如何将traceback / sys.exc_info（）值保存在变量中？

问题描述

我想将错误名称和追溯详细信息保存到变量中。这是我的尝试。

I want to save the name of the error and the traceback details into a variable. Here's is my attempt.

import sys
try:
    try:
        print x
    except Exception, ex:
        raise NameError
except Exception, er:
    print "0", sys.exc_info()[0]
    print "1", sys.exc_info()[1]
    print "2", sys.exc_info()[2]

输出：

0 <type 'exceptions.NameError'>
1
2 <traceback object at 0xbd5fc8>

所需产出

0 NameError
1
2 Traceback (most recent call last):
  File "exception.py", line 6, in <module>
    raise NameError

我知道这可以很容易地使用追溯模块，但我想知道sys.exc_info（）[2]对象的用法。

P.S. I know this can be done easily using the traceback module, but I want to know usage of sys.exc_info()[2] object here.

推荐答案

这是我如何做的：

>>> import traceback
>>> try:
...   int('k')
... except:
...   var = traceback.format_exc()
...
>>> print var
Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
ValueError: invalid literal for int() with base 10: 'k'

不过请查看，因为您可能会找到更合适的方法，具体取决于您想要的方式稍后处理您的变量...

You should however take a look at the traceback documentation, as you might find there more suitable methods, depending to how you want to process your variable afterwards...

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