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+4 A:

localhost should always return 127.0.0.1 in ip4, '::1' in ip6, so of course it's not going to be useful -- it's the loopback interface, not the ethernet card or whatever;-).

Personally, I'd use subprocess.Popen to run ifconfig and parse the results (it's spelled ipconfig in Windows) -- not ideal, but pretty practical, IMNSHO;-).

Alex Martelli 2010-08-20 02:22:27

Indeed. I suppose it would be a simple matter to search for 'inet addr:' in the response.

directedition 2010-08-20 02:27:06

@direct, unfortunately depends a bit on the platform (e.g., on my Mac ifconfig says `inet 192.168.1.75` and the like, no `addr:` there), but it should be feasible to concoct either a smart-ish RE to match on various platforms, or a platform-dependent simple string check (you need to be a little platform dependent anyway to say `ifconfig` on unix and `ipconfig` on windows, after all).

Alex Martelli 2010-08-20 03:06:42

use `ip` commands - ifconfig is deprecated. You could also try querying NetworkManager on Linux as a first try, then fall back on parsing the output of `ip addr`.

MikeyB 2010-08-20 05:15:05

thanks mikeyb, I've gone with: while('state UP' in subprocess.Popen(['ip','addr']):

directedition 2010-08-20 17:02:11

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Determine local connectivity in python

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