Zero 3W case and temperatures

I have a new 3D printable case design for the Zero 3W (and maybe Zero 1 & 2?) and am trying to test the cooling capabilities of the incorporated fan and heatsinks. I am new to the Zero 3W and am trying to learn how to control the gpio pins despite the “old info” still on the web referring to dead websites and deprecated routines, imports, commands, etc. So, I am having a hard time navigating the Zeros internals in trying to get info. Can someone help me by showing the way to get internal chip temperatures into a python program. I am trying to upload the .stl files for the case

onto Thingiverse for others to print and test for improvements or suggestions.
See the newly created jeneralab.com site for more info on the case.