i need a module for more involved command line parsing

[snippsat]

now i really need to understand decorators and what they do.

Not really,there is no problem teaching someone Click that don't know what a decorator is.
It's make the interface a lot cleaner eg using @click.command() than have all code make it up in the interface.

It' really the same for most libraries with or without decorator requests.get('https://python-forum.io/').
I do not all need to see the eg 50 lines of code of requests.get() to use it.

A decorator is easy in it's core.

def make_bold(fn):
    '''Do not need to see me'''
    def new_func():
        return f"<b>{fn()}</b>"
    return new_func

User only need to add @make_bold,the name give a hint what it dos or make documentation for it.

@make_bold
def foo():
    return 'python-forum'

print(foo())

Output:
<b>python-forum</b>