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#!/usr/bin/env python
# -*- coding: utf-8 -*-
import tokenize
from pylint import checkers, interfaces
class PEP3110TokenChecker(checkers.BaseTokenChecker):
__implements__ = interfaces.ITokenChecker
name = 'python3'
enabled = False
msgs = {
'E3110': ('Python 3 uses `as` instead of comma token to catch exceptions',
'no-comma-exception',
'See http://www.python.org/dev/peps/pep-3110/',
{'maxversion': (3, 0)}),
}
def process_tokens(self, tokens):
comma_found = in_except = False
pcount = 0
for tok_type, token, start, _, _ in tokens:
if tok_type == tokenize.NAME and token == 'except':
in_except = True
comma_found = False
pcount = 0
elif tok_type == tokenize.OP and in_except:
if token == '(':
pcount += 1
elif token == ')':
pcount -= 1
elif token == ',' and pcount == 0:
comma_found = True
if token == ':':
if in_except and comma_found:
self.add_message('no-comma-exception', line=start[0])
comma_found = in_except = False
pcount = 0
def register(linter):
linter.register_checker(PEP3110TokenChecker(linter))
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