postfix await (.await)¶

expr.await awaits expr. as a postfix operator it binds as tightly as attribute access, so it chains left-to-right without parentheses:

async def f():
    g().await.bar().await

transpiles to:

async def f():
    await (await g()).bar()

semantics¶

expr.await is exactly a prefix await expr — same runtime behaviour, same type. the only difference is surface syntax and how it reads in a chain. it is valid only inside an async def, like any other await

precedence¶

because .await binds at the postfix level (alongside .attr, (...), [...]), each .await applies to everything to its left:

g().await.bar().await

reads as "await g(), call .bar() on the result, then await that". the transpiler inserts parentheses only where prefix-await precedence requires them — when the awaited value is the spine of a following attribute, call, or subscript:

completion¶

inside an async def, await is offered after a . alongside the object's real members, so the postfix form is reachable the same way an attribute is

prefix await still works¶

the postfix form is additive — a prefix await expr is left untouched. mix them freely; both lower to the same thing