python flask api get时ValueError("No JSON object could be decoded")

发请求：http://127.0.0.1:8073/api/graph/chufang?input=['发热','头痛']

    if request.method == 'GET':
        r_query = request.args.to_dict()
        input_text = json.loads(r_query['input'])

报错：

    input_text = json.loads(r_query['input'])
  File "D:\PortablePython\App\lib\json\__init__.py", line 338, in loads
    return _default_decoder.decode(s)
  File "D:\PortablePython\App\lib\json\decoder.py", line 365, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "D:\PortablePython\App\lib\json\decoder.py", line 383, in raw_decode
    raise ValueError("No JSON object could be decoded")

原因，不能使用' '

改为 http://127.0.0.1:8073/api/graph/chufang?input=["发热", "头痛"]后，错误解决

该请求，相当于 'input='+json.dumps(["发热", "头痛"]) 

所以需要对r_query['input']中的内容进行json.loads