python的txt文件存取

#讀文件
with open("xiaoqu_url.txt", "r+", encoding="utf-8") as f:
            content=f.read()
            url_list=content[:-1].split(',')#取出來的元素會根據逗號分割成一個列表形式
#寫文件
with open("xiaoqu_url.txt", "a+", encoding="utf-8") as f:
               f.write(url + ",")