Chris (@stoneymonster) and Elecia (@logicalelegance) talk about design patterns, conferences, and Molotov cocktails.
Observer aka subscriber/publisher (caveat)
Delegation and Dependency Injection
Model View Controller (very important if somewhat dated UI pattern)
PyFlakes is a static Python checker
KiCAD Conference is in Chicago on April 26-27, 2019
BangBangConWest 2019 is over but the videos will be up soon including the one Elecia noted about liking things (which was done by Lynn Cyrin).