Pataxe / a10_python

http://interactivepython.org/runestone/static/pythonds/Graphs/Implementation.html

https://vevurka.github.io/dsp17/python/graphs_in_python/

https://www.programiz.com/python-programming/methods/built-in/iter

https://www.python.org/doc/essays/graphs/

http://www.bogotobogo.com/python/python_graph_data_structures.php

https://www.python.org/doc/essays/graphs/

http://interactivepython.org/runestone/static/pythonds/BasicDS/ImplementinganUnorderedListLinkedLists.html