python中print和return的区别

return是返回值 print是打印输出
return后面的代码是不执行的

goods_dict = {

    "001": {"name": "MacBook Pro", "price": 14999},
    "002": {"name": "欧米茄手表 ", "price": 11111},
    "003": {"name": "小米笔记本 ", "price": 4999},
    "004": {"name": "Ipad mini2 ", "price": 1998},
    "005": {"name": "小米8手机  ", "price": 2998},
    "006": {"name": "爱马仕腰带 ", "price": 1999},
    "007": {"name": "劳力士男表 ", "price": 19999},
    "008": {"name": "巴宝莉眼镜 ", "price": 4999},
    "009": {"name": "路虎发现四 ", "price": 99999},
}


def num_in_goods_list(n):
    for num in goods_dict:
        if n == num:
            return True
    return False
    print("看你执行不")


print("1".center(30, "*"))
print(num_in_goods_list("001"))
print("2".center(30, "*"))
print(num_in_goods_list("uuu"))


def num_in_goods_list_1(n):
    for num in goods_dict:
        if n == num:
            print("编码存在")
    print("编码不存在")
    print("看你执行不")


print("3".center(30, "*"))
num_in_goods_list_1("001")
print("4".center(30, "*"))
num_in_goods_list_1("uuu")
# 代码执行结果
**************1***************
True
**************2***************
False
**************3***************
编码存在
编码不存在
看你执行不
**************4***************
编码不存在
看你执行不