  /2d	https://docs.python.org/pt-br/3/reference/lexical_analysis.html#reserved-classes-of-identifiers
  /2e	https://docs.python.org/pt-br/3/library/doctest.html
  /2f	https://docs.python.org/pt-br/3.10/library/string.html#format-string-syntax
  /2g	https://docs.python.org/pt-br/3/library/stdtypes.html#truth
  /2h	https://docs.python.org/pt-br/3/tutorial/controlflow.html#unpacking-argument-lists
  /2j	https://docs.python.org/pt-br/3/reference/datamodel.html
  /2j	https://docs.python.org/pt-br/3/reference/datamodel.html
  /2k	https://dabeaz.com/per.html
  /2m	https://mitpress.mit.edu/books/art-metaobject-protocol
  /2j	https://docs.python.org/pt-br/3/reference/datamodel.html
  /2n	https://plone.org.br/
