加入变量和字符串以获取变量

Question

很抱歉，如果问题已解决，但这是一些简单的代码。

quiz_description = 'A quiz to test your knowledge'
quiz_type = 'This quiz is about social studies'
quiz_length = 'This test is five minutes long'

while 0 == 0:
    user_input = input('What do you want to know about the quiz? (length|type|description)\n')

    print('quiz_' + user_input)

此代码将导致

quiz_lenght

但我想加入quiz_和user_input，即length，并生成quiz_lenght并显示为该字符串设置的内容，即{{1 }}

有没有办法实现这个目标？

Answer 1

您应该使用字典实现此目的：

quiz = {
    'description': 'A quiz to test your knowledge',
    'type': 'This quiz is about social studies',
    'length': 'This test is five minutes long',
}

while 0 == 0:
    user_input = input('What do you want to know about the quiz? (length|type|description)\n')

    print(quiz.get(user_input, 'Please choose a correct attribute!')

dict.get将尝试根据第一个参数中的键找到一个值。如果它没有找到该密钥（即，如果用户没有输入建议值之一），它将返回第二个参数中的值。这样可以防止获得KeyError。