def _check_unpythonic_compare(self, node: ast.Compare) -> None:
all_nodes = [node.left, *node.comparators]
for index, compare in enumerate(all_nodes):
if not isinstance(compare, ast.Call):
continue
if functions.given_function_called(compare, {'len'}):
ps = index - len(all_nodes) + 1
if not _is_correct_len(node.ops[ps], node.comparators[ps]):
self.add_violation(UselessLenCompareViolation(node))
def _check_useless_len(self, node: AnyIf) -> None:
if isinstance(node.test, ast.Call):
if given_function_called(node.test, {'len'}):
self.add_violation(UselessLenCompareViolation(node))