python - Importing Libraries Issue - "ImportError: No Module named ____"

Question

I've looked through a lot of the other question/answers for this topic but no avail.

I downloaded numpy and nltk using pip, and based on the messages I know the install location is: Requirement already satisfied (use --upgrade to upgrade): nltk in /usr/local/lib/python2.7/site-packages, so it looks like it's installing in the directory for version 2.7.

When I run python I get Python 2.7.3 (v2.7.3:70274d53c1dd, Apr 9 2012, 20:52:43), so that's clearly also version 2.7.

However, when I try "import nltk" or "import numpy" in the Python console, I always get the ImportError: No module named nltk error. Any advice would be greatly appreciated!

Answer 1

Try changing the PYTHONPATHenvironment variable. If you are using BASH the below should work. Other Linux shells will be slightly different in how they assign environment variables.

export PYTHONPATH=$PYTHONPATH:/usr/local/lib/python2.7/site-packages