what is the best way to multiply a tuple or list by a given value
exp.
multiply (4, 5) by 2 => (8, 10)
cheers
jr 4 4736
Jim Red wrote: what is the best way to multiply a tuple or list by a given value
exp. multiply (4, 5) by 2 => (8, 10)
cheers
jr
i.e.: import operator [ operator.mul(x, 2) for x in (4,5)]
regards,
Karl
Jim Red wrote: what is the best way to multiply a tuple or list by a given value
exp. multiply (4, 5) by 2 => (8, 10)
something like this?
import types
def multiply_sequen ce(sequence, multiplier):
new_sequence = map(lambda item: item*multiplier , sequence)
if type(sequence) == types.TupleType :
return tuple(new_seque nce)
elif type(sequence) == types.ListType:
return new_sequence
--
Pádraig Brady - http://www.pixelbeat.org
> >>> import operator >>> [ operator.mul(x, 2) for x in (4,5)]
Why not simply * ?
[ x * 2 for x in (4,5)]
And you might surround it by tuple to gain a tuple
tuple([ x * 2 for x in (4,5)])
Another way would be to use Numeric
import Numeric
a = Numeric.array(( 10,2), Numeric.Float32 )
a = a * 2
--
Regards,
Diez B. Roggisch
Diez B. Roggisch wrote: >>> import operator >>> [ operator.mul(x, 2) for x in (4,5)]
Why not simply * ?
[ x * 2 for x in (4,5)]
oops, of course. I had the map function in mind,
which only accepts a function, but this would come
to something like:
li=(4,5)
map(operator.mu l, li, (2,)*len(li))
and is certainly worse then list comprehension :-)
regards,
Karl This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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