python中的3种定义类方法

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(f'i am {self.age} years old')

class B():

    def get_name(self, name):

        print('my name is', name)

    def get_age(self, age):

        print(f'i 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

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class C():

    @classmethod

    def get_name(cls, name):

        print(cls)  # <class '__main__.C'>

        print('my name is %s' % name)

    @classmethod

    def get_age(cls, age):

        print(f'i am %s years old' % age)

if __name__ == '__main__':

    C.get_name('tom')  # my name is tom

    C.get_age(19) # i am 19 years old

class D():

    @staticmethod

    def get_name(name):

        print('my name is %s' % name)

    @staticmethod

    def get_age(age):

        print(f'i 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