code: def normalize_mode(mode):
      '''
      Return a mode value, normalized to a string and containing a leading zero
      if it does not have one.
  
      Allow "keep" as a valid mode (used by file state/module to preserve mode
      from the Salt fileserver in file states).
      '''
      if mode is None:
          return None
      if not isinstance(mode, six.string_types):
          mode = six.text_type(mode)
      if six.PY3:
          mode = mode.replace('0o', '0')
      # Strip any quotes any initial zeroes, then though zero-pad it up to 4.
      # This ensures that somethign like '00644' is normalized to '0644'
      return mode.strip('"').strip('\'').lstrip('0').zfill(4f normalize_mode(mode):
      '''
      Return a mode value, normalized to a string and containing a leading zero
      if it does not have one.
  
      Allow "keep" as a valid mode (used by file state/module to preserve mode
      from the Salt fileserver in file states).
      '''
      if mode is None:
          return None
      if not isinstance(mode, six.string_types):
          mode = six.text_type(mode)
      if six.PY3:
          mode = mode.replace('0o', '0')
      # Strip any quotes any initial zeroes, then though zero-pad it up to 4.
      # This ensures that somethign like '00644' is normalized to '0644'
      return mode.strip('"').strip('\'').lstrip('0').zfill(4)
docs: Return a mode value, normalized to a string and containing a leading zero
      if it does not have one.
  
      Allow "keep" as a valid mode (used by file state/module to preserve mode
      from the Salt fileserver in file states).