Map is a common way to transform lists in most programming languages. In Python, map is a function that loops over a list and applies a function (that you provide) to each item. Your function receives ...

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 perfo… ...

If you want to add items to a list in a loop, then you do have to declare an empty list beforehand. Don’t understand me wrong, there are a lot of nice Ideas in Python, but the overall language ...