.ERR_VERSION_VALUE % \
+        'Version'   :   (r'[0-9]+(\.[0-9]+)?', ST.ERR_VERSION_VALUE % \
                          (Key, Value)),
-        'XmlSpecification' : ('1\.1', ST.ERR_VERSION_XMLSPEC % Value)
+        'XmlSpecification' : (r'1\.1', ST.ERR_VERSION_XMLSPEC % Value)
     }
     if Key not in ValidateMap:
         return True, ''

BaseTools/Source/Python/UPT/Xml/PcdXml.py

@@ -100,11 +100,11 @@ def ToXml(self, PcdError, Key):
     def TransferValidRange2Expr(self, TokenSpaceGuidCName, CName, ValidRange):
         if self.Expression:
             pass
-        INT_RANGE_PATTERN1 = '[\t\s]*[0-9]+[\t\s]*-[\t\s]*[0-9]+'
-        INT_RANGE_PATTERN2 = '[\t\s]*(LT|GT|LE|GE|XOR|EQ)[\t\s]+\d+[\t\s]*'
+        INT_RANGE_PATTERN1 = r'[\t\s]*[0-9]+[\t\s]*-[\t\s]*[0-9]+'
+        INT_RANGE_PATTERN2 = r'[\t\s]*(LT|GT|LE|GE|XOR|EQ)[\t\s]+\d+[\t\s]*'
         HEX_RANGE_PATTERN1 = \
-            '[\t\s]*0[xX][a-fA-F0-9]+[\t\s]*-[\t\s]*0[xX][a-fA-F0-9]+'
-        HEX_RANGE_PATTERN2 = '[\t\s]*(LT|GT|LE|GE|XOR|EQ)[\t\s]+0[xX][a-fA-F0-9]+[\t\s]*'
+            r'[\t\s]*0[xX][a-fA-F0-9]+[\t\s]*-[\t\s]*0[xX][a-fA-F0-9]+'
+        HEX_RANGE_PATTERN2 = r'[\t\s]*(LT|GT|LE|GE|XOR|EQ)[\t\s]+0[xX][a-fA-F0-9]+[\t\s]*'
         IntMatch1 = re.compile(INT_RANGE_PATTERN1)
         IntMatch2 = re.compile(INT_RANGE_PATTERN2)
         HexMatch1 = re.compile(HEX_RANGE_PATTERN1)
@@ -158,18 +158,18 @@ def TransferValidEpxr2ValidRange(self, ValidRangeExpr):
             pass
 
         PCD_PATTERN = \
-        '[\t\s]*[_a-zA-Z][a-zA-Z0-9_]*[\t\s]*\.[\t\s]*[_a-zA-Z][a-zA-Z0-9_]*[\t\s]*'
+        r'[\t\s]*[_a-zA-Z][a-zA-Z0-9_]*[\t\s]*\.[\t\s]*[_a-zA-Z][a-zA-Z0-9_]*[\t\s]*'
         IntPattern1 = \
-        '[\t\s]*\([\t\s]*'+PCD_PATTERN+'[\t\s]+GE[\t\s]+\d+[\t\s]*\)[\t\s]+AND[\t\s]+\([\t\s]*'+\
-        PCD_PATTERN+'[\t\s]+LE[\t\s]+\d+[\t\s]*\)'
+        r'[\t\s]*\([\t\s]*'+PCD_PATTERN+r'[\t\s]+GE[\t\s]+\d+[\t\s]*\)[\t\s]+AND[\t\s]+\([\t\s]*'+\
+        PCD_PATTERN+r'[\t\s]+LE[\t\s]+\d+[\t\s]*\)'
         IntPattern1 = IntPattern1.replace(' ', '')
-        IntPattern2 = '[\t\s]*'+PCD_PATTERN+'[\t\s]+(LT|GT|LE|GE|XOR|EQ)[\t\s]+\d+[\t\s]*'
+        IntPattern2 = r'[\t\s]*'+PCD_PATTERN+r'[\t\s]+(LT|GT|LE|GE|XOR|EQ)[\t\s]+\d+[\t\s]*'
 
         HexPattern1 = \
-        '[\t\s]*\([\t\s]*'+PCD_PATTERN+'[\t\s]+GE[\t\s]+0[xX][0-9a-fA-F]+[\t\s]*\)[\t\s]+AND[\t\s]+\([\t\s]*'+\
-        PCD_PATTERN+'[\t\s]+LE[\t\s]+0[xX][0-9a-fA-F]+[\t\s]*\)'
+        r'[\t\s]*\([\t\s]*'+PCD_PATTERN+r'[\t\s]+GE[\t\s]+0[xX][0-9a-fA-F]+[\t\s]*\)[\t\s]+AND[\t\s]+\([\t\s]*'+\
+        PCD_PATTERN+r'[\t\s]+LE[\t\s]+0[xX][0-9a-fA-F]+[\t\s]*\)'
         HexPattern1 = HexPattern1.replace(' ', '')
-        HexPattern2 = '[\t\s]*'+PCD_PATTERN+'[\t\s]+(LT|GT|LE|GE|XOR|EQ)[\t\s]+0[xX][0-9a-zA-Z]+[\t\s]*'
+        HexPattern2 = r'[\t\s]*'+PCD_PATTERN+r'[\t\s]+(LT|GT|LE|GE|XOR|EQ)[\t\s]+0[xX][0-9a-zA-Z]+[\t\s]*'
 
         #
         # Do the Hex1 conversion
@@ -180,7 +180,7 @@ def TransferValidEpxr2ValidRange(self, ValidRangeExpr):
             #
             # To match items on both sides of '-'
             #
-            RangeItemList = re.compile('[\t\s]*0[xX][0-9a-fA-F]+[\t\s]*').findall(HexMatchedItem)
+            RangeItemList = re.compile(r'[\t\s]*0[xX][0-9a-fA-F]+[\t\s]*').findall(HexMatchedItem)
             if RangeItemList and len(RangeItemList) == 2:
                 HexRangeDict[HexMatchedItem] = RangeItemList
 
@@ -204,7 +204,7 @@ def TransferValidEpxr2ValidRange(self, ValidRangeExpr):
             #
             # To match items on both sides of '-'
             #
-            RangeItemList = re.compile('[\t\s]*\d+[\t\s]*').findall(MatchedItem)
+            RangeItemList = re.compile(r'[\t\s]*\d+[\t\s]*').findall(MatchedItem)
             if RangeItemList and len(RangeItemList) == 2:
                 IntRangeDict[MatchedItem] = RangeItemList