macos: env: python: No such file or directory when I use dot slash on a .py file

I thought all I had to do was add things to my path and pythonpath but MAC os still cannot find Python when I do a ./myfile.py etc...

my .zshrc:

export PATH="/Library/Frameworks/Python.framework/Versions/3.8/bin:/opt/homebrew/bin:$PATH"
PYTHONPATH="/Library/Frameworks/Python.framework/Versions/3.8/bin"
export PYTHONPATH

But nothing I can source .zshrc or open a new terminal to be sure and if I say:

./myfile.py

I get the error:

env: python: No such file or directory

Do I have to also alias python to python3???