extending dictionary class python
class TwoWayDict(dict):
def __delitem__(self, key):
value = super().pop(key)
super().pop(value, None)
def __setitem__(self, key, value):
if key in self:
del self[self[key]]
if value in self:
del self[value]
super().__setitem__(key, value)
super().__setitem__(value, key)
def __repr__(self):
return f"{type(self).__name__}({super().__repr__()})"