Method __setitem__

Lib/mailbox.py:67–69

Replace the keyed message; raise KeyError if it doesn't exist.

(self, key, message)

            pass

    def __setitem__(self, key, message):
        """Replace the keyed message; raise KeyError if it doesn't exist."""
        raise NotImplementedError('Method must be implemented by subclass')

    def get(self, key, default=None):
        """Return the keyed message, or default if it doesn't exist."""