tools.py 文件源码

def copy_node(node):
    new_node = type(node)()
    for field, value in ast.iter_fields(node):
        setattr(new_node, field, value)
    for attr in node._attributes:
        try:
            value = getattr(node, attr)
        except AttributeError:
            pass
        else:
            setattr(new_node, attr, value)
    return new_node