Python 3.3 standard library 'ipaddress' suffers from a critical IP address vulnerability (CVE-2021-29921) identical to the flaw that was reported in the "netmask" library earlier this year.

I'm currently converting a whole lot of IP address data from some quite ghastly flat files.<BR>Ghastliness aside, I'm trying to sort out a way to check each IP listed to check if it's a subnet ...

Python for VS Code comes with the Python extension in the code editor's marketplace, which has been installed a whopping 30.3 million times, making it the most popular tool in the marketplace by far.