Serge Matveenko schrieb:
On 10/9/08, Serge Matveenko <[EMAIL PROTECTED]> wrote:
I need to put in the var property of the first object from the list
that is not None. Somth like:
foo = first_of([any, beny, riki,]).name
Dont want to ugly if-cascade:
foo = any.name if name is not None else beny.name if beny is not None \
else riki.name if riki is not None
after some play with interpreter and Python logic i've got this:
objs = [None, 'dfgh', None,]
obj_l = [obj.__len__() for obj in objs if obj is not None][0]
The usual way to compute the len is to use
len(obj)
Now the question is this is lazy or not? And how could i make it lazy?
No, it's not. You could make it a generator expression:
obj_l = (len(obj) for obj in objs if obj is not None).next()
Diez
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