fix regexes with escape sequence (#17943)

src/transformers/dynamic_module_utils.py

@@ -78,9 +78,9 @@ def get_relative_imports(module_file):
         content = f.read()
 
     # Imports of the form `import .xxx`
-    relative_imports = re.findall("^\s*import\s+\.(\S+)\s*$", content, flags=re.MULTILINE)
+    relative_imports = re.findall(r"^\s*import\s+\.(\S+)\s*$", content, flags=re.MULTILINE)
     # Imports of the form `from .xxx import yyy`
-    relative_imports += re.findall("^\s*from\s+\.(\S+)\s+import", content, flags=re.MULTILINE)
+    relative_imports += re.findall(r"^\s*from\s+\.(\S+)\s+import", content, flags=re.MULTILINE)
     # Unique-ify
     return list(set(relative_imports))
 
@@ -122,9 +122,9 @@ def check_imports(filename):
         content = f.read()
 
     # Imports of the form `import xxx`
-    imports = re.findall("^\s*import\s+(\S+)\s*$", content, flags=re.MULTILINE)
+    imports = re.findall(r"^\s*import\s+(\S+)\s*$", content, flags=re.MULTILINE)
     # Imports of the form `from xxx import yyy`
-    imports += re.findall("^\s*from\s+(\S+)\s+import", content, flags=re.MULTILINE)
+    imports += re.findall(r"^\s*from\s+(\S+)\s+import", content, flags=re.MULTILINE)
     # Only keep the top-level module
     imports = [imp.split(".")[0] for imp in imports if not imp.startswith(".")]
 

src/transformers/modeling_utils.py

@@ -219,7 +219,7 @@ def dtype_byte_size(dtype):
     """
     if dtype == torch.bool:
         return 1 / 8
-    bit_search = re.search("[^\d](\d+)$", str(dtype))
+    bit_search = re.search(r"[^\d](\d+)$", str(dtype))
     if bit_search is None:
         raise ValueError(f"`dtype` is not a valid dtype: {dtype}.")
     bit_size = int(bit_search.groups()[0])