How to use the _ _ call__ () method in python

This article will explain in detail how to use the _ _ call__ () method in python. The content of the article is of high quality, so the editor shares it for you as a reference. I hope you will have some understanding of the relevant knowledge after reading this article.

_ _ call__

In Python, a function is actually an object:

> f = abs > f.

Because f can be called, f is called a callable object.

All functions are callable objects.

An instance of a class can also become a callable object by implementing a special method _ _ call__ ().

We make the Person class a callable object:

Class Person (object): def _ init__ (self, name, gender): self.name = name self.gender = gender def _ call__ (self, friend): print'My name is% s..% self.name print'My friend is% s..% friend

You can now call directly on the Person instance:

> p = Person ('Bob',' male') > p ('Tim') My name is Bob...My friend is Tim...

Just looking at p ('Tim') you can't determine whether p is a function or an instance of a class, so in Python, a function is also an object, and the difference between an object and a function is not significant.

Task

Improve the Fibonacci series defined earlier:

Class Fib (object):

???

Add a _ _ call__ method to make the call easier:

> f = Fib () > > print f (10) [0, 1, 1, 2, 3, 5, 8, 13, 21, 34] about how to use the _ _ call__ () method in python is shared here. I hope the above content can be helpful to you and learn more knowledge. If you think the article is good, you can share it for more people to see.