eb303 a écrit :
On Apr 19, 2:20 pm, AlienBaby <matt.j.war...@gmail.com> wrote:
Hi,
just a quick one,
Is it possible to achieve a default value in a list comprehension
where the if-clause is false?
Ie, something similar to:
[ a for a in b if something(a) else 'default' ]
the idea being that, rather than skip a value if the if-clause is
false, to place a default value at that position in the returned list
instead.
?
Thanks,
Matt.
[a if something(a) else 'default' for a in b]
Or you could have "something" taking a "default" argument and returning
either it's argument (instead of True) or the "default" one (instead of
False), and get rid of the if/else test in the list comp, ie:
def something(obj, default=False):
if whatever(obj):
return obj
else:
return default
results = [something(a, default="default") for a in b]
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