如何从 Python 中的文件名替换(或去除)扩展名? [英] How can I replace (or strip) an extension from a filename in Python?

问题描述

Python 中是否有内置函数可以替换(或删除，无论如何)文件名的扩展名(如果有的话)?

Is there a built-in function in Python that would replace (or remove, whatever) the extension of a filename (if it has one)?

示例:

print replace_extension('/home/user/somefile.txt', '.jpg')

在我的例子中:/home/user/somefile.txt 会变成 /home/user/somefile.jpg

In my example: /home/user/somefile.txt would become /home/user/somefile.jpg

我不知道这是否重要，但我需要在我正在编写的 SCons 模块中使用它.(所以也许我可以使用一些 SCons 特定功能?)

I don't know if it matters, but I need this for a SCons module I'm writing. (So perhaps there is some SCons specific function I can use ?)

我想要一些干净的.对字符串中所有出现的 .txt 进行简单的字符串替换显然是不干净的.(如果我的文件名是 somefile.txt.txt.txt，这将失败)

I'd like something clean. Doing a simple string replacement of all occurrences of .txt within the string is obviously not clean. (This would fail if my filename is somefile.txt.txt.txt)

推荐答案

尝试 os.path.splitext 它应该做你想做的事.

Try os.path.splitext it should do what you want.

import os
print os.path.splitext('/home/user/somefile.txt')[0]+'.jpg'

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