I personally dislike with a passion every language or grammar that depends on white-space identation, especially if the designers were extremely opinioned to the degree that you can only use spaces (or even, a specific number of spaces per identation level) and not tabs.
It's not as a big of a deal in Python because as others have mentioned, you usually don't end up writing large functions to begin with, and tab identation is supported. It still means that if you try to send a code snippet to someone over email or Slack, IM, etc it may not work because whitepsace may be trimmed etc. With YAML, it's way worse for reasons the author outlined.
Something may look good on paper (or in screenshots) but practical considerations need to factored in when designing a grammar, and there are myriads pretty-formatting utilities that could be used to that end if one cares for that sort of thing (see also: clang-format).
It's not as a big of a deal in Python because as others have mentioned, you usually don't end up writing large functions to begin with, and tab identation is supported. It still means that if you try to send a code snippet to someone over email or Slack, IM, etc it may not work because whitepsace may be trimmed etc. With YAML, it's way worse for reasons the author outlined.
Something may look good on paper (or in screenshots) but practical considerations need to factored in when designing a grammar, and there are myriads pretty-formatting utilities that could be used to that end if one cares for that sort of thing (see also: clang-format).