Python 获取json.decoder.JSONDecodeError:预期值：第1行第1列

代码：

插入的打印语句的输出：

def get_result(response_path):
  response_s3_path = re.sub(config.path_prefix,'',response_path).strip('/')
  print('== response_s3_path')
  print(response_s3_path)
  response_local_path = download_file_from_s3(response_s3_path)
  print('== response_local_path')
  print(response_local_path)
  if response_local_path==-1:
      print('Failed to open response_local path')
      return -1

  with open(response_local_path, 'r') as f:
      print(type(json.load(f)))
      print(json.load(f))

      if isinstance(json.load(f), str):
          response = json.loads(json.load(f))
            #response = json.load(f)
      elif isinstance(json.load(f), dict):
          print('json.loads(dict)')
          response = json.load(f)

未能理解如果json.load（f）具有类“dict”，并且在打印时，如果它似乎是一个有效的字典，那么为什么它会在行中给我JsonDecodeError：

elif-isinstance（json.load（f），dict）：

---

请帮助。

您正在多次执行

json.load（f）

f

这里有一个文件对象，它可以记住它的读取位置。加载JSON一次后，文件指针将位于文件末尾。再次尝试读取将导致它不返回任何值，除非您将其倒带，从而导致显示错误

不要多次加载该文件，这也是非常浪费的。只做一次：

  File "/Users/AjayB/anaconda3/envs/MyDjangoEnv/lib/python3.6/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/Users/AjayB/anaconda3/envs/MyDjangoEnv/lib/python3.6/site-packages/django/core/handlers/base.py", line 126, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/Users/AjayB/anaconda3/envs/MyDjangoEnv/lib/python3.6/site-packages/django/core/handlers/base.py", line 124, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/AjayB/anaconda3/envs/MyDjangoEnv/lib/python3.6/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/Users/AjayB/Desktop/Python/crackd/misc/training_apis/training_apis_server/Apis/views.py", line 1141, in get_inference_results_api
    _, inference_array = get_inference_results_from_df(df_pass)
  File "/Users/AjayB/Desktop/Python/crackd/misc/training_apis/training_apis_server/Apis/views.py", line 1260, in get_inference_results_from_df
    inference_array = get_inference_array(inference_links)
  File "/Users/AjayB/Desktop/Python/crackd/misc/training_apis/training_apis_server/Apis/views.py", line 721, in get_inference_array
    final_response_params = get_result(obj_tmp['response']['path'])
  File "/Users/AjayB/Desktop/Python/crackd/misc/training_apis/training_apis_server/Apis/views.py", line 644, in get_result
    print(isinstance(json.load(f), dict))
  File "/Users/AjayB/anaconda3/envs/MyDjangoEnv/lib/python3.6/json/__init__.py", line 299, in load
    parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
  File "/Users/AjayB/anaconda3/envs/MyDjangoEnv/lib/python3.6/json/__init__.py", line 354, in loads
    return _default_decoder.decode(s)
  File "/Users/AjayB/anaconda3/envs/MyDjangoEnv/lib/python3.6/json/decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/Users/AjayB/anaconda3/envs/MyDjangoEnv/lib/python3.6/json/decoder.py", line 357, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
[08/Nov/2019 05:49:38] "POST /list/inference_history/ HTTP/1.1" 500 147054

---

从现在起，使用

数据
而不是重复
json.load（f）
是的，这对我很有效

with open(response_local_path, 'r') as f:
    data = json.load(f)

print(data)

不再多次使用json.load（f）。
您试图多次读取同一文件指针。你只能读一次；除非在多次读取之间倒带。不要尝试多次解码JSON！这也很浪费，这很有帮助。我不知道他的名字。我不会忘记的，非常感谢。：）只要不再需要
f
块，就应该将
与
块分开，这样它就可以关闭。
with open(response_local_path, 'r') as f:
    data = json.load(f)

print(data)

  with open(response_local_path, 'r') as f:
      resp = json.load(f)
      if isinstance(resp, str):
          response = json.loads(resp)

      elif isinstance(resp, dict):
          response = resp
      else:
          print(type(resp))