Changing an attribute of a frozen class in attrs
Solution 1:
Changing the passed-in value is what a converter is for:
url = attr.ib(type=str, converter=lambda x: 'mango' if x=='apple' else x)
Changing the passed-in value is what a converter is for:
url = attr.ib(type=str, converter=lambda x: 'mango' if x=='apple' else x)