Generally virtualenv does not use any python packages aleady present in the global site packages, but what if you want to use them?
Want to know how to show the preview of a link to your webpage on slack?
Would you like your program to do something when the user hits
Ctrl + C a.k.a SIGINT?
It is often required to know whether a map has a key in it so that we don’t crash our app trying to access a key that does not exist. So how do we do it in golang?