extending dictionary class python

1class TwoWayDict(dict):
2    def __delitem__(self, key):
3        value = super().pop(key)
4        super().pop(value, None)
5    def __setitem__(self, key, value):
6        if key in self:
7            del self[self[key]]
8        if value in self:
9            del self[value]
10        super().__setitem__(key, value)
11        super().__setitem__(value, key)
12    def __repr__(self):
13        return f"{type(self).__name__}({super().__repr__()})"
14