> Guido van Rossum came across subtle bugs where the indentation disagreed with the syntactic grouping. Meaningful indentation fixed this class of bug. Since th

> Guido van Rossum came across subtle bugs where the indentation disagreed with the syntactic grouping. Meaningful indentation fixed this class of bug. Since there are no begin/end brackets there cannot be a disagreement between grouping perceived by the parser and the human reader. Significant indentation alone doesn't eliminate this class of bugs. I'm pretty sure I've only seen this once ever, and can't remember the exact combination that caused it, but I have encountered a file that mixed tabs and spaces in a way python didn't barf over, that resulted in visual indentation being different from the programmatic indentation. I can definitely say it was python 2, not 3, so that particular instance may error nowadays.