code: def similar_text(self, *args, **kwargs):
          
          return SimilarRequest(self, *args, mode='text', **kwargs).send()
docs: Search for documents that are similar to directly supplied text or to the textual content of an existing document.
  
          Args:
              text -- Text to found something similar to.
              len -- Number of keywords to extract from the source.
              quota -- Minimum number of keywords matching in the destination.
  
          Keyword args:
              offset -- Number of results to skip before returning the following ones.
              docs -- Number of documents to retrieve. Default is 10.
              query -- An optional query that all found documents have to match against. See Search().
              See Request.__init__()
  
          Returns:
              A ListResponse object.