How to set class attribute with await in __init__

Question

How can I define a class with await in the constructor or class body?

For example what I want:

im         


        

Answer 1

[Almost] canonical answer by @ojii

@dataclass
class Foo:
    settings: Settings
    pool: Pool

    @classmethod
    async def create(cls, settings: Settings, dsn):
        return cls(settings, await create_pool(dsn))