# Converting a netmask to CIDR with vanilla python

On a quick note:
I wasn’t able to find a simple solution to convert a classicly formated netmask to a CIDR format in python. So I wrote this line:
sum([ bin(int(bits)).count("1") for bits in m_netmask.split(".") ]) Place into a function:
def netmask_to_cidr(m_netmask): return(sum([ bin(int(bits)).count("1") for bits in m_netmask.split(".") ])) It takes a netmask as a string (for example 255.255.255.0) and will convert it into a binary representation, then it will count the ones in it.