diff options
Diffstat (limited to 'pylint/checkers/base.py')
| -rw-r--r-- | pylint/checkers/base.py | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/pylint/checkers/base.py b/pylint/checkers/base.py index 6cff1e2..38cf0ab 100644 --- a/pylint/checkers/base.py +++ b/pylint/checkers/base.py @@ -328,6 +328,10 @@ class BasicErrorChecker(_BasicChecker): 'continue-in-finally', 'Emitted when the `continue` keyword is found ' 'inside a finally clause, which is a SyntaxError.'), + 'E0117': ("nonlocal variable without binding", + 'nonlocal-without-binding', + 'Emitted when a nonlocal variable is not bound', + {'minversion': (3, 0)}), } @check_messages('function-redefined') @@ -452,6 +456,29 @@ class BasicErrorChecker(_BasicChecker): (node.operand.op == node.op)): self.add_message('nonexistent-operator', node=node, args=node.op*2) + def _check_nonlocal_without_binding(self, node, name): + current_scope = node.scope() + while True: + if current_scope.parent is None: + break + + if not isinstance(current_scope, astroid.FunctionDef): + self.add_message('nonlocal-without-binding', node=node) + break + else: + if name not in current_scope.locals: + current_scope = current_scope.parent.scope() + continue + else: + return + + self.add_message('nonlocal-without-binding', node=node) + + @check_messages('nonlocal-without-binding') + def visit_nonlocal(self, node): + for name in node.names: + self._check_nonlocal_without_binding(node, name) + @check_messages('abstract-class-instantiated') def visit_call(self, node): """ Check instantiating abstract class with |