A Python for loop gotcha When iterating over the elements of an object in a for loop, don’t do anything that would alter the members or length of the sequence.

This post explains how to use loops in Python. You'll learn FOR loops, WHILE loops, BREAK, CONTINUE and more. A crucial skill for coding!

In Python-speak, a codec lets you convert different text encodings. However, you can do other things than text encoding conversion. This is closest in spirit to the C preprocessor method.