from socket import *
import sys

def test(addr):
    print "entering test, gethostbyaddr(%r)" % addr
    print "Press Ctrl-C at any time"
    try:
        try:
            result = gethostbyaddr(addr)
        except:   
            print "caught in inner try"
            E = sys.exc_info()[0]
            print type(E),repr(E),E is KeyboardInterrupt
            raise
    except:   
        print "caught in outer try"
        E = sys.exc_info()[0]
        print type(E),repr(E),E is KeyboardInterrupt
    print "exit test"

setdefaulttimeout(30)
addr = len(sys.argv)>1 and sys.argv[1] or "19.20.21.21"
test(addr)