def unsubscribe(self, name):
        name = name.upper()
        if self.subscriptions not in name:
            raise MailboxException, "Not currently subscribed to " + name
        self.subscriptions.remove(name)
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/mail/imap4.py/MemoryAccount.unsubscribe/swapped operands of `not in`