Python's use of whitespace is, dare i say, perfect.

It makes everything more readable. I've never seen cases where indentation is ambiguous.

I think this is because in a programming language indentation happens in a small set of specific situations like `for` loops and such. Either you indent right or you get an error. On the rare occasion the wrong indentation level can assign a variable to the wrong value, but that is a rookie mistake.

Whereas in YAML, everything starts out ambiguous. Everything is context sensitive. Indents change the meanings of things in slight, unclear ways. Its a constant source of confusion