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# -*- coding: utf-8 -*-
# Copyright (c) 2019 Tyler N. Thieding <python@thieding.com>
# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/master/COPYING
"""Looks for try/except statements with too much code in the try clause."""
from pylint import checkers, interfaces
class BroadTryClauseChecker(checkers.BaseChecker):
"""Checks for try clauses with too many lines.
According to PEP 8, ``try`` clauses shall contain the absolute minimum
amount of code. This checker enforces a maximum number of statements within
``try`` clauses.
"""
__implements__ = interfaces.IAstroidChecker
# configuration section name
name = "broad_try_clause"
msgs = {
"W0717": (
"%s",
"too-many-try-statements",
"Try clause contains too many statements.",
)
}
priority = -2
options = (
(
"max-try-statements",
{
"default": 1,
"type": "int",
"metavar": "<int>",
"help": "Maximum number of statements allowed in a try clause",
},
),
)
def visit_tryexcept(self, node):
try_clause_statements = len(node.body)
if try_clause_statements > self.config.max_try_statements:
msg = "try clause contains {0} statements, expected at most {1}".format(
try_clause_statements, self.config.max_try_statements
)
self.add_message(
"too-many-try-statements", node.lineno, node=node, args=msg
)
def register(linter):
"""Required method to auto register this checker."""
linter.register_checker(BroadTryClauseChecker(linter))
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