I need to test sub-domains on my localhost. How can I effectively have this result of adding *.localhost.com to my /etc/hosts/ file?

Since it is not possible to simply put wildcards into hosts file, either manually adding the subdomains or making use of a light dns server like dnsmasq is required.

Possibly the best overall introduction and reference I have seen for modern python tooling.

Goes a little into the details but expects you to generally look for additional information on your own if you're stuck.
Amazing, in-depth, concise.

Linux kernel module for Belkin B2B128 USB 3.0 Hub + Gigabit Ethernet Adapter. It is the modified driver for the AX88179_178A

In-depth explanation and introduction of the requests standard library.

Galaxy S4 - a collection of guides to set up custom roms etc. and accompanying resources, from roms through flashing tools and recovery images everything necessary should be here.

And another, more template-y version of 'modern' python development tooling.