仅使变量整数输入== Python中的整数 [英] Making a variable integer input only == an integer in Python

问题描述

我正在尝试使我的变量整数输入仅==成为整数，如果不是，我想打印并显示错误消息.我已将其放在 if 语句中.当我输入字符串而不是错误消息时，总是会出现错误.

Im trying to make my variable integer input to be only == to an integer, and if its not I want to print and error message. I have put this in a if statement. I always get an error when I input a string instead of my error message.

age = int(input("Enter age:"))

if age != int:
print("Not a number")

推荐答案

您必须使用raw_input而不是输入

如果您要重复此操作直到您获得正确的值，就可以这样做

if you want this to repeat until you have the correct value you can do this

while True:
    try:
        age = int(raw_input("Enter age:"))
    except ValueError:
        print("Not a number")

    if age == desired_age: # note I changed the name of your variable to desired_age instead of int
        break

我不建议您使用像int这样的变量名...这通常是一个坏习惯

I dont recommend you use variable names like int... its generally a bad practice

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