https://docs.python.org/pt-br/3/reference/lexical_analysis.html#reserved-classes-of-identifiers
https://docs.python.org/pt-br/3/library/doctest.html
https://docs.python.org/pt-br/3.10/library/string.html#format-string-syntax
https://docs.python.org/pt-br/3/library/stdtypes.html#truth
https://docs.python.org/pt-br/3/tutorial/controlflow.html#unpacking-argument-lists
https://docs.python.org/pt-br/3/reference/datamodel.html
https://docs.python.org/pt-br/3/reference/datamodel.html
https://dabeaz.com/per.html
https://mitpress.mit.edu/books/art-metaobject-protocol
https://docs.python.org/pt-br/3/reference/datamodel.html
https://plone.org.br/
