Add a PythonSyntaxBear that only complains about syntax errors

[underyx]

It's probably possible to use the builtin ast module for this.

Or maybe https://github.com/PyCQA/astroid or https://github.com/davidhalter/jedi

[gitmate-bot]

Thanks for reporting this issue! A coalaian will look at it soon.

[jayvdb]

Would you consider pyflakes acceptable? It also reports unused import/variable, but generally stays strictly away from style issues.

[sils]

:+1: if it does the job

[underyx]

Maybe if we can add the possibility of a syntax_only = yes option. I'd like to give people with crappy codebases the ability to start using coala with useful checks without changing a single line of code.

On Wed, Sep 14, 2016, 5:21 PM Lasse Schuirmann notifications@github.com wrote:

👍 if it does the job

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[jayvdb]

Nod. I expected you were wanting a less noisy tool. We would need to filter the pyflakes output to achieve that, and it is a reasonable request.

Jedi linting is still unstable, but looks like a serious option anyway. I suspect astroid is not much better than the ast module at detecting SyntaxError's.

[jayvdb]

@sadovnychyi, do you have an idea on how good/stable jedi is now at identifying syntax errors. I havent played with it very much, and it was a while ago, so I could be very wrong.

[sadovnychyi]

@jayvdb No idea, sorry. AFAIK Jedi just ignores syntax errors if possible. I'm not aware of any APIs which would allow to only check the syntax.

Citation from here:

You might ask now: "Why didn't you use the ``ast``
module for this? Well, ``ast`` does a very good job understanding proper Python
code, but fails to work as soon as there's a single line of broken code.

Seems like the whole idea of Jedi's custom parser is to ignore any possible syntax errors.

[jayvdb]

There is a new release of pylint and astroid, which should stablise quickly. That might be worth investigating.

But, IMO it is worth-while improving PyflakesBear to add syntax_only = yes which ignores the various error codes which are not syntax related, or maybe just reduce the severity of results that are not errors.