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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def read_pid_constants(self):
 """Reads back the PID constants stored on the Grizzly."""

        p = self._read_as_int(Addr.PConstant, 4)
        i = self._read_as_int(Addr.IConstant, 4)
        d = self._read_as_int(Addr.DConstant, 4)
        
        return map(lambda x: x / (2 ** 16), (p, i, d))