Tuple comprehensions revisited, in relation to PEP 841 and async iterables

PEP 841 proposes adding new display syntax for frozenset and frozenlist: f{1, 2, 3} for a frozenset f{"a": 1} for a frozendict It also proposes comprehension syntax for both of these immutable collections, supporting both synchronous and asynchronous iterables: f{item for item in items}/f{item async for item in ait} f{k: v for item in items}/f{k: v async for item in ait} If PEP 841 were to be accepted, there would be a pretty striking asymmetry in comprehension syntax for Python’s primitiv...