Redirecting stdin/stdout on Windows with '>'and '<'

[Gordon McMillan]

Mark <markmcmahon at my-deja.com> wrote:

> I seem to have a problem and can't find it in the archives or FAQ.

Not sure why not. It's come up enough times.
 
> I would like to redirect output of my script with '>' or '<'
> 
> If I try to redirect out then the file is created but has no contents.
> 
> If I try to redirect in eg...
> "test.py < autoexec.bat"
> 
> I get the following traceback
> 
> Traceback (most recent call last):
>   File "C:\test.py", line 4, in ?
>     s = sys.stdin.read()
> IOError: [Errno 9] Bad file descriptor
> 
> Does anybody have an idea!!!
> 
> (Windows nt 4 sp 6, python 1.52)

Apparently the bug is fixed in Win2K, but in NT and Win9x, 
redirection is busted unless you spell it out:
 python test.py >test.out


- Gordon