Hi Blaine, A similar idea has been discussed at the typing tracker, see https://github.com/python/typing/issues/239, but finally we went with the current syntax. It has several advantages such as: * It does not require a new syntax, i.e. can be backported to older Python versions * Possibility to define generic aliases without too much metaclass magic * Easier to search and ask questions on stackoverflow etc.
In general, there is quite high bar to modify Python syntax, so that if there other options are available they will be preferred. -- Ivan
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