What are functors in Python?

Can you explain what functors are in Python?

Sure! In Python, a functor is an object that can be called as if it were a function. This is typically achieved by implementing the __call__ method in a class.

Can you give me an example of a functor?

Absolutely! Here's a simple example:

class Adder:
    def __init__(self, value):
        self.value = value
    
    def __call__(self, x):
        return x + self.value

add_five = Adder(5)
print(add_five(10))  # Output: 15

What are the benefits of using functors?

Functors can help encapsulate behavior and state, making your code more modular and reusable. They also allow for cleaner syntax when passing around behavior.

Are functors commonly used in Python?

While not as common as in some other languages, functors can be useful in Python, especially in functional programming styles or when creating callback functions.