2022.8.13. Python中出现,ValueError: I/O operation on closed file.的解决方法b

54条评论
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主要原因是： 语句没有对齐。 打开文件后，其他语句要在 打开语句的范围内，才能继续使用打开的文件，如果对齐了，反而就打不开数据文件了，也访问不了数据文件。

项目场景：
出现ValueError: I/O operation on closed file，的错误。一般都是代码语句不对齐

问题描述
这就是代码语句不对齐出现的错误

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错误截图

原因分析：
代码中的while循环要在with语句里面，不然会出错。因为while循环是属于with里的


正确代码

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结果如下：

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