I am on Mac and installed csvkit. When I run csvlook, I get a traceback with the following error message:

IOError: [Errno 13] Permission denied: '/Library /Pythong/2.7/site-packages/python_dateutil-2.2-py2.7.egg/EGG-INFO/requires.txt'

Based on the documentation, I also ran the following:

pip install --upgrade setuptools
pip install --upgrade csvkit

Still, no luck. How can I get this to work?

  • 1
    Can you check ls -lh /Library /Pythong/2.7/site-packages/python_dateutil-2.2-py2.7.egg/EGG-INFO/requires.txt and if -rw------- you have to change to -rw-r--r--. May be this is your case.
    – taliezin
    Apr 2, 2015 at 14:57
  • Yes, this like it is the problem. It is set to: -rw-------. I'm not sure where to obtain info on making this change. Would you mind offering a link or a short description? Thanks!
    – Brian P
    Apr 2, 2015 at 15:16
  • 1
    When you are in this directory from command line you can use: chmod 644 * .
    – taliezin
    Apr 2, 2015 at 15:21
  • Exactly right. Feel free to put in an answer and I will accept it. Very much appreciated!
    – Brian P
    Apr 2, 2015 at 15:32
  • 1
    It is ok, I am glad it helped. :)
    – taliezin
    Apr 2, 2015 at 15:33

2 Answers 2


Since @taliezin did not post his answer, I'll do it. This fixed the issue for me, in Xubuntu.

You need to make the file /Python/2.7/site-packages/python_dateutil-2.2-py2.7.egg/EGG-INFO/requires.txt readable not only by root, but also by other users.

So, in a terminal, type each command followed by Enter:

sudo -s
cd /Python/2.7/site-packages/python_dateutil-2.2-py2.7.egg/EGG-INFO/
chmod 664 *

FWIW, the reason why @colin-maudry's solution works is because this is a known bug specific to python_dateutil, as explained in this related SO discussion:


This is a known issue with python-dateutil where the permissions aren't set correctly in the pypi package: https://bugs.launchpad.net/dateutil/+bug/1243202. This isn't a problem with pip because pip normalizes permissions, but if you install it differently you might run into problems.

The solution given:

  sudo chmod o+r /usr/local/lib/python2.7/dist-packages/python_dateutil-2.2-py2.7.egg/EGG-INFO/top_level.txt

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