garden/content/daily/2024-05-21.md
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+++ title = 2024-05-21 author = ["SouthFox"] date = 2024-05-21T23:25:00+08:00 lastmod = 2024-05-21T23:28:08+08:00 tags = ["publish"] draft = false +++

Python 既读又写

[python]({{< relref "../main/20240521232625-python.md" >}}) 中 open 函数为 r+ 模式时为即读又能写,但是读完整个文件后 文件位置将处于最末尾,这时写入相当于追加写,需要使用 seek(0) 重新将 文件位置置于开头。