However, even if I assume the mythical future PEP never happens, in terms of readability, a WORD is vastly less confusing than a combination of punctuation that has no obvious or natural interpretation like '=>'.  Or rather, I think that spelling is kinda-sorta obvious for the lambda meaning, and the use you want is kinda-sorta similar to a lambda.  So I *do* understand how you get there... but it still seems like much too much line noise for a very minimal need.