如何更新这些嵌套 dict 对象的值？

问题描述

我试图更新 dict 值中 all_friends_paginating_after_cursor 的值，我尝试了不同的方法但没有用，我该如何更新值？

a= {"doc_id": "1","method": "post","locale": "user","pretty": "false","format": "json","purpose": "fetch","fb_api_client_context": "{\"load_next_page_counter\":1,\"client_connection_size\":20}","variables": "{\"profile_id\":\"1\",\"profile_image_size\":180,\"all_friends_paginating_first\":20,\"all_friends_paginating_at_stream_use_customized_batch\":false,\"all_friends_paginating_after_cursor\":\"AQHR4waNWT-YvaXk-AXhRmdl2ldevUdzx_TybGh2ggSielOYRQc-jOZsdsffdsfdsfdsfds1_g\"}","fb_api_req_friendly_name": "AllFriendListContentQuery","fb_api_caller_class": "ConnectionManager","fb_api_analytics_tags": "[\"GraphServices\",\"At_Connection\"]","client_trace_id": "jj89u654654465","server_timestamps": "true"}

解决方法

看起来 "variables"（包含 "all_friends_paginating_after_cursor"）是一个 JSON 字符串。一种可能的方法是将其转换为字典，更改值，然后再次将其转换为字符串。查看此代码片段：

import json
variables = json.loads(a["variables"])
variables["all_friends_paginating_after_cursor"] = "NEW VALUE"
a["variables"] = json.dumps(variables)