Скачать или смотреть What is self in Python?

Self is a mysterious thing when you start creating classes in Python. In this video you learn why methods have self as first parameter and how Python passes a value for it automatically when calling the method.

D E E P E R D I V E:
Take a deeper dive into self by learning how bound methods work in Python:    • How bound methods are the key to understan...  

C H A P T E R S
0:28 What is self?
0:35 Why does a method have two parameters and when you call the method you only have to pass one argument?
1:29 The instance and the arguments are packed into a method object

F R O M T H E D O C S
"If the name denotes a valid class attribute that is a function object, a method object is created by packing (pointers to) the instance object and the function object just found together in an abstract object: this is the method object. When the method object is called with an argument list, a new argument list is constructed from the instance object and the argument list, and the function object is called with this new argument list."
https://docs.python.org/3/tutorial/cl...

M Y O N L I N E T R A I N I N G
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