实例方法

class Bike:
    compose = ['frame','wheel','pedal']
    def use(self):
        print('you are riding')
my_bike = Bike()
my_bike.use()

you are riding

和函数 样，实例方法也是可以有参数的。

class Bike:
    compose = ['frame','wheel','pedal']
    def use(self,time):
        print('you are {}m'.format(time*100))
my_bike = Bike()
my_bike.use(10)

you are 1000m

Python 类中有一些“魔法方法”，_init＿() 方法就是其中之一。在我们创造 例的时候，不需要引用该方法 会被自动执行。

class Bike:
    compose = ['frame','wheel','pedal']
    def __init__(self):
        self.other = 'basket'
    def use(self,time):
        print('you are {}m'.format(time*100))
my_bike = Bike()
print(my_bike.other)