Temporarily signature fix for docstring generation in python2

[stu105502]

The jedi library seems to have for the time being general problems with its signature class. You are explicitly catching these exceptions in your lines 73-83

            try:
                signatures = script.call_signatures()
                logger.info('signatures: %s', signatures)
                if len(signatures) > 0:
                    sig = signatures[-1]
                    params = [param.description for param in sig.params]
                    sig_text = sig.name + '(' + ', '.join(params) + ')'
                    logger.info("signature: %s, name: %s",
                                sig, sig.name)
            except Exception as ex:
                logger.exception("signature text failed %s", sig_text)

and have noticed this problem but jedi seems to have the tendency to use signatures and repeat an assertion-error regarding some binding mechanism when you call docstring on certain completions. I don't know what the error of jedi is but because of it my autocompletion regarding numpy does never work and stops ncm2-jedi completely. With python3 these signature problems are produced by some star-parsing, while in python2 some binding problems occur. By simply using try/except blocks for the dockstrings one can avoid these signature errors until these problems are fixed and contain ncm2-jedi functionality.

Maybe you can replicate the assertion error to by simply running this python code:

import jedi
jedi.settings.call_signatures_validity = 20
source = '''
import numpy as np
np.'''
script = jedi.Script(source, 3, len('np.'), 'example.py')
completions = script.completions()
for completion in completions:
    print(completion)
    print(completion.docstring())

in my case jedi fails always with python2 as well python3

[roxma]

Thanks

[stu105502]

No problem, btw the docstring-function seems to be able to receive an optional parameter called 'raw'. If you use completion.docstring(raw=True), jedi does not processes signatures and return the plain docstring without additional information. This does no help with the snippet-generation but at least, this would always produce a docstring you could show.