[Tutor] floating ranges again

[alan.gauld@bt.com]

Sorry I deleted the original thread message but
was playing around with a general purpose floating point 
range function and cxame up with the following. It works 
for ints or floats. You give it an initial value, the 
number of entries you want(which could be the difference 
of upper and lower) and the step value:

>>> def frange(first, number, step):
...     return map(lambda n, f=first, s=step: f+(n*s),
...                range(number))
...
>>> frange(1,10,1)
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> frange(5,5,2)
[5, 7, 9, 11, 13]
>>> frange(3,10,2.5)
[3.0, 5.5, 8.0, 10.5, 13.0, 15.5, 18.0, 20.5, 23.0, 25.5]
>>> frange(5,7,4.5)
[5.0, 9.5, 14.0, 18.5, 23.0, 27.5, 32.0]
>>> frange(2.5,(7.5-2.5),1)
[2.5, 3.5, 4.5, 5.5, 6.5]
>>>

Sorry, could resist playing with that one :-)

Alan G