up to 11! (parses on 3.7.2) async def _(): async with await None if not True is False else lambda: _: pass it's a shame that Python has so few exp

up to 11! (parses on 3.7.2) async def _(): async with await None if not True is False else lambda: _: pass it's a shame that Python has so few expression keywords... `yield` can be used as an expression, but it seems to need parentheses :(