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From: candide on 4 Dec 2009 18:31
How do I redirect stdin to a text file ? In C, this can be done with the
freopen() standard function, for instance

FILE *foo = freopen("in.txt", "r", stdin);


redirects stdin to the in.txt text file. Does anyone know a freopen()
Python equivalent ?

Notice that I'm not referring to shell redirection as the following
command line shows :

$ python myCode.py < in.txt

I need to hardcode the redirection inside the python source file.
From: Lie Ryan on 4 Dec 2009 18:57
On 12/5/2009 10:31 AM, candide wrote:
> How do I redirect stdin to a text file ? In C, this can be done with the
> freopen() standard function, for instance
>
> FILE *foo = freopen("in.txt", "r", stdin);
>
>
> redirects stdin to the in.txt text file. Does anyone know a freopen()
> Python equivalent ?
>
> Notice that I'm not referring to shell redirection as the following
> command line shows :
>
> $ python myCode.py< in.txt
>
> I need to hardcode the redirection inside the python source file.

I'm not sure how freopen() works in C, but perhaps you're looking for
redirecting sys.stdin:
import sys
old_stdin = sys.stdin # save it, in case we need to restore it
sys.stdin = open('myfile')

you can also restore stdin using sys.__stdin__ instead of saving the old
one, but in the case you or someone else is redirecting the stdin twice...
From: MRAB on 4 Dec 2009 18:59
candide wrote:
> How do I redirect stdin to a text file ? In C, this can be done with
> the freopen() standard function, for instance
>
> FILE *foo = freopen("in.txt", "r", stdin);
>
>
> redirects stdin to the in.txt text file. Does anyone know a freopen()
> Python equivalent ?
>
> Notice that I'm not referring to shell redirection as the following
> command line shows :
>
> $ python myCode.py < in.txt
>
> I need to hardcode the redirection inside the python source file.

The standard input is sys.stdin and the standard output is sys.stdout.

sys.stdin.close()
sys.stdin = open("in.txt", "r")
From: candide on 4 Dec 2009 19:29
@MRAB
@Lie Ryan

Thanks, it works fine !
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