def psetex(self, name: KeyT, time_ms: ExpiryT, value: EncodableT) -> Awaitable:
        """
        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)

        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
        
aioredis/client.py