🔍 Unlock the Power of __call__ in Python! 🔍

We all know about the init function in Python, but have you ever encountered the call function? 🤔 This special method can turn instances of your class into callable objects, making them act like functions!
Let's dive into an example to see this in action. 👇

class Counter:
    def __init__(self):
        self.count = 0

    def __call__(self):
        self.count += 1
        return self.count

# Create an instance of the Counter class

counter = Counter()

# Call the instance like a function
print(counter())  # Output: 1

In this code, counter() is actually calling the call method behind the scenes! 🔮 Every time we call counter(), the count increments by 1.
It is often used in libraries and books, for example, in the spaCy [1] source code and Django validators.
References
[1] spaCy source code

[2] Django validators