how to find the target file's full(absolute path) of the symbolic link or soft link in python

when i give ls -l /etc/fonts/conf.d/70-yes-bitmaps.conf 

lrwxrwxrwx <snip> /etc/fonts/conf.d/70-yes-bitmaps.conf -> ../conf.avail/70-yes-bitmaps.conf

so for a symbolic link or soft link, how to find the target file's full(absolute path) in python,

If i use

os.readlink('/etc/fonts/conf.d/70-yes-bitmaps.conf')

it outputs

../conf.avail/70-yes-bitmaps.conf

but i need the absolute path not the relative path, so my desired output must be,

/etc/fonts/conf.avail/70-yes-bitmaps.conf

how to replace the .. with the actual full path of the parent directory of the symbolic link or soft link file.

74256 次浏览
小开

http://docs.python.org/library/os.path.html#os.path.abspath

also joinpath() and normpath(), depending on whether you're in the current working directory, or you're working with things elsewhere. normpath() might be more direct for you.

Specifically:

os.path.normpath(
os.path.join(
os.path.dirname( '/etc/fonts/conf.d/70-yes-bitmaps.conf' ),
os.readlink('/etc/fonts/conf.d/70-yes-bitmaps.conf')
)
)
小开 
os.path.realpath(path)

os.path.realpath returns the canonical path of the specified filename, eliminating any symbolic links encountered in the path.

小开

As unutbu says, os.path.realpath(path) should be the right answer, returning the canonical path of the specified filename, resolving any symbolic links to their targets. But it's broken under Windows.

I've created a patch for Python 3.2 to fix this bug, and uploaded it to:

http://bugs.python.org/issue9949

It fixes the realpath() function in Python32\Lib\ntpath.py

I've also put it on my server, here:

http://www.burtonsys.com/ntpath_fix_issue9949.zip

Unfortunately, the bug is present in Python 2.x, too, and I know of no fix for it there.

小开

The documentation says to use os.path.join():

The result may be either an absolute or relative pathname; if it is relative, it may be converted to an absolute pathname using os.path.join(os.path.dirname(path), result).

小开

On windows 10, python 3.5, os.readlink("C:\\Users\PP") where "C:\Users\PP" is a symbolic link (not a junction link) works.

It returns the absolute path to the directory.

This works on Ubuntu 16.04, python 3.5 as well.

小开

I recommend using pathlib library for filesystem operations.

import pathlib


x = pathlib.Path('lol/lol/path')
x.resolve()

Documentation for Path.resolve(strict=False): make the path absolute, resolving any symlinks. A new path object is returned.


提交答案