[$] Python structural pattern matching morphs again

A way to specify multiply branched conditionals in the Python language-akinto the C switch statement-has beena longtime feature request. Over the years, various proposals have beenmooted, but none has ever crossed the finish line and made it into thelanguage. A highly ambitious proposal thatwould solve the multi-branch-conditional problem (and quite a bit more) hasbeen discussed-dissected, perhaps-in the Python community over the last sixmonths or so. We have coveredsome of the discussion in August and September, but the ground has shifted onceagain so it is time to see where things stand.