fromkeys « Dictionary « Python Tutorial

8.9.1.fromkeys method creates a new dictionary with the given keys, each with a default corresponding value of None
8.9.2.If you don't want to use None as the default value, you can supply your own default
8.9.3.get method is a way of accessing dictionary items.
8.9.4.You may supply your own "default" value
8.9.5.Create dictionary from fromkeys() function