On Fri, 24 Jun 2005 21:04:15 +0200, Christophe Delord wrote:
> Hello,
>
> On 24 Jun 2005 11:45:14 -0700, [EMAIL PROTECTED] wrote:
>
>> Hello,
>>
>> Can we impose if then else into list comprehension ?
>> Like we do in lambda-map form:
>>
>> This code change None into 0
>> L = [None, 12]
>> R = map(lambda x: (x==None and [0] or x)[0], L) # [0,12]
>>
>
> Do you mean:
> [(x==None and [0] or [x])[0] for x in L]
> or [{None:0}.get(x,x) for x in L]
> or [x or 0 for x in L]
>
> Well, the third solution doesn't exactly fit the specification but may
> be easier to read.
Or, more generally,
[0 for x in L if x is None]
which doesn't solve the asked-for question, but is a useful feature.
--
Steven.
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