类的定义

对于同 款自行车而言，它们的组成结构都是一样的，如 架、 轮和脚踏板 Python 可以定义这个自行车的类：

class Bike:
    compose = ['frame','wheel','pedal']
my_bike = Bike()
you_bike = Bike()
print(my_bike.compose)
print(you_bike.compose)

['frame', 'wheel', 'pedal']

['frame', 'wheel', 'pedal']

对于同 款自行车来说，有些顾客 回去后会改造下 如加 车筐可以放东西等

class Bike:
    compose = ['frame','wheel','pedal']
my_bike = Bike()
my_bike.other = 'basket'
print(my_bike.other)

basket