capo-dynamodb-streams: typed, async Python SDK for AWS Dynamodb Streams¶

capo-dynamodb-streams is a typed Python SDK for AWS Dynamodb Streams. It has an async client, AsyncDynamoDBStreamsClient, for asyncio and trio, and a sync client, DynamoDBStreamsClient, 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/dynamodb-streams/

Installation¶

pip install capo-dynamodb-streams

Usage¶

from capo_dynamodb_streams import AsyncDynamoDBStreamsClient


async def main():
    async with AsyncDynamoDBStreamsClient() as dynamo_db_streams:
        # Example: call the describe_stream operation
        response = await dynamo_db_streams.describe_stream()
        print(response["stream_description"])

Error Handling¶

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

from capo_dynamodb_streams import AsyncDynamoDBStreamsClient
from capo_dynamodb_streams.error import InternalServerError


async def main():
    async with AsyncDynamoDBStreamsClient() as dynamo_db_streams:
        try:
            await dynamo_db_streams.describe_stream()
        except InternalServerError 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_dynamodb_streams import AsyncDynamoDBStreamsClient


async def main():
    async with AsyncDynamoDBStreamsClient() as dynamo_db_streams:
        # Default: 3 attempts for every operation
        response = await dynamo_db_streams.describe_stream()

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

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