Requirements

Python 3
Requests, elegant and simple HTTP library for Python. To ensure Requests is installed in your computer, simply run this simple command in your terminal of choice:

python3 -m pip install requests

Beautiful Soup 4, Python library for pulling data out of HTML and XML files. Install it with this command in your terminal of choice:

python3 -m pip install beautifulsoup4

Browser Cookie 3, Python package used to L\loads cookies used by your web browser into a cookiejar object. Required since Cardmarket is now protected by Cloudflare.

python3 -m pip install browser-cookie3

Optional (needed for the User Interface script)

tkinter, GUI framework for Python. Only needed if you want to use the GUI script (cw-wizard-gui.py).
For Mac OS users:

brew install python-tk

sudo apt-get install python3-tk

For Windows users, first check if the script work, if not then:
You need to re-start (maybe re-download) the Python3 installer and check ☑️ the Optional Features named tcl/tk and IDLE.