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.

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.

However, if the coordinates fall within the 10 pixels of our player, then it’s game over! run is set to False, and the program exits the loop. The final statement following the loop quits the game.