如何在python中合并多个rss提要，将它们转换为单个JSON文件？

import urllib.request
import xmltodict
import json

url = "https://www.feedforall.com/sample.xml"

with urllib.request.urlopen(url) as response:
    data_dict = xmltodict.parse(response.read())
    json_data = json.dumps(data_dict)
    with open("data.json", "w") as json_file:
        json_file.write(json_data)
        json_file.close()
    response.close()

这段代码已经可以完成这项工作，但只需要一个url