Exploring class decorators
A class decorator is similar to the function decorator that we discussed earlier. Class decorators can be used to decorate, modify behavior, or debug a function, similar to a function decorator, which adds behavior to a function without actually modifying the function itself. A class decorator can be defined as a class by using two of its default or built-in methods: __init__ and __call__. Any variable initialized as part of the __init__ function of a class while creating an object instance of the class becomes a variable of the class itself. Similarly, the __call__ function of a class returns a function object. If we want to use a class as a decorator, we need to make use of the combination of these two built-in methods.
Let us look at what happens if we don’t use the call method. Look at the following piece of code:
class classdecorator:
def __init__(self,inputfunction):
...