如何在变量中保存回溯/sys.exc_info() 值? [英] How to save traceback / sys.exc_info() values in a variable?

问题描述

我想将错误名称和回溯详细信息保存到一个变量中.这是我的尝试.

导入系统尝试:尝试:打印 x除了例外，例如:引发 NameError除了例外，呃:打印0"，sys.exc_info()[0]打印1"，sys.exc_info()[1]打印2"，sys.exc_info()[2]

输出:

0 12 <在0xbd5fc8处的回溯对象>

期望输出:

0 NameError12 回溯(最近一次调用最后一次): 中的文件exception.py"，第 6 行引发 NameError

附言我知道这可以使用回溯模块轻松完成，但我想知道这里 sys.exc_info()[2] 对象的用法.

解决方案

我是这样做的:

<预><代码>>>>导入回溯>>>尝试:... int('k')... 除了:... var = traceback.format_exc()...>>>打印变量回溯(最近一次调用最后一次):文件<stdin>"，第 2 行，在 <module> 中ValueError:int() 的无效文字，基数为 10:'k'

然而，您应该查看 traceback 文档，因为您可能会找到更合适的方法，具体取决于之后如何处理变量...

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]

Output:

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

Desired Output:

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

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.

解决方案

This is how I do it:

>>> 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'

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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