Question

如何仅打印文件/tmp/exceptions.log中存在的异常using python，忽略所有调试语句。异常的快照如下所示。

     Traceback (most recent call last):
       File "/usr/site/bank/views.py", line 1695, in importmydata
         o.save()
       File "/usr/site/cl/django/django/db/models/base.py", line 435, in save
         self.save_base(using=using, force_insert=force_insert, force_update=force_update)

     IntegrityError: (1048, "Column 'option_b' cannot be null")
     2011-04-14 11:57:40,895 DEBUG In exception
     2011-04-14 11:57:40,915 DEBUG No resource found
     2011-04-14 11:57:40,926 DEBUG Name
     2011-04-14 11:57:40,915 DEBUG No resource found
     2011-04-14 11:57:40,915 DEBUG No resource found
     2011-04-14 11:57:40,915 DEBUG No resource found
     2011-04-14 11:57:40,915 DEBUG No resource found
     Traceback (most recent call last):
       File "/usr/site/bank/views.py", line 1695, in importmydata
         o.save()
       File "/usr/site/cl/django/django/db/models/base.py", line 435, in save
         self.save_base(using=using, force_insert=force_insert, force_update=force_update)

     IntegrityError: (1048, "Column 'option_b' cannot be null")
     2011-04-14 11:57:40,895 DEBUG In exception
     2011-04-14 11:57:40,915 DEBUG No resource found
     2011-04-14 11:57:40,926 DEBUG Name

Answer 1

最简单的方法是使用带有排除标志的grep，例如

grep -v DEBUG /tmp/exceptions.log

这将打印不包含“DEBUG”字符串的行。

Answer 2

>>> import re
>>> pat = re.compile(r'(\w+:\s.*\n)')
>>> pat.findall(c) # c is your logs content
['IntegrityError: (1048, "Column \'option_b\' cannot be null")\n', 'IntegrityError: (1048, "Column \'option_b\' cannot be null")\n']
>>>

Answer 3

你也可以使用PyPI中提供的“logview”。如果您查看我的PyWorkbooks代码的最新版本（此处为https://sourceforge.net/projects/pyworkbooks/），则会有一个easy_log文件，用于设置日志视图应用程序的日志记录。

logview是一个优秀的gui，允许你做过滤输入等事情。

Answer 4

如果您使用的是try-except结构，则可以执行以下操作：

try:
    foo()
except Exception,ex:
    print "Exception %s"%str(ex) # Output exception
    print "Unexpected error:", sys.exc_info()[0] # Exception message
    import traceback
    traceback.print_exc() # Output full traceback if you want one

在文件中打印异常

4 个答案: