发布于 2015-08-30 07:53:14 | 95 次阅读 | 评论: 0 | 来源: 网络整理
Simply use the raise statement all by itself. For example:
>>> def example():
... try:
... int('N/A')
... except ValueError:
... print("Didn't work")
... raise
...
>>> example()
Didn't work
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "<stdin>", line 3, in example
ValueError: invalid literal for int() with base 10: 'N/A'
>>>
This problem typically arises when you need to take some kind of action in response to an exception (e.g., logging, cleanup, etc.), but afterward, you simply want to propagate the exception along. A very common use might be in catch-all exception handlers:
# Process exception information in some way ...
# Propagate the exception raise