1from collections import defaultdict 2import re 3 4NOQA_REGEXP = re.compile( 5 # Use the same regex as flake8 does. 6 # https://gitlab.com/pycqa/flake8/-/tree/master/src/flake8/defaults.py 7 # We're looking for items that look like this: 8 # `# noqa` 9 # `# noqa: E123` 10 # `# noqa: E123,W451,F921` 11 # `# NoQA: E123,W451,F921` 12 r"# noqa(?::[\s]?(?P<codes>([A-Z]+[0-9]+(?:[,\s]+)?)+))?", 13 re.IGNORECASE, 14) 15 16NOQA_CODE_MAP = { 17 # flake8 F401: module imported but unused. 18 "F401": "V104", 19 # flake8 F841: local variable is assigned to but never used. 20 "F841": "V107", 21} 22 23 24def _parse_error_codes(match): 25 # If no error code is specified, add the line to the "all" category. 26 return [ 27 c.strip() for c in (match.groupdict()["codes"] or "all").split(",") 28 ] 29 30 31def parse_noqa(code): 32 noqa_lines = defaultdict(set) 33 for lineno, line in enumerate(code, start=1): 34 match = NOQA_REGEXP.search(line) 35 if match: 36 for error_code in _parse_error_codes(match): 37 error_code = NOQA_CODE_MAP.get(error_code, error_code) 38 noqa_lines[error_code].add(lineno) 39 return noqa_lines 40 41 42def ignore_line(noqa_lines, lineno, error_code): 43 """Check if the reported line is annotated with "# noqa".""" 44 return lineno in noqa_lines[error_code] or lineno in noqa_lines["all"] 45