This is a python script which I'm going to create a markdown file that appends 'Post Front-matter' so that I won't spend more time on this.

This is a script you can execute in command line anywhere you are in, you just need to set the shebang

#!/usr/bin/env python3

to tell the interpreter to execute the python file.

And then you copy the makepost.py to the directory /usr/local/bin to ensure the global accessable:

sudo cp makepost.py /usr/local/bin
sudo chmod +x /usr/local/bin/makepost

And now you can execute the command like this:

makepost post <--path optional>

Also you are supposed to set the _post directory as your own default post directory.