使用以下代码，将文件转储到.json文件中，然后再次读取以创建响应，则出现ValueError。
with open(key, 'w+') as outfile:
if content_as_json:
json.dump(file, outfile)
response = self._createStoreResponse(status_code=200, content = json.load(outfile))
else:
outfile.write(file)
response = self._createStoreResponse(status_code=200, content = outfile.readlines())
追溯在底部。我可以确认该文件实际上是创建的。如果我做一只猫，它看起来像一个有效的json文件。参见：
/nubera$ cat test_svx-environment.json │
{"type": "test_sv", "name": "test_svx-environment", "description": "Testing ground environment of test_sv"}
event: None │
__format_message event: None │
event: unknown, log_type: info, message: No document found yet. Creating document with data: {"type": "test_sv", "name": "test_svx-environment", "description": "Testing ground environment of test│
_sv"} │
event: None │
__format_message event: None │
event: unknown, log_type: info, message: LocalFileSystemStore: Doing put on:/database/nubera . For File: {"type": "test_sv", "name": "test_svx-environment", "description": "Testing ground environ│
ment of test_sv"} │
[2019-05-22 10:38:56,452] ERROR in app: Exception on /types/test_sv [POST] │
Traceback (most recent call last): │
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1813, in full_dispatch_request │
rv = self.dispatch_request() │
File "/usr/local/lib/python2.7/site-packages/flask/app.py", line 1799, in dispatch_request │
return self.view_functions[rule.endpoint](**req.view_args) │
File "/usr/local/lib/python2.7/site-packages/flask_restplus/api.py", line 325, in wrapper │
resp = resource(*args, **kwargs) │
File "/usr/local/lib/python2.7/site-packages/flask/views.py", line 88, in view │
return self.dispatch_request(*args, **kwargs) │
File "/usr/local/lib/python2.7/site-packages/flask_restplus/resource.py", line 44, in dispatch_request │
resp = meth(*args, **kwargs) │
File "./api/types_api.py", line 61, in post │
File "./manager/document_manager.py", line 37, in write_type_document │
File "./configuration_store/local_file_system_store.py", line 68, in put │
File "/usr/local/lib/python2.7/json/__init__.py", line 291, in load │
**kw) ├─────────────────────────────────────────
File "/usr/local/lib/python2.7/json/__init__.py", line 339, in loads │ sven ~ .ssh
return _default_decoder.decode(s) │
File "/usr/local/lib/python2.7/json/decoder.py", line 364, in decode │
obj, end = self.raw_decode(s, idx=_w(s, 0).end()) │
File "/usr/local/lib/python2.7/json/decoder.py", line 382, in raw_decode │
raise ValueError("No JSON object could be decoded") │
ValueError: No JSON object could be decoded
答案 0 :(得分：1)
在可以从文件加载JSON之前，您需要正确编写它。含义之一：
with上下文需要完成，以便调用outfile.close()。 在使用json.load之前，您还需要打开文件句柄进行读取。
with open(key, 'w+') as outfile:
json.dump(file, outfile)
with open(key, 'r') as infile:
reread_data = json.load(infile)