In the following example, we loop through a list of numbers, and use the variable digit to hold each number in turn: Strings in Python are considered ... range(40): if n==10 and m==10: done ...

If you’ve ever written any Python at all, the chances are you’ve used iterators without even realising it. Writing your own and using them in your programs can provide significant performance ...

The point is that Python has a way to economically express things like loops that iterate over multiple ... the activity for a program tends to be in 10 percent of the code, so optimizing that ...