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Python Python Basics (2015) Logic in Python Around and Around

Posted by Davide Fazio
Davide Fazio
952 Points

While loop example

start = 99 while start: print("{} bottles of milk on the wall, {} bottles of milk.".format(start)) print("Take one down and pour it on some cereal.") start -= 1 print("{} bottles of milk on the wall.".format(start))

The above example is copied and pasted from the Teachers notes. I've tried to run/type this on my own unsuccessfully in the workspace environment and a python visualizer. Both return an error message "tuple index out of range". Please advise. Thank you!

1 Answer

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

:point_right: There appears to be a bug in the example!

One of the lines of the example looks like this:

    print("{} bottles of milk on the wall, {} bottles of milk.".format(start))

It has a string with two placeholders, but it attempts to format it using only one argument. Try changing it to this:

    print("{} bottles of milk on the wall, {} bottles of milk.".format(start, start))

You may want to report this as a bug :beetle: using the Support page.