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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-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。