Create alias with variable input?

So I've seen a similar question to this, but using fish. I though am using vanilla ubuntu 20 terminal.

What I have is an alias for a directory 1dir='cd such/and/such/and/such', and another for running a python script, where it needs an input of a file which is variable.

pyGraph='python3 -m bruhPy [filename.py]'

1. Thing is - I obviously don't just always run the same filename.py. How do I make sure I can write pyGraph filename.py? Will that work?
2. Can the 2 aliases be combined in one command? Such as 1dir pyGraph filename.py? Or do they have to be executed separately?

1. You'll write alias pyGraph='python3 -m bruhPy. Then pyGraph file.py is expanded to python3 -m bruhBy file.py

2. Aliases are only expanded for the first word of a command. You'll need to write 1dir and pyGraph ... as 2 separate command (with a semicolon or newline separating them)

What you can also do is write a function:

function pyg {
  cd such/and/such/and/such
  python3 -m bruhPy "$1"
}

and call it using pyg <filename>.

I find that I resort to functions whenever my aliases need more power.