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!
Try changing the PYTHONPATH
environment 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=$PYTHONPATH:/usr/local/lib/python2.7/site-packages
The problem is that /usr/local/lib/python2.7/site-packages
is not in your default path list. In order to verify this, run the following commands:
import sys
for pth in sys.path:
print pth
You will get a list of the directories searched for modules. As you probably will not have /usr/local/lib/python2.7/site-packages
in the list, you have the following options:
Remove nltk
and install it again in one of the directories paths (note, that e.g. on Debian, it may be /usr/local/lib/python2.7/dist-packages
.
On each run, set PYTHONPATH variable: export PYTHONPATH=$PYTHONPATH:/usr/local/lib/python2.7/site-packages
(you can put this command in the $HOME/.bashrc
file).
Put a file local.pth
in /usr/lib/python2.7/site-packages
or /usr/lib/python2.7/dist-packages
(depending on the output of the script above), which contains a single line:
/usr/local/lib/python2.7/site-packages
This will add this directory to your default path list permanently.
(This one is recommended only for some seldom-used non-standard packages installed in some strange location, which is probably not your case) In the beginning of your script (before import nltk
) add the following code:
import sys
sys.path.append("/usr/local/lib/python2.7/site-packages")
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