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Add support for async/await in the lambda expression. #101871

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@muazhari

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@muazhari
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Feature or enhancement

Need support for async/await in the lambda expression.

Pitch

I found meaningful use cases for async lambda in reactive programming. Here is the example code that should be:

async def read_one_by_id(request: ReadOneByIdRequest) -> Content[Account]:
    return rx.just(request).pipe(
        ops.map(async lambda request: await account_repository.read_one_by_id(request.id)),
        ops.map(lambda entity: Content(data=entity, message="Account read one by id succeed.")),
        ops.catch(lambda exception, source: rx.just(
            Content(entity=None, message=f"Account read one by id failed: {exception}")))
    ).run()

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#77628

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