code: def filter_from_options(key, options):
      
      return anyconfig.utils.filter_options([k for k in options.keys()
                                             if k != key], options)
docs: :param key: Key str in options
      :param options: Mapping object
      :return:
          New mapping object from 'options' in which the item with 'key' filtered
  
      >>> filter_from_options('a', dict(a=1, b=2))
      {'b': 2}