Re: Handling 3 operands in an expression without raising an exception

[Νίκος]

Στις 26/9/2013 11:55 πμ, ο/η Nobody έγραψε:
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.


Its logic is simple and straightforward but too many lines:

host = socket.gethostbyaddr( os.environ.get('HTTP_CF_CONNECTING_IP') or 
os.environ.get('REMOTE_ADDR') or  "Άγνωστη Προέλευση" )

this is much better in my opinion and straighforward also and more clear 
to read:

it doens't work though:

ima thinkin that the [0] is missign at the end so i cna grab the first 
item of the returnign tuple:

host = socket.gethostbyaddr( os.environ.get('HTTP_CF_CONNECTING_IP') or 
os.environ.get('REMOTE_ADDR') or  "Άγνωστη Προέλευση" )[0]

for the first two element if they are beign return i cna understand the 
[0] at the end but what about if the string is being return wouldnt that 
return just the 'A' of the string?

Is it correct to write it liek this?


--
https://mail.python.org/mailman/listinfo/python-list