Finding multiple of a decimal number in a floating point list

[Alejandro]

Hi:

I need to find the multiples of a decimal number in a floating point
list. For instance, if a have the list [0,0.01,0.02,...1], I want the
multiples of 0.2: [0, 0.2,0.4,0.6,0.8,1].

With integers this problem is easy, just test for (i%n == 0), where i
is the number I am testing, and n is the multiple. Given the finite
resolution of floating point numbers, this is more complicated for
float.

I came with this solution:

from numpy import arange
from math import modf, fabs

float_range = arange(0, 1, 0.01)
for f in float_range:
    m = modf(f / 0.2)[0]
    if m<1e-13 or fabs(1-m)<1e-13:
        print f
        # Do something else

This code works, however, I found it a little ugly. Is there a better
way to do the same?

Alejandro.