real time updating of popen, bufsize=0 problems

[Rob Wolfe]

"ianaré" <ianare at gmail.com> writes:

> hey all, I'm trying to get real time updates of batch file output.

[...]

> So I tried subprocess:
> proc = subprocess.Popen('"C:/path/to/test.bat"', bufsize=0,
>   stdout=subprocess.PIPE)

Instead of that:

> for line in proc.stdout:
>     self.display.WriteText(line)

try that:

while True:
    line = proc.stdout.readline()
    if not line: break
    self.display.WriteText(line)


When a file is used in a for loop it works like an iterator. 
You can read details here (description of method ``next``):
http://docs.python.org/lib/bltin-file-objects.html

-- 
HTH,
Rob