Set the value of key ``name`` to ``value`` that expires in ``time_ms``
        milliseconds. ``time_ms`` can be represented by an integer or a Python
        timedelta object

def psetex(self, name, time_ms, value):
        """
        Set the value of key ``name`` to ``value`` that expires in ``time_ms``
        milliseconds. ``time_ms`` can be represented by an integer or a Python
        timedelta object
        """
        if isinstance(time_ms, datetime.timedelta):
            time_ms = int(time_ms.total_seconds() * 1000)
        return self.execute_command('PSETEX', name, time_ms, value)