Python not getting IP if cable connected after script has started

Question

I hope this doesn\'t cross into superuser territory.

So I have an embedded linux, where system processes are naturally quite stripped. I\'m not quite sure which syst

Answer 1

it might be that one of the python modules is caching the state of the network, and so it isn't using the latest settings. Try and reload all the network related modules. A simple example of this is:

import sys, socket, urllib

for i in [sys, socket, urllib]:
    reload(i)

if that doesn't work look around in sys.modules to see what else got imported, and try more modules there. A more extreme version of the reloading would be the code below, that you could try as a last ditch effort.

code

import sys
print 'reloading %s modules ' % len(sys.modules)
for name, module in sys.modules.items():
    try:
        reload(module)
    except:
        print 'failed to import %s' % name

output

reloading 42 modules 
failed to import __main__
failed to import encodings.encodings
failed to import encodings.codecs
failed to import lazr
failed to import encodings.__builtin__