question for sys.stdout

[Leon]

"stdout" is file object, it open mode is "w"
and it have a close() fuction.....
while it run close(), how to reopen it

because I want to do rewrite it
stdout content update

 

[Pierre Barbier de Reuille]

If you want to "rewrite" a "stdout" object, just write a file-like
object and replace sys.stdout !

Then don't care about the old stdout anymore ... it's a pipe and it
won't bother you anymore

Another way to do so is the "C" way ... ie. using os.dup2. The advantage
of the "dup2" method is the replacement of the stdout of the whole
program (so, if you use external functions writing in stdout it will
work), but the drawback is you need to have a real file (ie. file, pipe,
....)

Depends on what you want to use

Leon a écrit :

 

[Leon]

sorry....
how to replace sys.stdout to file-like object ?
I use os module fdopen() and file object fileno()
stdout = os.fdopen(sys.stdout.fileno(),"w")
or
stdout = os.fdopen(os.dup(sys.stdout.fileno()),"w")

it still can't do rewrite, it result is append content

..>_<. Please help me

 

[Diez B. Roggisch]

how to replace sys.stdout to file-like object ?

sys.stdout = open("/this/is/so/simple", "w")

 

[Pierre Barbier de Reuille]

MMmhh ... I'm not sure what you _really_ want to do ???

You want to replace stdout by a custom file-like object ? Because I
don't see what you call "doing rewrite" ... You should give a clear
example of the behaviour you want.

Pierre

Leon a écrit :