Doesn't run?

[BallSaxbury]

python cubes.py 3
File "", line 1
python cubes.py 3
^^^^^
SyntaxError: invalid syntax

[VladimirFokow]

you should run the python cubes.py 3 command in the shell, not in python interpreter.

https://realpython.com/run-python-scripts/#using-the-python-command