Bypass Python IOError while disconnected from network?

Question

Hi there does any one know how can i pass thru IOError? Basicly i have python script that is trying to scraping/getting data from my website via urllib. But when i am disconnected from network i got:

IOError: [Errno socket error] [Errno 10060] A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond

How can i tell to python - keep trying until I will be connected?

for example:

currtokenurl = "http://www.example.com/heady"

f = urllib.urlopen(currtokenurl)
currtoken = f.read()

Thanks.

Answer 1

Put it in a loop so that you can catch the error and retry. Many errors should not be retried, so create a list of the ones you like.

import time
import errno

retry_this = [errno.ETIMEOUT,]

currtokenurl = "http://www.example.com/heady"

while True:
    try:
        f = urllib.urlopen(currtokenurl)
        break
    except IOError, e:
        if e.errno in retry_this:
            time.sleep(10)
        else:
            raise
currtoken = f.read()

It could be that the remote end is not connected, so you may want a way to limit this while loop and give up completely.