class_docstr: Interface for locality-sensitive hashes. 
docstr: Hashes the vector and returns a list of bucket keys, that match the
  vector. Depending on the hash implementation this list can contain
  one or many bucket keys. Querying is True if this is used for
  retrieval and not indexing.
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code: def hash_vector(self, v, querying=False):
      """
      Hashes the vector and returns a list of bucket keys, that match the
      vector. Depending on the hash implementation this list can contain
      one or many bucket keys. Querying is True if this is used for
      retrieval and not indexing.
      """
      raise NotImplementedError
  
label_desc: Use image node_id 3 for calling the LSHash obj's underlying member method code with example usage: obj.hash_vector(v, querying) without return types