How to get an absolute file name in Python?

Question

Given a path such as

"mydir/myfile.txt"

How do I find the absolute filename relative to the current working directory in Python? E.g. on Windows, I might end up with:

"C:/example/cwd/mydir/myfile.txt"

Answer 1

>>> import os
>>> os.path.abspath("mydir/myfile.txt")

Answer 2

>>> import os
>>> os.path.abspath('mydir/myfile.txt')
'C:\\example\\cwd\\mydir\\myfile.txt'
>>>

Answer 3

Better still, install the path.py module, it wraps all the os.path functions and other related functions into methods on an object that can be used wherever strings are used:

>>> from path import path
>>> path('mydir/myfile.txt').abspath()
'C:\\example\\cwd\\mydir\\myfile.txt'
>>>