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Accepted
Stephen Boston
Asked: 2019-10-07 19:07:52 +0800 CST

journalctl json 输出破坏了 python 的 json 解析器

  • 772

Ubuntu 19.04 蟒蛇 3.7

创建一个json文件：

journalctl -ojson -r > a.json

现在阅读：

with open('a.json') as infile :
   data = json.load(infile)

Traceback (most recent call last):
  File "journalctl.json.py", line 4, in <module>
data = json.load(infile)
  File "/usr/lib/python3.7/json/__init__.py", line 296, in load
parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
  File "/usr/lib/python3.7/json/__init__.py", line 348, in loads
return _default_decoder.decode(s)
  File "/usr/lib/python3.7/json/decoder.py", line 340, in decode
raise JSONDecodeError("Extra data", s, end)
json.decoder.JSONDecodeError: Extra data: line 2 column 1 (char 985)

这是第 2 行

{"_HOSTNAME":"vaio","_CAP_EFFECTIVE":"3fffffffff","_SELINUX_CONTEXT":"unconfined\n","_COMM":"anacron","_SYSTEMD_UNIT":"anacron.service","MESSAGE":"Normal exit (0 jobs run)","_SOURCE_REALTIME_TIMESTAMP":"1570415470605362","SYSLOG_FACILITY":"9","_BOOT_ID":"06344b4eb91344bf8c1ce7c49f77ee5d","_UID":"0","PRIORITY":"5","__CURSOR":"s=2b70948bafe3422ca5fa14213e18cda1;i=3c78c;b=06344b4eb91344bf8c1ce7c49f77ee5d;m=83ae2587;t=59448d8467447;x=24f85cc398f54cab","_PID":"22196","SYSLOG_IDENTIFIER":"anacron","_SYSTEMD_INVOCATION_ID":"3cc36dc0214b4f98a311fc110648019e","__MONOTONIC_TIMESTAMP":"2209228167","_CMDLINE":"/usr/sbin/anacron -d -q -s","_SYSTEMD_CGROUP":"/system.slice/anacron.service","_MACHINE_ID":"dc7bf55ee6014b7db63fba929237b2c9","_TRANSPORT":"syslog","_GID":"0","SYSLOG_TIMESTAMP":"Oct  6 19:31:10 ","__REALTIME_TIMESTAMP":"1570415470605383","_EXE":"/usr/sbin/anacron","SYSLOG_PID":"22196","_SYSTEMD_SLICE":"system.slice"}
python systemd-journald json

2 个回答

  1. import json

    lines = []
    with open('C:\\Users\\Owner\\Desktop\\jsondata.txt','r') as file:
        for line in file:
            lines.append(json.loads(line))
        print(lines)
    • 2
  2. Best Answer

    你收到一个错误。json.decoder.JSONDecodeError: Extra data error. 原因是 load 方法只能处理单个 JSON 对象。而且您的文件似乎包含多个 JSON 对象。使用以下代码解析具有多个对象的 JSON 文件

    jsonData = []
with open('a.json') as f:
    jsonData = [json.loads(line) for line in f]
print(jsonData)
    • 2

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