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python traceback模块

 2 years ago
source link: https://www.hi-roy.com/posts/python-traceback%E6%A8%A1%E5%9D%97/
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python traceback模块

2013-11-14

如果我们再程序中写出一个会引发异常的代码，比如1/0，就会引发一个异常，程序中止。

Traceback (most recent call last):
  File "trackbacks.py", line 1, in <module>
    1/0
ZeroDivisionError: integer division or modulo by zero
Shell 已返回1

为了程序的健壮性，我们常常加入异常处理。

try:
    1/0
except:
    print "error"

这样，程序就会输出error后正常退出。那么为了能处理异常而又看见异常信息的话就要用到traceback模块了：

import traceback
try:
    1/0
except:
    print "error"
    print traceback.format_exc()

error
Traceback (most recent call last):
  File "trackbacks.py", line 4, in <module>
    1/0
ZeroDivisionError: integer division or modulo by zero

也可以把信息输出到文件中，具体看 http://docs.python.org/2/library/traceback.html

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