$ python iterator_test.py 463 926 1389 1852 Let’s take a look at what’s going on. We made our own class and defined a __next__ method, which returns a new iteration every time it’s called.

This post explains how to use loops in Python. You'll learn FOR loops, WHILE loops, BREAK, ... Finally, we can actually change the iterator – the number of steps taken on each loop.

In general, for loops are used when you know exactly how many times you plan to run a loop; a while loop is used when the number of iterations is uncertain. Conditional Statement Basic Structure: if ...

How to Read Multiple Files in a Loop in Python. ... Create a variable to store the file contents. This variable will store the text of the file for each iteration.