checker.py 文件源码

def iter_child_nodes(node, omit=None, _fields_order=_FieldsOrder()):
    """
    Yield all direct child nodes of *node*, that is, all fields that
    are nodes and all items of fields that are lists of nodes.
    """
    for name in _fields_order[node.__class__]:
        if name == omit:
            continue
        field = getattr(node, name, None)
        if isinstance(field, ast.AST):
            yield field
        elif isinstance(field, list):
            for item in field:
                yield item