[Feature Request] Support for warnings

[YonatanAhituv]

Currently, there is no differentiating between errors and warnings from pyflakes, however
Atom's pyflakes linter managed to detected warnings from errors by looking for the following strings:

'used',
'redefines',
'shadowed'
'may be'

in the output. Maybe something like that could be integrated.

[kaste]

That sounds like a good addition. Can you make a PR? If you don't know how to start just ask, I can guide you through.

[YonatanAhituv]

@kaste I tried, but the documentation isn't good, and I haven't done any work with regex. Really sorry.

[kaste]

Basically you have to implement split_match

	def split_match(self, match):
		match, line, col, error, warning, message, near = super().split_match(match)
		if not match:
			return None

		# now parse and interpret 'message'
		# 'error' or 'warning' represent a 'code' or linter rule like 'W031' or 
		# '(no-redef)' etc. 
		if message is an error:
			error = 'error'
		else:
			warning = 'warning'
		return match, line, col, error, warning, message, near

[gorkicode]

Currently, there is no differentiating between errors and warnings from pyflakes, however Atom's pyflakes linter managed to detected warnings from errors by looking for the following strings:

'used',
'redefines',
'shadowed'
'may be'

in the output. Maybe something like that could be integrated.

Hi! :) take a look at #18