These tutorials are followed along with the tutorials on learnpython.org These tutorials are not original and are meant to serve as showing a working knowledge of python fundamentals.
Each tutorial gives an introduction to the topics introduced in the file name, for further detail and expansion on these topics, one could consult other free tutorials as well.
A good example for further knowledge is https://jakevdp.github.io/PythonDataScienceHandbook/ This is a jupyter notebook that gives more in depth material into each topic covered as well as additional topics within Python programming and data science applications.