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为什么print(classmates.append('ZhaoLiu'))这个的输出结果是NONE？

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aiyaxiaoya

#1 Created at ... [Delete] [Delete and Lock User]

classmates = ['ZhangSan','LiSi','WangWu'] 为什么print(classmates.append('ZhaoLiu'))这个的输出结果是NONE？ 但是按照下面这样就能得到正确的输出结果： classmates.append('ZhaoLiu') print(classmates)

Michael_learn_to_live

#2 Created at ... [Delete] [Delete and Lock User]

因为append这个函数本身不返回任何值，所以你用它为print的参数自然打印出来的是none.

请叫我啊龙_

#3 Created at ... [Delete] [Delete and Lock User]

只对操作 不返回值 与Java有本质的区别

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