CODEWITHSUNDEEP
pythonubuntupath
dinas
dinas

Reputation: 23

open() can't find file given path relative to PYTHONPATH

I did export PYTHONPATH=$PYTHONPATH:/home/User/folder/test. Then I ran python when I was in /home/User/ and checked sys.path - it was correct.

>>> import sys
>>> sys.path
['', '/usr/local/lib/python2.7/dist-packages/gitosis-0.2-py2.7.egg', 
'/home/User', '/home/User/folder/test','/usr/lib/python2.7',
'/usr/lib/python2.7/plat-linux2', '/usr/lib/python2.7/lib-tk', 
'/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', 
'/usr/local/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages']

Then I tried to open a file /home/User/folder/test/pics/text/text.txt like this:

>>>file = open('pics/text/text.txt','r')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IOError: [Errno 2] No such file or directory:

As you can see, first half of path to file is in $PYTHONPATH, and second half is given as an argument to open() function. Why doesn't it work? What should I change?

When I ran python from /home/User/folder/test (exported path) and tried to open file - it worked.

Upvotes: 2

Views: 8728

Answers (3)

Boris Burkov
Boris Burkov

Reputation: 14436

Whenever I want to import a script, relative to current and don't use packages, I usually use

sys.path = [os.path.dirname(__file__) + "/../another_dir"] + sys.path

Upvotes: 0

mgilson
mgilson

Reputation: 309831

If I'm reading your question correctly, you want your data to reside in a location relative to the module. If that's the case, you can use:

full_path = os.path.join(os.path.split(__file__)[:-1]+['pics','text','text.txt'])

__file__ is the path to the module (including modulename.py). So I split that path, pull off modulename.py ([:-1]) and add the rest of the relative path via os.path.join

Upvotes: 2

anq
anq

Reputation: 3262

Open is relative to the current directory and does not use PYTHONPATH. The current directory defaults to whatever it was when python was started on the command line.

You can change the current directory with os.chdir

Upvotes: 9

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