+ elif pieces[1] == "NICK":
+ oldnick = pieces[0].split('!')[0][1:]
+ newnick = pieces[2][1:]
+ if newnick.lower() != oldnick.lower():
+ self.parent.users[newnick.lower()] = self.parent.users[oldnick.lower()]
+ del self.parent.users[oldnick.lower()]
+ self.parent.users[newnick.lower()].nickchange(newnick)
+