Handling 3 operands in an expression without raising an exception
Antoon Pardon
antoon.pardon at rece.vub.ac.be
Thu Sep 26 06:12:23 EDT 2013
Op 26-09-13 11:56, Νίκος schreef:
> 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
>>> "ÎγνÏÏÏη Î Ïλη"
>>
>> 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:
No it is not and you prove that in the very next line.
> it doens't work though:
If it doesn't do what you think it should do then it is not straight
forward or clear, at least not to you.
--
Antoon Pardon
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