<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def quit(self):
 """Remove this user from all channels and reinitialize the user's list of joined channels. """

        
        for c in self.channels:
            c.users.remove(self.nick)
        self.channels = []