Method iterkeys

Lib/mailbox.py:1143–1146

Return an iterator over keys.

(self)

        return _ProxyFile(f)

    def iterkeys(self):
        """Return an iterator over keys."""
        return iter(sorted(int(entry) for entry in os.listdir(self._path)
                                      if entry.isdigit()))

    def __contains__(self, key):
        """Return True if the keyed message exists, False otherwise."""