<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def set_position(self, pos):
 """Seek in the current playing media."""

        time_in_ms = int(pos)*1000
        return self.apple_tv.set_property('dacp.playingtime', time_in_ms)