I have downloaded stanford postagger and parser following the instructions written for below question:
But when I execute the commands at bottom, it worked perfectly fine for ipython in terminal (Mac OS) but showed error in Spyder(Anaconda)
(NLTK was unable to find stanford-postagger.jar!) Since I have set CLASSPATH in terminal, I am not sure what went wrong. When I checked
import os
print os.environ.get('CLASSPATH')
It returned None in Spyder but correct path in terminal. I have also restarted the program and set directory to $HOME. Is there anything I might be missing here?
from nltk.tag.stanford import StanfordPOSTagger
st = StanfordPOSTagger('english-bidirectional-distsim.tagger')
st.tag('What is the airspeed of an unladen swallow ?'.split())
The problem has nothing to do with python or the nltk; it's a consequence of how OS X starts GUI applications. Basically, the CLASSPATH environment variable is set in your .profile or its kin, but this file is only executed when you are starting Terminal; GUI applications inherit their environment from your login process, which doesn't know CLASSPATH.
There are numerous SO questions about how to deal with this; see here or here. But in your case, there are also a couple of work-arounds that ought to work:
Start Spyder from the Terminal command line, not via the Launchpad (just type spyder &). Or
Your python program can also set its own environment (which will be inherited by child processes) prior to launching the Stanford parser, like this:
os.putenv("CLASSPATH", "/path/to/the/parser")