Question about typing: ints/floats
steven at REMOVE.THIS.cybersource.com.au
Thu Mar 4 03:00:02 CET 2010
On Wed, 03 Mar 2010 15:45:51 -0800, Wells wrote:
>>>> a = 1
>>>> b = 3
>>>> a / b
> This does not implicitly do the casting, it treats 'a' and 'b' as
> integers, and the result as well. Changing 'b' to 3.0 will yield a float
> as a result (0.33333333333333331)
This is design flaw in older versions of Python, that the / operator for
ints performs integer division rather than floating point division.
In Python 2.5 and beyond, you can fix this by calling
from __future__ import division
at the top of your module, and then / will perform float division with
int arguments, and you can use // for integer division.
Or upgrade to Python 3.1, where this is the default behaviour and there
is no need for the from __future__ call.
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