I'm working on an embedded device already customized. Here some details:
# uname -a Linux DX-4400 3.10.31-ltsi-05172-g28bac3e-dirty #12 SMP Tue Jan 23 17:14:13 EST 2018 armv7l GNU/Linux
I have root access, rw /, Internet connection, but neither a package manager nor build essentials. I would avoid - if possible - to prepare a cross-build environment.
I wonder if with this information (or with others I can retrieve) there's a way to install Python's binaries to the system - or even a package manager.