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by njharman 2327 days ago
> Code written for Python 3.7 might break on older versions of Python

That's a truism. For all versions of Python. If you use feature of python ver X, you should not be surprised that it doesn't run on versions less than X that lack that feature!!!

If you write a Python library and use feature of Python ver X and don't mark library as only >= Python ver X, you are doing it wrong and a horrible person.