I’m longing for Python 3 or 5 which at least has an option to make it mandatory to declare variables (I like the Idea of the “strict” keyword in Perl. The turnover from Python V2 to V3 also ...

Any construct which deals with iterators will be prepared for this, like the for loop in our example. When this is run, it correctly stops at the appropriate point. $ python iterator_test.py 463 ...

Loops in Python over NumPy arrays can be optimized automatically this way. But Numba’s optimizations are only automatic up to a point, and may not manifest significant performance improvements ...