Python os.path.relpath行为 [英] Python os.path.relpath behavior

问题描述

我在目录foo中有一个目录bar，目录foo中有文件foo_file.txt，目录bar中有文件bar_file.txt；即

I have a directory bar inside a directory foo, with file foo_file.txt in directory foo and file bar_file.txt in directory bar; i.e.

computer$ ls
foo/
computer$ ls foo/
bar/  foo_file.txt
computer$ ls foo/bar/
bar_file.txt

使用python os.path.relpath 函数，我希望:

Using the python os.path.relpath function, I expect:

os.path.relpath('foo/bar/bar_file.txt', 'foo/foo_file.txt')

给我:

'bar/bar_file.txt'

但是，它实际上给了我

'../bar/bar_file.txt'

这是为什么?是否有一种简单的方法来获得我想要的行为?

Why is this? Is there an easy way to get the behavior I want?

这是在具有Python 2.7.3的Linux上

This is on Linux with Python 2.7.3

推荐答案

os.path.relpath()假定其参数为目录.

>>> os.path.join(os.path.relpath(os.path.dirname('foo/bar/bar_file.txt'),
        os.path.dirname('foo/foo_file.txt')),
        os.path.basename('foo/bar/bar_file.txt'))
'bar/bar_file.txt'

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