Python线程未设置输出变量

Question

So I have a simple thread that goes and performs an http request that returns a json object and I want to use json.loads to put that in to a dict specified by passing a reference to said dict.

def thr_get_json(host, port, path, result):
    conn = httplib.HTTPConnection(host, port)
    conn.request('GET', path)
    resp = conn.getresponse()
    if resp.status != 200:
        raise "HTTP Error!"
    result = json.loads(resp.read())

results = {}

get_thread = threading.Thread(target=thr_get_json, args=('example.com', 80, '/output.php', results))

For some reason, results is empty. As it's a mutable object being passed to a function then it would be a reference right? Or am I way out on this.

Answer 1

You must use result.update()

You just overwrote result, it's a different variable like that

(attention to the fact that you use both result (singular) and results)

Answer 2

You Need to pass a Key as-well, or define a key where you would store your result:

Inside your function append the data to the dict: result['responseData'] = json.loads(resp.read())

you can access the results by using the results['responseData'] after the thread executes