NLTK API tweakage.

[jimwhite]

When I tried to use the Python ParsingShell I had errors that seem to be due to an API change in NLTK. nltk.tree.Tree.parse has apparently been removed/replaced by fromstring. There is bracket_parse too but its code says don't use it. Don't know if this is backward compatible but it works for me.

[jimwhite]

If you have Docker installed you can see the Python wrapper and GUI shell in action with a minimum of typing. The Docker Hub repo is here and can be launched with:

docker run -it --rm -p 5901:5901 jimwhite/bllip-parser-python

There are a few notes on running it in the description and there is a README.txt within the container (with basically the same info). I plan to make a posting and maybe a little video but figured I'd make a note of this development here in the meantime.

[dmcc]

Thanks for the patch! For compatibility, can we have it try fromstring and fallback to trying parse? I'm still using older versions of NLTK in some places.

[jimwhite]

Sure thing, should have done that to start with but I hardly ever code in Python. Since I'm not set up to test the old code I do that test first as before and the new stuff is in the exception block. The Docker build is updated now too (I tweaked the terminal settings so they're readable).