Handling 3 operands in an expression without raising an exception

[Nobody]

On Thu, 26 Sep 2013 10:26:48 +0300, Νίκος wrote:

> How can i wrote the two following lines so for NOT to throw out
> KeyErrors when a key is missing?
> 
> city = gi.time_zone_by_addr( os.environ['HTTP_CF_CONNECTING_IP'] ) or
> gi.time_zone_by_addr( os.environ['REMOTE_ADDR'] ) or
> "Άγνωστη Πόλη"

tz = None
ip = os.environ.get('HTTP_CF_CONNECTING_IP')
if ip:
  tz = gi.time_zone_by_addr(ip)
if not tz:
  ip = os.environ.get('REMOTE_ADDR')
  if ip:
    tz = gi.time_zone_by_addr(ip)
if not tz:
  tz = "ÎγνÏÏÏη Î Ïλη"

Likewise for the hostname.