回复: Re: Need your help

1011_wxy 1011_wxy at 163.com
Fri Apr 29 03:31:02 CEST 2011


Dear Thomas,JM,Chris Rebert:

I got it. Thank you very very very much.


Best Regards

2011-04-29



1011_wxy



发件人: Thomas Rachel <nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915 at spamschutz.glglgl.de>
发送时间: 2011-04-28 21:26
主 题: Re: Need your help
收件人: python-list at python.org



Am 28.04.2011 13:14, schrieb Chris Rebert: 

> import a, b, sys 
> def c(): 
>      orig_stdout = sys.stdout 
>      sys.stdout = open('my_log_file.log', 'w') 
>      a.a() 
>      b.b() 
>      sys.stdout.close() 
>      sys.stdout = orig_stdout 
> 
> 
> Someone may have written a with-statement context manager that 
> abstracts away the swapping. 

@contextlib.contextmanager 
def swap_stdout(target): 
     orig_stdout = sys.stdout 
     sys.stdout = target 
     try: 
         yield target 
     finally: 
         sys.stdout = orig_stdout 

In this case, I can use all kinds of files (open() files, StringIO  
objects etc.), and can re-use them if necessary, in order to  
prepend/append data. 

Closing can happen additionally, if the user wants. 


Thomas 
--  
http://mail.python.org/mailman/listinfo/python-list 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-list/attachments/20110429/c35d48ad/attachment.html>


More information about the Python-list mailing list