Trinary operator?

[Grant Edwards]

In article <a9ki3d$jip$1 at nets3.rz.RWTH-Aachen.DE>, Philipp Lenssen wrote:
> "Philipp Lenssen" <lenssen at hitnet.rwth-aachen.de> wrote in message
> news:a9khoc$j7h$1 at nets3.rz.RWTH-Aachen.DE...
>>..
>> The three commented lines above would not have been needed if I'd use
>> something like '... name="' + (key != 'station') ? key : 'station' + '"
> ...'
>>..
> 
> That should be '... name="' + (key != 'station') ? key : 'lastStation' + '"
> ...'
> 
> Or since I sometimes prefer testing in a positive way rather than the most
> likey, '... name="' + (key == 'station') ? 'lastStation' : key + '" ...'

There's a dictionary lookup method called get() you can use
where you can specify the value to be returned if the key
doesn't exist. Using your previous example:

>>> shorthand = {'m':'male', 'f':'femail'}
>>> key = 'm'
>>> shorthand.get(key,key)
'male'
>>> key = 'whatever'
>>> shorthand.get(key,key)
'whatever'

-- 
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