[pygtk] Updating a TextBuffer line by line

Daniel Roesler diafygi at gmail.com
Fri Jan 23 03:25:27 WST 2009

Howdy again,

I am running into a problem displaying stdout from a subprocess
command. I have a loop that checks to see if the subprocess is still
active, then reads a line in from stdout and sends it to the text
buffer. However, I can't seem to get my text buffer to print except
when the command ends. Obviously, I'm missing some logic behind how
loops work with pygtk.

Here's my code:
command = subprocess.Popen(cmd, stdout=subprocess.PIPE)

while command.poll() is None:
      line = command.stdout.readline()

Any ideas on how to read stdout line by line with subprocesses?

Daniel Roesler
diafygi at gmail.com

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