Python regular expression compilation option questions. a DOTALL question

It's the language/library creator's mind, so no one knows, but if you read Official document original, you can roughly guess.

re.S
re.DOTALL
The special (s special) character . is matched to any character... (throw)

re.X
re.VERBOSE
This flag allows you to separate and annotate the logical parts of the pattern, making regular expressions easier to read and more formal . (Skipping)