def get_other_keys(self, key, including_current=False):
other_keys = []<EOL>if key in self:<EOL><INDENT>other_keys.extend(self.__dict__[str(type(key))][key])<EOL>if not including_current:<EOL><INDENT>other_keys.remove(key)<EOL><DEDENT><DEDENT>return other_keys<EOL>
Returns list of other keys that are mapped to the same value as specified key. 
            @param key - key for which other keys should be returned.
            @param including_current if set to True - key will also appear on this list.