尝试对 Windows 文件路径使用反斜杠时出现 SyntaxError [英] SyntaxError when trying to use backslash for Windows file path

问题描述

我尝试使用以下代码行确认文件是否存在:

I tried to confirm if a file exists using the following line of code:

os.path.isfile()

但我注意到如果从 Windows 操作系统复制和粘贴使用反斜杠:

But I noticed if back slash is used by copy&paste from Windows OS:

os.path.isfile("C:\Users\xxx\Desktop\xxx")

我有一个语法错误:(unicode 错误)等等等等

I got a syntax error: (unicode error) etc etc etc.

当使用正斜杠时:

os.path.isfile("C:/Users/xxx/Desktop/xxx")

成功了.

请问为什么会这样?甚至答案也很简单:这是约定俗成的."

Can I please ask why this happened? Even the answer is as simple as :"It is a convention."

推荐答案

反斜杠是转义符.这应该有效:

Backslash is the escape symbol. This should work:

os.path.isfile("C:\\Users\\xxx\\Desktop\\xxx")

这是可行的，因为您对转义符进行转义，并且 Python 将其作为此文字传递:

This works because you escape the escape symbol, and Python passes it as this literal:

"C:\Users\xxx\Desktop\xxx"

但更好的做法是确保跨平台兼容性，像这样收集路径段(可能有条件，基于平台)并使用 os.path.join

But it's better practice and ensures cross-platform compatibility to collect your path segments (perhaps conditionally, based on the platform) like this and use os.path.join

path_segments = ['/', 'Users', 'xxx', 'Desktop', 'xxx']
os.path.isfile(os.path.join(*path_segments))

应该为您的案例返回 True.

Should return True for your case.

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