Should the PEP retain the list of comparable projects? about typing HOT 5 CLOSED

Agreed, will make it a separate informational document and just reference it a single sentence. The reasoning behind this survey is so that the reader knows that we considered those alternatives.

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By the way, this will enable us to take suggestions from the general public on what else should we include, if anything significant is missing.

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The literature review is now in PEP 482: https://www.python.org/dev/peps/pep-0482/

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PyCharm has been providing a way to specify and check types for about four years. The type system suggested by PyCharm grew from simple class types to tuple types, generic types, function types, etc. based on feedback of many users who shared their experience of using type hints in their code. It could be mentioned in the literature review PEP 482.

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Thanks, added (using almost literally what you wrote here :-).

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