What are the methods that define classes in python

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There are three definition class methods in python:

Common method

Class method (@ classmethod)

Class method (@ classmethod)

1. Common methods

There are two ways to create a common method (class A () & class B ()).

Class A (): def _ init__ (self, name, age): self.name = name self.age = age def get_name (self): print ('my name is', self.name) def get_age (self): print (Flemi am {self.age} years old') class B (): def get_name (self, name): print ('my name is', name) def get_age (self Age): print (Flemi am {age} years old') if _ _ name__ ='_ _ main__': a = A ('tom',19) a.get_name () # my name is tom a.get_age () # I am 19 years old b = B () b.get_name (' tom') # my name is tom b.get_age (19) # I am 19 years old

In class A (), _ _ init__ () is a special method, which is equivalent to initializing A. the self in _ _ init__ is the object An itself, and name and age are their formal parameters.

The class needs to be instantiated before each method call

2. Class method

@ classmethod no longer needs self to represent itself, but uses cls instead.

There is no need to instantiate at this point. Direct class name. The function name is called.

# Python Learning Exchange Group: 725638078class C (): @ classmethod def get_name (cls, name): print (cls) # print ('my name is% s'% name) @ classmethod def get_age (cls) Age): print (Flemi am% s years old'% age) if _ _ name__ = ='_ main__': C.get_name ('tom') # my name is tom C.get_age (19) # I am 19 years old3, static method

@ staticmethod is also through the class name. Called by the function name

Static methods do not need self or cls that represent their own objects as arguments, just as they do with functions directly.

Class D (): @ staticmethod def get_name (name): print ('my name is% s'% name) @ staticmethod def get_age (age): print (Flemi am% s years old'% age) if _ _ name__ = ='_ main__': D.get_name ('tom') # my name is tom D.get_age (19) # I am 19 years old I believe that you have a deeper understanding of "what are the methods of defining classes in python?" you might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!