Easy to program in. No need to recompile, you can hack in as you would in shell. Fun.
Lets see if I can predict the weather. Oh yes, lets hack something in python. Hey, it works. But it is slow on a PC and so slow on a phone that future is already past when you predict is.
Then you try to improve the speed. That's very very bad idea. You can't optimize Python, but you can spend hours trying. You make a mental note to never ever use Python for computation again.
But Python should be fine for simple Gtk project, communicating over Dbus, right?
For bigger projects, Python has some support. Modules / object orientation really helps there. Lack of compilation really hurts there, but this is fun language, right? Allowing you to write nice and clean code.
Refactoring is hard, because variables are not declared.
Python is a nice... trap
But then your project grows larger, and you realize it takes 30 seconds to start up. Because many module need gtk, and importing gtk takes time. Heck... compiling _and_ running C based hello world is still faster then running Python based one.
Ok, C++ was tempting. Gtk Hello world takes 55 seconds to compile. My g++ does not support "auto", so the application starts with Glib::RefPtr<Gtk::Application> app = Gtk::Application::create(argc, argv, "org.gtkmm.example"). I think I'll stick with C.
Oh, and I already used my main SIM in N900/Debian... and I really used N900/Debian. I needed to tether a network, but not provide wifi hotspot. Done.