Python block indentation is an example of nested structure that's at least easier to visually scan. You don't need to count opening/closing parens, just look do

Python block indentation is an example of nested structure that's at least easier to visually scan. You don't need to count opening/closing parens, just look down a column of text - assuming nobody mixed tabs and spaces. (but I wouldn't go as far as saying you don't need to scan it)