I should have thought of that! Here I looked at the concept of generators,
what they can do, and totally overlooked a user defined range type function
that allows floats. Any reason why range doesn't? Is it for speed, or to
keep the arguments pure (without floating point errors)?
Jacob
There are some cute things we can do with some advanced Python. You don't
have to understand this yet, but here's a variation of your program:
###
def stepper(start, end, step):
... i = start
... while i <= end:
... yield i
... i = i + step
...
from math import pi, cos
for z in stepper(0, 2*pi, pi/6):
... print z, cos(z)
...
0 1.0
0.523598775598 0.866025403784
1.0471975512 0.5
1.57079632679 6.12303176911e-17
2.09439510239 -0.5
2.61799387799 -0.866025403784
3.14159265359 -1.0
3.66519142919 -0.866025403784
4.18879020479 -0.5
4.71238898038 -1.83690953073e-16
5.23598775598 0.5
5.75958653158 0.866025403784
###
stepper() acts like the range() function, but it can work on floating
point numbers. range (and xrange) only work on integers:
http://www.python.org/doc/lib/built-in-funcs.html#l2h-56
If we want to do some stepping across a range with floats, we can use the
stepper() definition above.
Best of wishes to you!
_______________________________________________
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_______________________________________________
Tutor maillist - Tutor@python.org
http://mail.python.org/mailman/listinfo/tutor
