Ignore pylint warnings for the older pep257 code

scripts/run_checks.py

@@ -107,8 +107,11 @@ def check_pep257(target):
         sys.argv += args
     try:
         if hasattr(pep257, 'run_pep257'):
+            # newer pep257 versions
             status = pep257.run_pep257()
         else:
+            # older pep257 versions
+            # pylint: disable=assignment-from-no-return,no-member
             status = pep257.main(*pep257.parse_options())
         print()
         return status