This gist provides the learning-python3.ipynb notebook file, which can be viewed and edited in a Jupyter Notebook server to learn Python 3.
Once you load the notebook file to your local jupyter server, you can edit any of the cells, add new cells, or delete cells. The code cells will let you type and execute Python code (since we are using the Python 3 kernel). The markdown cells will let you type notes with a simple syntax.