External Issue: datetime.strptime() should support %f

16922, “leekillough”, “datetime.strptime() should support %f”, “2021-01-08T22:48:46Z”

Similar to #16834, datetime.strptime() should support %f.

It is much harder to implement than strftime(), since it needs to parse strings with the %f specifier at an arbitrary location in the format.