How to use “while” loops in Python. The great thing about Python is that a lot of its statements sound like plain English, meaning you can guess what they do before you even learn!

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 ...