I leant Python on a Nokia N900, which ran a regular Linux with Xorg, ssh, etc. You can still do this today with a Linux phone (e.g.: postmarketOS). Of course,

I leant Python on a Nokia N900, which ran a regular Linux with Xorg, ssh, etc. You can still do this today with a Linux phone (e.g.: postmarketOS). Of course, a lot of your typical iOS apps won't run there (e.g.: Signal, Maps, etc), but you can't really run docker container on iOS (yet?). If you really need all the usual iOS (or Android) apps maybe you just need two phones? Still lighter than a phone and a laptop.