code: def partition(self, key, partitions):
          
          return partitions[(self._hash(key) & 0x7FFFFFFF) % len(partitions)]
docs: Select a partition based on the hash of the key.
  
          :param key: Partition key
          :type key: text string or UTF-8 `bytes` or `bytearray`
          :param list partitions:
              An indexed sequence of partition identifiers.
          :returns:
              One of the given partition identifiers. The result will be the same
              each time the same key and partition list is passed.