capo-amplifybackend: typed, async Python SDK for AWS Amplifybackend¶

capo-amplifybackend is a typed Python SDK for AWS Amplifybackend. It has an async client, AsyncAmplifyBackendClient, for asyncio and trio, and a sync client, AmplifyBackendClient, with the same methods. Requests and responses are typed with TypedDicts, so your editor and type checker know every field.

It is part of capo, a community-driven alternative to boto3 and aioboto3, built on its own HTTP stack instead of botocore and generated from the official AWS Smithy models. Documentation: https://capo-sdk.dev/services/amplifybackend/

Installation¶

pip install capo-amplifybackend

Usage¶

from capo_amplifybackend import AsyncAmplifyBackendClient


async def main():
    async with AsyncAmplifyBackendClient() as amplify_backend:
        # Example: call the clone_backend operation
        response = await amplify_backend.clone_backend()
        print(response["app_id"])

Error Handling¶

The SDK raises exceptions for errors returned by the API. Catch them to handle failures gracefully.

from capo_amplifybackend import AsyncAmplifyBackendClient
from capo_amplifybackend.error import BadRequestException


async def main():
    async with AsyncAmplifyBackendClient() as amplify_backend:
        try:
            await amplify_backend.clone_backend()
        except BadRequestException as e:
            print(f"Error: {e}")
            print(e.data)  # additional error data

Retrying¶

The SDK retries failed operations automatically. Retry behaviour follows the Smithy specification: errors are retried based on their is_retryable and is_throttling_error attributes. Throttling errors use a longer base delay. Network-level failures (connection errors and timeouts) are also retried. Non-retryable errors, such as client errors without the @retryable trait, are raised immediately without further attempts.

The number of attempts defaults to 3 and can be changed at the client level via retry_max_attempts, or per call via config_overrides.

from capo_amplifybackend import AsyncAmplifyBackendClient


async def main():
    async with AsyncAmplifyBackendClient() as amplify_backend:
        # Default: 3 attempts for every operation
        response = await amplify_backend.clone_backend()

        # Override per operation
        response = await amplify_backend.clone_backend(config_overrides={"retry_max_attempts": 5})

        # Disable retries for this call
        response = await amplify_backend.clone_backend(config_overrides={"retry_max_attempts": 1})