send command to Puck.JS from the raspberry without Espruino Hub install

Literally just change the python command variable to:

command = "\x03\x10yourFunctionName();\n"

Apart from the first 2 chars you're just sending JS, so if you want to send arguments it's as easy as "\x03\x10yourFunctionName(1,2,3,'foobar'­);\n"