文件存储形式多种多样，比如可以保存成 TXT 纯文本形式，也可以保存为 JSON 格式、CSV 格式等，本节就来了解一下文本文件的存储方式。
来源：https://cuiqingcai.com/5557.html
[Python3 网络爬虫开发实战] 5.1 – 文件存储 | 珊瑚贝
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