Python cannot find dateutil.relativedelta

Question

I am trying to run a program using paster serve, but I keep getting the error:

ImportError: No module named dateutil.relativedelta

Answer 1

This looks like a problem of package installation to me. A troubleshooting list that comes to my mind:

1. Verify you installed the package.
2. If installed, verify that the files have been stored in the right directory (a directory accessible from your python interpreter (= in the PYTHONPATH, useful article here).
3. Verify permission on those files.
4. Restart your shell if you tried the import there.
5. Reboot your computer (ouch... it's 10 years since I started using GNU/Linux, but I still suffer from the bad memories of Windows! ;)