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

To produce the same numbers as your code:

numbers_sizes = (i*10**exp for exp in range(2, 9) for i in range(1, 10))
for n in numbers_sizes:
    test(n)