如何获取从用户输入中输入的变量的值? [英] How to get value of variable entered from user input?

问题描述

我正在尝试创建一个基本菜单，用于检查输入的变量是否与定义的变量匹配.如果定义了变量，则获取定义变量的数据.

I am trying to create a basic menu that checks to see if the variable entered matches a defined variable. If the variable is defined get the data of the defined variable.

示例.

Item1 = "bill"
Item2 = "cows"
item3 = "abcdef"
Choose_Item = input("Select your item: ")

• 我输入Item1
• Choose_Item 应该等于 "bill"
• I type in Item1
• Choose_Item should equal "bill"

推荐答案

这似乎是您要找的:

Choose_Item = eval(input("Select your item:  "))

不过，这可能不是最佳策略，因为打字错误或恶意用户很容易使您的代码崩溃、使您的系统过载或做任何他们喜欢的其他令人讨厌的事情.对于这种特殊情况，更好的方法可能是

This probably isn't the best strategy, though, because a typo or a malicious user can easily crash your code, overload your system, or do any other kind of nasty stuff they like. For this particular case, a better approach might be

items = {'item1': 'bill', 'item2': 'cows', 'item3': 'abcdef'}
choice = input("Select your item: ")
if choice in items:
    the_choice = items[choice]
else:
    print("Uh oh, I don't know about that item")

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