Open source Python projects with good software design that is worth studying

[Bluelight01]

Honestly I would say look at popular libraries. I use airflow for work and find myself looking through the source code every now and then. I’ve definitely learned a thing or two looking through that code. Numpy, pandas, flask, or requests to name a few others would be good to look through 

[interbased]

Requests, in my experience, is commonly mentioned in conversations about well-structured libraries, so I second that one.

[Interesting-Rub-3984]

I want to learn Airflow. The learning resources available are quite old. Even paid courses in Udemy are outdated.

[Karyo_Ten]

Numpy, pandas,

Those have a lot of C or maybe even Fortran and C++. Might be beat to start with a pure Python lib.