如何在日志库中显示确切的行号（发生错误的位置）答案

【问题标题】：how to display exact line number (where the error has occured) in logging library如何在日志库中显示确切的行号（发生错误的位置）
【发布时间】：2016-07-30 06:22:42
【问题描述】：

在下面的代码中，错误出现在第 7 行。但是，日志在第 10 行显示错误，其中提到了日志记录。

import logging
import urllib2
logging.basicConfig(filename='example.log',level=logging.DEBUG,format='%(levelname) -10s %(asctime)s %(module)s:%(lineno)s %(funcName)s %(message)s')
def main():
    try:
        urls = "http://www.simplyhired.com/a/job-detaw/jobkey-67b4efe169eee7b2cf2ed47d49b1845070ea37/rid-racliggzfyjgqwfzrlvnqyjtcserhrri/cjp-3/pub_id-1002"
        site = urllib2.urlopen(urls).read()
        mathfail = 1/0
    except Exception, e:
        logging.critical(str(e))

main()

日志中显示如下：

CRITICAL   2016-04-08 15:28:47,063 testt:10 main HTTP Error 404: Not Found

我希望它显示发生错误的行号，而不是提到日志记录的行号。它应该显示第 7 行而不是第 10 行

【问题讨论】：

标签： python exception logging exception-handling error-logging

【解决方案1】：

我认为您正在寻找堆栈跟踪

import logging
import urllib2
import traceback
logging.basicConfig(filename='example.log',level=logging.DEBUG,format='%(levelname) -10s %(asctime)s %(module)s:%(lineno)s %(funcName)s %(message)s')
def main():
    try:
        urls = "http://www.simplyhired.com/a/job-detaw/jobkey-67b4efe169eee7b2cf2ed47d49b1845070ea37/rid-racliggzfyjgqwfzrlvnqyjtcserhrri/cjp-3/pub_id-1002"
        site = urllib2.urlopen(urls).read()
        mathfail = 1/0
    except Exception:
        logging.critical(traceback.format_exc())

main()

【讨论】：

这不是我要找的。它必须是日志。
@dsl1990 你可以把它改成 logging.critical(traceback.format_exc())

【解决方案2】：

这给了我预期的输出：

import logging
import urllib2
logging.basicConfig(filename='example.log',level=logging.DEBUG,format='%(levelname) -10s %(asctime)s %(module)s:%(lineno)s %(funcName)s %(message)s')
def main():
    try:
        urls = "http://www.simplyhired.com/a/job-detaw/jobkey-67b4efe169eee7b2cf2ed47d49b1845070ea37/rid-racliggzfyjgqwfzrlvnqyjtcserhrri/cjp-3/pub_id-1002"
        site = urllib2.urlopen(urls).read()
        mathfail = 1/0
    except Exception, e:
        logging.exception(str(e))

main()

日志文件中的输出是：

ERROR      2016-04-08 16:18:35,430 testt:10 main HTTP Error 404: Not Found
Traceback (most recent call last):
  File "testt.py", line 7, in main
    site = urllib2.urlopen(urls).read()
  File "/home/deepu/anaconda/lib/python2.7/urllib2.py", line 154, in urlopen
    return opener.open(url, data, timeout)
  File "/home/deepu/anaconda/lib/python2.7/urllib2.py", line 437, in open
    response = meth(req, response)
  File "/home/deepu/anaconda/lib/python2.7/urllib2.py", line 550, in http_response
    'http', request, response, code, msg, hdrs)
  File "/home/deepu/anaconda/lib/python2.7/urllib2.py", line 475, in error
    return self._call_chain(*args)
  File "/home/deepu/anaconda/lib/python2.7/urllib2.py", line 409, in _call_chain
    result = func(*args)
  File "/home/deepu/anaconda/lib/python2.7/urllib2.py", line 558, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
HTTPError: HTTP Error 404: Not Found

【讨论】：