使用Python从套接字解析JSON消息

Question

I'm just looking for a really good hint on solving my problem, not necessarily the complete solution.

I can receive the following string over a TCP socket:

{"id":"555","jsonrpc":"2.0","result":null,"timestamp":"2018-08-03T17:32:41.894"}

this is how I'm reading in the data

while True:
    data = sock.recv(1024).decode('utf-8')
    if not data:
        sys.exit(0)

I'm trying to parse elements using the following method:

if (data["id"] == "555"):
    print("found it..now call a function!")

No matter what I try I get the following TypeError: string indices must be integers

I'm using Python version 3.7. I'm new to Python and programming for that matter and I've been at this for days.

Thanks in advance!

Answer 1

Python has a built-in json library specifically for this kind of thing.

import json
...
data = sock.recv(1024).decode('utf-8')    # this returns a JSON-formatted String
parsed_data = json.loads(data)            # this turns the string into a python dict
if parsed_data['id'] == '555':            # because it is now a dictionary, this will work
    ...