How to generate exponentially increasing range in Python

Question

I want to test the performance of some code using an exponentially increasing value. So that as an extra digit is added to the numbers_size the increment is multiplied by 1

Answer 1

example of 'NOT reading the question properly' and 'NOT how to do it'

for i in xrange(100, 1000000000, 100):
    # timer
    test(i)
    # whatever

Is about as simple as it gets... adjust xrange accordingly