Parse commandline arguments of engines about python-chess-annotator

[rpdelaney]

I'm having trouble getting gnuchess to compile on OSX for testing. I may be able to try it on my linux machine when I get home. In the mean time, do you know of any other engines that accept or require runtime parameters?

[Entze]

@rpdelaney I figure you could use an optional argument of stockfish for debugging. Why do you need to compile gnuchess? Aren't there binaries for MacOs?

For now there is a temporary solution: gnuchess usually comes with the gnuchessu variant which is equivalent to gnuchess -u. I was able to verify that this works.

[rpdelaney]

I might be missing something but it looks like this isn't possible with python-chess. Could a wrapper script work? I tried testing it, but gnuchess -u still doesn't give me a uci interface after I tried installing it in archlinux.

[niklasf]

python-chess would accept ["gnuchess", "-u"] in all places that accept "stockfish".

[rpdelaney]

If it also accepts ["stockfish"] then this is a trivial fix

[niklasf]

Cool. It does/should.

[rpdelaney]

Hm. seems gnuchess has a deficient implementation of the UCI spec. After 9b6ff9a :

$ python3 annotator/__main__.py -e "gnuchess -u" -f data/caruana-kasparov.pgn

An unhandled exception occurred: <class 'TypeError'>
Traceback (most recent call last):
  File "annotator/__main__.py", line 807, in <module>
    main()
  File "annotator/__main__.py", line 797, in main
    raise e
  File "annotator/__main__.py", line 790, in main
    engine, args.threads)
  File "annotator/__main__.py", line 747, in analyze_game
    node.root().headers["Annotator"] = annotator
  File "/usr/local/lib/python3.7/site-packages/chess/pgn.py", line 549, in __setitem__
    elif "\n" in value or "\r" in value:
TypeError: argument of type 'NoneType' is not iterable

Stand by......