Python函数为空白条目提供默认值不起作用

Question

我已经尝试解决这个问题太久了!该怎么办？

def fallBack(submission):
    if (submission == ""):
           submission = "fixed!"  
           return(submission)

name = input("What is your name?")
(fallBack(name))

location = input("Hi "+name+"! Nice to meet you, I live inside a computer, where do you live?")

我一直有最后一个输入，但什么也没打印出来......

Answer 1

您需要存储fallBack()的结果。另外，更改 fallBack() 以在非 null 时返回原始值:

def fallBack(submission):
    if not submission:
        return "fixed!"
    else:
        return submission

然后，像这样使用它:

name = fallBack(input("What is your name?"))