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__init__.py	575 B	-rw-r--r--
_check_docs_utils.py	25.74 KB	-rw-r--r--
bad_builtin.py	2.22 KB	-rw-r--r--
broad_try_clause.py	2.25 KB	-rw-r--r--
check_elif.py	2.09 KB	-rw-r--r--
code_style.py	12.51 KB	-rw-r--r--
comparetozero.py	3.09 KB	-rw-r--r--
comparison_placement.py	2.3 KB	-rw-r--r--
confusing_elif.py	1.99 KB	-rw-r--r--
consider_refactoring_into_whil...	3.23 KB	-rw-r--r--
consider_ternary_expression.py	1.66 KB	-rw-r--r--
dict_init_mutate.py	2.06 KB	-rw-r--r--
docparams.py	25.3 KB	-rw-r--r--
docstyle.py	2.87 KB	-rw-r--r--
dunder.py	2.33 KB	-rw-r--r--
empty_comment.py	1.91 KB	-rw-r--r--
emptystring.py	2.9 KB	-rw-r--r--
eq_without_hash.py	1.42 KB	-rw-r--r--
for_any_all.py	5.69 KB	-rw-r--r--
magic_value.py	4.14 KB	-rw-r--r--
mccabe.py	6.89 KB	-rw-r--r--
no_self_use.py	3.62 KB	-rw-r--r--
overlapping_exceptions.py	3.26 KB	-rw-r--r--
private_import.py	10.97 KB	-rw-r--r--
redefined_loop_name.py	3.14 KB	-rw-r--r--
redefined_variable_type.py	4 KB	-rw-r--r--
set_membership.py	1.75 KB	-rw-r--r--
typing.py	19.91 KB	-rw-r--r--
while_used.py	1.07 KB	-rw-r--r--

Code Editor : redefined_loop_name.py

# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
# For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
# Copyright (c) https://github.com/PyCQA/pylint/blob/main/CONTRIBUTORS.txt

"""Optional checker to warn when loop variables are overwritten in the loop's body."""

from __future__ import annotations

from astroid import nodes

from pylint import checkers
from pylint.checkers import utils
from pylint.interfaces import HIGH
from pylint.lint import PyLinter

class RedefinedLoopNameChecker(checkers.BaseChecker):
    name = "redefined-loop-name"

msgs = {
        "W2901": (
            "Redefining %r from loop (line %s)",
            "redefined-loop-name",
            "Used when a loop variable is overwritten in the loop body.",
        ),
    }

def __init__(self, linter: PyLinter) -> None:
        super().__init__(linter)
        self._loop_variables: list[
            tuple[nodes.For, list[str], nodes.LocalsDictNodeNG]
        ] = []

@utils.only_required_for_messages("redefined-loop-name")
    def visit_assignname(self, node: nodes.AssignName) -> None:
        assign_type = node.assign_type()
        if not isinstance(assign_type, (nodes.Assign, nodes.AugAssign)):
            return
        node_scope = node.scope()
        for outer_for, outer_variables, outer_for_scope in self._loop_variables:
            if node_scope is not outer_for_scope:
                continue
            if node.name in outer_variables and not utils.in_for_else_branch(
                outer_for, node
            ):
                self.add_message(
                    "redefined-loop-name",
                    args=(node.name, outer_for.fromlineno),
                    node=node,
                    confidence=HIGH,
                )
                break

@utils.only_required_for_messages("redefined-loop-name")
    def visit_for(self, node: nodes.For) -> None:
        assigned_to = [a.name for a in node.target.nodes_of_class(nodes.AssignName)]
        # Only check variables that are used
        assigned_to = [
            var
            for var in assigned_to
            if not self.linter.config.dummy_variables_rgx.match(var)
        ]

node_scope = node.scope()
        for variable in assigned_to:
            for outer_for, outer_variables, outer_for_scope in self._loop_variables:
                if node_scope is not outer_for_scope:
                    continue
                if variable in outer_variables and not utils.in_for_else_branch(
                    outer_for, node
                ):
                    self.add_message(
                        "redefined-loop-name",
                        args=(variable, outer_for.fromlineno),
                        node=node,
                        confidence=HIGH,
                    )
                    break

self._loop_variables.append((node, assigned_to, node.scope()))

@utils.only_required_for_messages("redefined-loop-name")
    def leave_for(self, node: nodes.For) -> None:  # pylint: disable=unused-argument
        self._loop_variables.pop()

def register(linter: PyLinter) -> None:
    linter.register_checker(RedefinedLoopNameChecker(linter))

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Code Editor : redefined_loop_name.py