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# -*- coding:utf-8 -*-
# 类是一系列具有共同特征和行为的事物的抽象概念的总和
# 在类里面赋值的变量就是类的变量，专有术语称之为类的属性（Class Attribute）

class CocaCola:  # Class names should use CamelCase convention
    formula = ['caffeine', 'sugar', 'water', 'soda']


# 类的实例化
# 将类赋值给变量的过程称之为类的实例化，被实例化后的对象称之为实例
coke_for_me = CocaCola()  # PEP 8: E305 expected 2 blank lines after class or function definition, found 1
coke_for_you = CocaCola()

# 类属性引用
# 在类的名字后输入.后IDE自动联想类中的属性
# 类的属性会被所有类的实例共享
print(CocaCola.formula)
print(coke_for_me.formula)
print(coke_for_you.formula)

for element in coke_for_me.formula:
    print(element)

# 实例属性
coke_for_china = CocaCola()
coke_for_china.local_logo = '可口可乐'

print(coke_for_china.local_logo)

C:\Users\harveymei\PycharmProjects\mod3736\venv\Scripts\python.exe C:/Users/harveymei/PycharmProjects/mod3736/howto.py
['caffeine', 'sugar', 'water', 'soda']
['caffeine', 'sugar', 'water', 'soda']
['caffeine', 'sugar', 'water', 'soda']
caffeine
sugar
water
soda
可口可乐

Process finished with exit code 0