From one of the documents linked to from the page you just read: https://www.python.org/dev/peps/pep-0466/#rejected-alternative-just-advise-developers-to-migrat

From one of the documents linked to from the page you just read: https://www.python.org/dev/peps/pep-0466/#rejected-alternative-just-advise-developers-to-migrate-to-python-3 https://www.python.org/dev/peps/pep-0466/#rejected-alternati...