easygui.msgbox ('你输入了 ' + flavor) TypeError: must be str, not NoneType [英] easygui.msgbox ('You entered ' + flavour) TypeError: must be str, not NoneType

问题描述

import easygui

flavour = easygui.enterbox('What is your favourite ice cream flavour?')

easygui.msgbox ('You entered ' + flavour)

我该怎么做才能在我点击输入"框中的取消"按钮时不返回错误?目前我收到以下错误:"easygui.msgbox('你输入了'+风味)类型错误:必须是 str，而不是 NoneType"

What do I do here so that when I hit the 'cancel' button on the 'enter' box it doesn't return an error? At the moment I get the following error: "easygui.msgbox ('You entered ' + flavour) TypeError: must be str, not NoneType"

推荐答案

发生的事情是 msgbox 希望消息是字符串.然而，如果你点击取消，flavour 是一个 NoneType 对象.您可以添加 if 语句以确保您的代码在您点击取消时不会出错.执行以下操作:

What is happening is that msgbox wants the message to be string. However, if you hit cancel, flavour is a NoneType object. You can add an if statement to make sure your code does not error out if you hit cancel. Do something like:

flavour = easygui.enterbox('What is your favourite ice cream flavour?')

if flavour is not None:
    easygui.msgbox ('You entered ' + str(flavour))
else:
    pass

这篇关于easygui.msgbox ('你输入了 ' + flavor) TypeError: must be str, not NoneType的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！