First, what function should I use for easily executing Python scripts
(during an interactive session)? Currently, I use
subprocess.Popen(['python', 'script.py', 'arg1', 'arg2', 'argn'']), but
it's a bit of a pain to type out a tuple.
Second, is there any way to have positional arguments listed before
optional ones using argparse?

Once I have larger chunks of code, I'll start asking for help on the
Python list (I promise).