如果为True:？，则无法启动输入命令？。重要性和替代品，如果是真的：？

Question

我在学Python3。前进，但输入命令困惑我，因为他们不启动自己？除了谷歌和youtube，我没有接受过这方面的正规教育。我知道我缺少一些基本的东西。你知道吗

我在www上看过了。请详细解释一下好吗？你知道吗

def take_input():
    print (" ")
    city = input("which city do you wish to travel to? \n Options are: delhi, kolkata, bombay, bengaluru : ")
    city.lower()
    print (" ")
    days = int(input("How many days are you travelling for? eg 1 - 100 : ")) 
    nights = days - 1
    print (" ")
    spending_money = int(input("How much spending money do you plan on carrying?, eg 100 - 10000 : "))
    return city, days, spending_money , trip_cost(city, days, spending_money)


# trying to collect user data


#remaining code removed for minimal reproducible question :)


while True: 
    take_input()

Answer 1

while True是Python的基础。 意思是“永远这样”。 对于永远运行且永不停止的项目来说，这一点很重要。 你可以用break来打破它。你知道吗

我来谈谈你的密码。您正在使用return，但是您没有对返回的变量执行任何操作。例如，您可以使用print()打印它们

示例：

def take_input():
    print (" ")
    city = input("which city do you wish to travel to? \n Options are: delhi, kolkata, bombay, bengaluru : ")
    city.lower()
    print (" ")
    days = int(input("How many days are you travelling for? eg 1 - 100 : ")) 
    nights = days - 1
    print (" ")
    spending_money = int(input("How much spending money do you plan on carrying?, eg 100 - 10000 : "))
    return city, days, spending_money , trip_cost(city, days, spending_money)


# trying to collect user data


#remaining code removed for minimal reproducible question :)


while True:
    myvar = ", "
    mylist = []
    for i in take_input():
        mylist.append(str(i))
    print("Returned values:",myvar.join(mylist))