how to contribute

[mkinney]

How can I contribute?

For instance, I would like to add this to the networking page (number of addresses in subnet):

def number_addresses_from_cidr(cidr):
    n = 0
    if cidr > 0 and cidr < 33:
        n = 2**(32 - cidr)
    return n

I don't see any unit tests. It might look something like this:

def test_number_of_addresses_from_cidr():
    assert number_addresses_from_cidr(1) == 2147483648 # 2^31
    assert number_addresses_from_cidr(2) == 1073741824 # 2^30
    assert number_addresses_from_cidr(29) == 8 # 2^3
    assert number_addresses_from_cidr(30) == 4 # 2^2
    assert number_addresses_from_cidr(31) == 2 # 2^1
    assert number_addresses_from_cidr(32) == 1 # 2^0