[Tutor] range() fractional increment

[John Fouhy]

2009/3/31 james carnell <jimcarnell at yahoo.com>:
> for row in range(25,31,1):
>     for col in range(10,12, 0.3):  #<- Crash Bang doesn't work 0.3 = zero =
> infinite loop?
> [...]
> is there no way to do it with a range function (and have it still look like
> you're not on crack)?

Well, you could do this:

>>> [float(x)/3 for x in range(30, 37)]
[10.0, 10.333333333333334, 10.666666666666666, 11.0,
11.333333333333334, 11.666666666666666, 12.0]

Or even:

>>> [math.floor(10*float(x)/3)/10 for x in range(30, 37)]
[10.0, 10.300000000000001, 10.6, 11.0, 11.300000000000001, 11.6, 12.0]

However, the builtin range() only works with integers.  I think there
is a range() function in the python cookbook that will do fractional
step sizes.

But really, there's nothing wrong with your while loop.

-- 
John.