Python装饰器参数如何获取？

import inspect

def task(_id, params):

    def decorator(func):
        @wraps(func)
        def wrapper(*args, **kwargs):
            return func(*args, **kwargs)
        wrapper._id = _id
        wrapper.params = params
        return wrapper

    return decorator

import ast

def get_decorator_args(func):
    source = inspect.getsource(func)
    tree = ast.parse(source)

    for node in ast.walk(tree):
        if isinstance(node, ast.functiondef):
            for decorator in node.decorator_list:
                if isinstance(decorator, ast.call) and decorator.func.id == "task":
                    args = {
                        arg.arg: ast.literal_eval(arg.value)
                        for arg in decorator.keywords
                    }
                    return args
    return {}

@task(_id="aaa", params=(1, 2, 3))
def foo(q=1):
    ...

print(get_decorator_args(foo))  # {'_id': 'aaa', 'params': (1, 2, 3)}