def _count_slots_items(
self,
node: ast.Assign,
elements: ast.Tuple,
) -> None:
fields: List[str] = []
for tuple_item in elements.elts:
if not isinstance(tuple_item, ast.Str):
self.add_violation(IncorrectSlotsViolation(node))
return
fields.append(tuple_item.s)
for _, counter in Counter(fields).items():
if counter > 1:
self.add_violation(IncorrectSlotsViolation(node))
return
def _check_slots(self, node: ast.Assign) -> None:
if not self._contains_slots_assign(node):
return
if isinstance(node.value, self._blacklisted_slots_nodes):
self.add_violation(IncorrectSlotsViolation(node))
return
if isinstance(node.value, ast.Tuple):
self._count_slots_items(node, node.value)