Non-blocking subprocess call

[Kevin Walzer]

I'm currently using os.popen in an application of mine, which calls for
non-blocking data, in this fashion:

self.file = os.popen('echo %s | sudo -S /sw/bin/fink -y install %s' %
(self.passtext, self.packagename), 'r', os.O_NONBLOCK)

What is the equivalent/comparable call in the new subprocess module? I
can't find any reference in the Python docs to non-blocking streams.

 

[Josiah Carlson]

I'm currently using os.popen in an application of mine, which calls for
non-blocking data, in this fashion:

self.file = os.popen('echo %s | sudo -S /sw/bin/fink -y install %s' %
(self.passtext, self.packagename), 'r', os.O_NONBLOCK)

What is the equivalent/comparable call in the new subprocess module? I
can't find any reference in the Python docs to non-blocking streams.

If you are talking about non-blocking reading and writing from the
subprocess, there isn't natively. But there is a cookbook entry:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440554

- Josiah

 

[Kevin Walzer]

If you are talking about non-blocking reading and writing from the
subprocess, there isn't natively. But there is a cookbook entry:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440554

- Josiah

Any idea why this feature was removed from the language? It seems pretty
essential to me.

 

[Nick Craig-Wood]

I'm currently using os.popen in an application of mine, which calls for
non-blocking data, in this fashion:

self.file = os.popen('echo %s | sudo -S /sw/bin/fink -y install %s' %
(self.passtext, self.packagename), 'r', os.O_NONBLOCK)

What is the equivalent/comparable call in the new subprocess module? I
can't find any reference in the Python docs to non-blocking
streams.

You'll probably be better off with the pexpect module for this

http://pexpect.sourceforge.net/

Doesn't work on windows. Looks like you are doing OS X though so
should work fine there