无法解析json文件，表示无法解码任何json对象

Question

我有一个json转储为

{
  "alarm": [
    {
      "ackId": 16,
      "count": 1,
      "description": "<p>A SSH outage was identified on interface\n      10.21.5.39.</p> <p>A new Outage record has been\n      created and service level availability calculations will be\n      impacted until this outage is resolved.</p>",
      "firstEventTime": 1495277308427,
      "id": 16,
      "ifIndex": null,
      "ipAddress": "10.21.5.39",
      "lastEvent": {
        "createTime": 1495277308437,
        "description": "<p>A SSH outage was identified on interface\n      10.21.5.39.</p> <p>A new Outage record has been\n      created and service level availability calculations will be\n      impacted until this outage is resolved.</p>",
        "display": "Y",
        "host": "opennms",
        "id": 625,
        "ifIndex": null,
        "ipAddress": "10.21.5.39",
        "log": "Y",
        "logMessage": "SSH outage identified on interface 10.21.5.39 with reason code: Connection refused (Connection refused).",
        "nodeId": 9,
        "nodeLabel": "fra01-api-01",
        "parameters": [
          {
            "name": "eventReason",
            "type": "string",
            "value": "Connection refused (Connection refused)"
          }
        ],
        "serviceType": {
          "id": 5,
          "name": "SSH"
        },
        "severity": "MINOR",
        "source": "OpenNMS.Poller.DefaultPollContext",
        "time": 1495277308427,
        "uei": "uei.opennms.org/nodes/nodeLostService"
      },
      "lastEventTime": 1495277308427,
      "logMessage": "SSH outage identified on interface 10.21.5.39 with reason code: Connection refused (Connection refused).",
      "managedObjectInstance": null,
      "managedObjectType": null,
      "nodeId": 9,
      "nodeLabel": "fra01-api-01",
      "ossPrimaryKey": null,
      "parameters": [
        {
          "name": "eventReason",
          "type": "string",
          "value": "Connection refused (Connection refused)"
        }
      ],
      "qosAlarmState": null,
      "reductionKey": "uei.opennms.org/nodes/nodeLostService::9:10.21.5.39:SSH",
      "serviceType": {
        "id": 5,
        "name": "SSH"
      },
      "severity": "MINOR",
      "suppressedTime": 1495277308427,
      "suppressedUntil": 1495277308427,
      "type": 1,
      "uei": "uei.opennms.org/nodes/nodeLostService",
      "x733AlarmType": null,
      "x733ProbableCause": 0
    }
  ],
  "count": 1,
  "offset": null,
  "totalCount": 1
}

我编写了一个小代码来从json获取一些详细信息

def get_nodes_opennms():
    headers={'Accept': 'application/json' }
    x = requests.get('http://localhost:8980/opennms/rest/alarms?comparator=ge&severity=MINOR?limit=0',headers=headers , auth=('admin', 'Op3AD'))
    parsed = json.loads(x.content)
    #print json.dumps(parsed, indent=4, sort_keys=True)
    wriet_me_to_file = json.dumps(parsed, indent=4, sort_keys=True)
    f=open('out.txt', 'w')
    f.write(wriet_me_to_file)
    for i in json.load(open('out.txt'))["alarm"]:
        try:
            print (["ipAddress"])
            print (["logMessage"])
        except Exception as e:
          print "something is wrong"

这给我造成了错误：

回溯（最近一次调用）：文件“python_opennms.py”，第24行，in x=get_nodes_opennms()文件“python_opennms.py”，第15行，in get_nodes_opennms for i in JSON.load(open('out.txt'))[“alarm”]:文件“/usr/lib/python2.7/JSON/init.py”，第291行，in load**kw)文件“/usr/lib/python2.7/JSON/init.py”，第339行，in load return_default_decoder.decode文件“/usr/lib/python2.7/JSON/decoder.py”，第364行，在decode obj中，end=self.raw_decode(s,idx=_w(s,0).end())文件“/usr/lib/python2.7/JSON/decoder.py”，第382行，在raw_decode中提高ValueError（“No JSON object could be decoded”）ValueError：No JSON object could be decoded“

有人能帮忙吗

Answer 1

您正在打开写入后未关闭的文件。可能是系统没有将流缓冲区完全刷新到磁盘，所以open('out.txt')遇到了内容不完整的文件。

最好和最安全的方法是：

with open('out.txt', 'w') as f:
    f.write(wriet_me_to_file)
for i in json.load(open('out.txt'))["alarm"]: