[ Python 常見問題 ] Log exception with traceback

Source From Here 
Question 
How can I log my Python errors? 

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1. try:  
2.     do_something()  
3. except:  
4.     # How can I log my exception here, complete with its traceback?  

How-To 
Use logging.exception from with an except: handler to log the current exception, prepended with a message. 

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1. import logging  
2. LOG_FILENAME = '/tmp/logging_example.out'  
3. logging.basicConfig(filename=LOG_FILENAME, level=logging.DEBUG)  
4.   
5. logging.debug('This message should go to the log file')  
6.   
7. try:  
8.     run_my_stuff()  
9. except:  
10.     logging.exception('Got exception on main handler')  
11.     raise  

Now looking at the log file, /tmp/logging_example.out: 

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1. DEBUG:root:This message should go to the log file  
2. ERROR:root:Got exception on main handler  
3. Traceback (most recent call last):  
4.   File "/tmp/teste.py", line 9, in   
5.     run_my_stuff()  
6. NameError: name 'run_my_stuff' is not defined