When creating a new instance in python, if the __init__ () method is defined in the corresponding class, it will be called automatically. You may think that the name "init" is similar to "__init__", but the computer is actually a stupid thing, and it will execute completely according to the design. Which means it was dead when it was designed. By default, new instances are created.

The following figure is a simple explanation of the __init__ () call I found in official website:

The highlighted part probably means the above. If the __init__ () method is defined in the corresponding class, the __init__ () method defined in it will be automatically called when the class instance is created.

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I hope it can help the subject. Welcome questions.