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Type annotations are completely optional though. It's possible to write Python that targets 3.5 and 3.8 at the same time.

• pansa2 6y ago
  The core developers made data classes unnecessarily dependent on type annotations, which made me worry that annotations would become less-and-less optional over time. Fortunately, that doesn't seem to be happening. However, the numerous (very long) typing-related PEPs are definitely making the language larger and more complex. Also, any code that uses annotations is more verbose and less like what I want from Python - executable pseudocode.
  • pansa2 6y ago
    > Fortunately [annotations becoming less-and-less optional over time] doesn't seem to be happening. On the other hand, Guido himself recently said "new stdlib code should be written with annotations inline" [0] whereas the core developers original position was "it will be the choice of the author of new stdlib modules whether and how to use type hints" [1], or even "We will not be putting type annotations anywhere in the stdlib" [2]. [0] https://pyfound.blogspot.com/2020/04/the-path-forward-for-typing-python.html https://pyfound.blogspot.com/2020/04/the-path-forward-for-ty... [1] https://mail.python.org/archives/list/python-dev@python.org/message/F54JYUKL3MVIN3MS5NE66DGJSW22XFUU/ https://mail.python.org/archives/list/python-dev@python.org/... [2] https://mail.python.org/archives/list/python-dev@python.org/message/3JXOMQR7KSVZTFWL3QUJMUGBOYB6TETL/ https://mail.python.org/archives/list/python-dev@python.org/...