code: def incrbyfloat(self, key, increment):
          
          if not isinstance(increment, float):
              raise TypeError("increment must be of type int")
          fut = self.execute(b'INCRBYFLOAT', key, increment)
          return wait_convert(fut, float)
docs: Increment the float value of a key by the given amount.
  
          :raises TypeError: if increment is not int