bpo-38347: assume all files that end on '.py' are Python scripts

Assume all files that end on '.py' are Python scripts when working
recursively.

Author: rpluem

Tools/scripts/pathfix.py

@@ -89,11 +89,8 @@ def main():
     sys.exit(bad)
 
 
-ispythonprog = re.compile(r'^[a-zA-Z0-9_-]+\.py$')
-
-
 def ispython(name):
-    return bool(ispythonprog.match(name))
+    return name.endswith('.py')
 
 
 def recursedown(dirname):