Fix deprecation warnings: invalid escape sequence (#1185)

slither/detectors/attributes/incorrect_solc.py

@@ -14,7 +14,7 @@
 # 4: version number
 
 # pylint: disable=anomalous-backslash-in-string
-PATTERN = re.compile("(\^|>|>=|<|<=)?([ ]+)?(\d+)\.(\d+)\.(\d+)")
+PATTERN = re.compile(r"(\^|>|>=|<|<=)?([ ]+)?(\d+)\.(\d+)\.(\d+)")
 
 
 class IncorrectSolc(AbstractDetector):

slither/formatters/attributes/constant_pragma.py

@@ -13,7 +13,7 @@
 # 2: version number
 # 3: version number
 # 4: version number
-PATTERN = re.compile("(\^|>|>=|<|<=)?([ ]+)?(\d+)\.(\d+)\.(\d+)")
+PATTERN = re.compile(r"(\^|>|>=|<|<=)?([ ]+)?(\d+)\.(\d+)\.(\d+)")
 
 
 def custom_format(slither, result):

slither/formatters/attributes/incorrect_solc.py

@@ -13,8 +13,7 @@
 # 3: version number
 # 4: version number
 
-# pylint: disable=anomalous-backslash-in-string
-PATTERN = re.compile("(\^|>|>=|<|<=)?([ ]+)?(\d+)\.(\d+)\.(\d+)")
+PATTERN = re.compile(r"(\^|>|>=|<|<=)?([ ]+)?(\d+)\.(\d+)\.(\d+)")
 
 
 def custom_format(slither, result):

slither/formatters/naming_convention/naming_convention.py

@@ -300,10 +300,10 @@ def _patch(compilation_unit: SlitherCompilationUnit, result, element, _target):
 # group 2: beginning of the to type
 # nested mapping are within the group 1
 # RE_MAPPING = '[ ]*mapping[ ]*\([ ]*([\=\>\(\) a-zA-Z0-9\._\[\]]*)[ ]*=>[ ]*([a-zA-Z0-9\._\[\]]*)\)'
-RE_MAPPING_FROM = b"([a-zA-Z0-9\._\[\]]*)"
-RE_MAPPING_TO = b"([\=\>\(\) a-zA-Z0-9\._\[\]\   ]*)"
+RE_MAPPING_FROM = rb"([a-zA-Z0-9\._\[\]]*)"
+RE_MAPPING_TO = rb"([\=\>\(\) a-zA-Z0-9\._\[\]\   ]*)"
 RE_MAPPING = (
-    b"[ ]*mapping[ ]*\([ ]*" + RE_MAPPING_FROM + b"[ ]*" + b"=>" + b"[ ]*" + RE_MAPPING_TO + b"\)"
+    rb"[ ]*mapping[ ]*\([ ]*" + RE_MAPPING_FROM + b"[ ]*" + b"=>" + b"[ ]*" + RE_MAPPING_TO + rb"\)"
 )
 
 

slither/solc_parsing/expressions/expression_parsing.py

@@ -445,7 +445,7 @@ def parse_expression(expression: Dict, caller_context: CallerContextExpression)
                 t = expression["attributes"]["type"]
 
         if t:
-            found = re.findall("[struct|enum|function|modifier] \(([\[\] ()a-zA-Z0-9\.,_]*)\)", t)
+            found = re.findall(r"[struct|enum|function|modifier] \(([\[\] ()a-zA-Z0-9\.,_]*)\)", t)
             assert len(found) <= 1
             if found:
                 value = value + "(" + found[0] + ")"

slither/solc_parsing/solidity_types/type_parsing.py

@@ -112,7 +112,7 @@ def _find_from_type_name(  # pylint: disable=too-many-locals,too-many-branches,t
     if not var_type:
         if name.startswith("function "):
             found = re.findall(
-                "function \(([ ()\[\]a-zA-Z0-9\.,]*?)\)(?: payable)?(?: (?:external|internal|pure|view))?(?: returns \(([a-zA-Z0-9() \.,]*)\))?",
+                r"function \(([ ()\[\]a-zA-Z0-9\.,]*?)\)(?: payable)?(?: (?:external|internal|pure|view))?(?: returns \(([a-zA-Z0-9() \.,]*)\))?",
                 name,
             )
             assert len(found) == 1
@@ -159,10 +159,10 @@ def _find_from_type_name(  # pylint: disable=too-many-locals,too-many-branches,t
         if name.startswith("mapping("):
             # nested mapping declared with var
             if name.count("mapping(") == 1:
-                found = re.findall("mapping\(([a-zA-Z0-9\.]*) => ([ a-zA-Z0-9\.\[\]]*)\)", name)
+                found = re.findall(r"mapping\(([a-zA-Z0-9\.]*) => ([ a-zA-Z0-9\.\[\]]*)\)", name)
             else:
                 found = re.findall(
-                    "mapping\(([a-zA-Z0-9\.]*) => (mapping\([=> a-zA-Z0-9\.\[\]]*\))\)",
+                    r"mapping\(([a-zA-Z0-9\.]*) => (mapping\([=> a-zA-Z0-9\.\[\]]*\))\)",
                     name,
                 )
             assert len(found) == 1

slither/tools/kspec_coverage/analysis.py

@@ -22,8 +22,8 @@ def _get_all_covered_kspec_functions(target: str) -> Set[Tuple[str, str]]:
     # Create a set of our discovered functions which are covered
     covered_functions: Set[Tuple[str, str]] = set()
 
-    BEHAVIOUR_PATTERN = re.compile("behaviour\s+(\S+)\s+of\s+(\S+)")
-    INTERFACE_PATTERN = re.compile("interface\s+([^\r\n]+)")
+    BEHAVIOUR_PATTERN = re.compile(r"behaviour\s+(\S+)\s+of\s+(\S+)")
+    INTERFACE_PATTERN = re.compile(r"interface\s+([^\r\n]+)")
 
     # Read the file contents
     with open(target, "r", encoding="utf8") as target_file: