code: def local_settings(settings, prefix):
      
      prefix = "{}.".format(prefix)
      new_settings = {k[len(prefix):]: v for k, v in settings.items()
                      if k.startswith(prefix)}
      return new_settings
docs: Localizes the settings for the dotted prefix.
      For example, if the prefix where 'xyz'::
  
          {'xyz.foo': 'bar', 'other': 'something'}
  
      Would become::
  
          {'foo': 'bar'}
  
      Note, that non-prefixed items are left out and the prefix is dropped.