what does the colon mean??

Question

what does the colon(:) mean in python?

Answer 1

Its used for many things... defining functions, classes, loop, branches (ifs) and collection slicing. I probably missed out a few.

Answer 2

The colon tells the computer to expect whitespace on the next n lines where n is the number of lines to be indented. Since python uses whitespace instead of curly brackets, whitespace is used.