First, I have to make a personal confession — I never liked the SMS short-hand thingy that worked with pre-iPhone phones. That was one of the reason I seldom use SMS/Text-Messages unless I really need to. I have been using text-expansion since the early days of TextExpander[1], an app that works on iOS and macOS. However good the iPhone keyboard was, it was always not convenient to type and retype details such as hom…
In general "." is a delimiter, EXCEPT for "py" so that it doesn't interfere with me typing python files