代码为：
favorite_language={
    'jen':'python',
    'sarah':'C',
    'edward':'ruby',
    'phil':'python',
    }

for language in favorite_language.values():
    print("The language is "+favorite_language[language].title())

报错为：KeyError:'python'

新人，不知问题出在哪里~~求解

favorite_language.values() 的返回值是数组 ['python', 'C', 'ruby', 'python']，所以不用再从字典favorite_language中取值了。

favorite_language={
    'jen':'python',
    'sarah':'C',
    'edward':'ruby',
    'phil':'python',
    }

for language in favorite_language.values():
    print("The language is "+ language.title())  # 修改的地方在这里

[此贴子已经被作者于2019-7-21 09:23编辑过]

明白了，谢谢！