code: def pexpireat(self, key, timestamp):
          
          if not isinstance(timestamp, int):
              raise TypeError("timestamp argument must be int, not {!r}"
                              .format(timestamp))
          fut = self.execute(b'PEXPIREAT', key, timestamp)
          return wait_convert(fut, bool)
docs: Set expire timestamp on key, timestamp in milliseconds.
  
          :raises TypeError: if timeout is not int