Read/Write from/to a process

[jas]

Steve Holden wrote:
> Look at how you might do it in other languages. Then you'll realise this
> isn't (just) a Python problem.

Yea your right.  However, for example, in Java, one can use the Process
class, and then read from the stream until its the end (i.e. -1 is
returned).  However, with Python when reading from
subprocess.Popen.stdout ...I don't know when to stop (except for
looking for a ">" or something).  Is there a standard, like read until
"-1" or something?

As I mentioned, os.system("cmd") gives me exactly the
output/interactivity I need...but I can't redirect the output.

Thanks.