<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def getrawpartid(self, msgid, partid, stream=sys.stdout):
 """Get a specific part from the message and print it raw. """

        parts = [part for hdr,part in self._get(msgid)]
        part = parts[int(partid)]
        pl = part.get_payload(decode=True)
        if pl != None:
            print(pl, file=stream)