I've been trying to modify the default Python compiler/run command in Geany.
Some searching indicated that I would need to modify `/usr/share/geany/filetypes.python's last two lines as follows
#compiler=python -m py_compile "%f"
#run_cmd=python "%f"
compiler=python3 -c "import py_compile; py_compile.compile('%f')"
run_cmd=python3 "%f"
After restarting Geany however, Build -> Set Build Commands
still shows the old commands and attemping to run a py3 script causes errors.