{"id":3025,"library":"mypy-boto3-appsync","title":"mypy-boto3-appsync Type Annotations","description":"mypy-boto3-appsync provides official type annotations for the `boto3` AppSync client, generated by `mypy-boto3-builder`. It enhances development with static type checking for AWS SDK operations related to AppSync, helping catch errors before runtime. The current version is 1.42.6, and releases are frequent, typically in sync with `boto3` updates and `mypy-boto3-builder` enhancements.","status":"active","version":"1.42.6","language":"en","source_language":"en","source_url":"https://github.com/youtype/mypy_boto3_builder","tags":["boto3","mypy","type-hints","aws","appsync","stubs","type-checking"],"install":[{"cmd":"pip install boto3 mypy-boto3-appsync","lang":"bash","label":"Install boto3 (runtime) and mypy-boto3-appsync (type stubs)"}],"dependencies":[{"reason":"mypy-boto3-appsync provides type stubs for boto3's AppSync client; boto3 itself is required at runtime.","package":"boto3","optional":false}],"imports":[{"note":"boto3 itself does not export type hints directly this way; use the mypy-boto3 stub package.","wrong":"from boto3.client import AppSyncClient","symbol":"AppSyncClient","correct":"from mypy_boto3_appsync.client import AppSyncClient"},{"note":"Type definitions often follow specific casing conventions (e.g., GraphQL -> Graphql).","wrong":"from mypy_boto3_appsync.type_defs import ListGraphQLApisResponseTypeDef","symbol":"ListGraphqlApisResponseTypeDef","correct":"from mypy_boto3_appsync.type_defs import ListGraphqlApisResponseTypeDef"}],"quickstart":{"code":"import boto3\nfrom mypy_boto3_appsync.client import AppSyncClient\nfrom mypy_boto3_appsync.type_defs import ListGraphqlApisResponseTypeDef\n\n# Instantiate the boto3 client with type annotation\nclient: AppSyncClient = boto3.client(\"appsync\")\n\ntry:\n    # Example: List GraphQL APIs (requires appropriate AWS credentials)\n    response: ListGraphqlApisResponseTypeDef = client.list_graphql_apis()\n    print(\"Successfully listed GraphQL APIs:\")\n    for api in response.get(\"graphqlApis\", []):\n        print(f\"  - {api.get('name')} (API ID: {api.get('apiId')})\")\nexcept client.exceptions.UnauthorizedException as e:\n    print(f\"Authentication error: {e}. Make sure your AWS credentials are configured.\")\nexcept Exception as e:\n    print(f\"An error occurred: {e}\")","lang":"python","description":"This quickstart demonstrates how to import and use the `AppSyncClient` type annotation with `boto3`. It shows how to correctly type your `boto3` client instance and use a type definition for a response object, ensuring type safety for your AWS AppSync operations. Remember to have AWS credentials configured for actual execution."},"warnings":[{"fix":"Upgrade your project's Python version to 3.9 or later. Consider using older `mypy-boto3` versions if 3.8 support is critical and you cannot upgrade Python.","message":"Python 3.8 support was removed for all `mypy-boto3` packages. Projects targeting Python 3.8 will need to upgrade to Python 3.9 or newer.","severity":"breaking","affected_versions":">=8.12.0"},{"fix":"Ensure you are using a recent version of `mypy`. In most cases, simply installing the package should make stubs discoverable without special `mypy` configuration. Review `mypy` documentation if issues arise.","message":"`mypy-boto3` packages migrated to PEP 561. While this generally improves compatibility, specific `mypy` configurations (e.g., `MYPYPATH` usage) or older `mypy` versions might need adjustment.","severity":"breaking","affected_versions":">=8.12.0"},{"fix":"Update your code to use the new, shorter TypeDef names. Review your `mypy` errors for specific naming changes in the services you use.","message":"TypeDef names were refactored for brevity and consistency. For example, `CreateDistributionRequestRequestTypeDef` became `CreateDistributionRequestTypeDef`. Conflicting TypeDef names had their `Extra` postfix moved.","severity":"breaking","affected_versions":">=8.9.0"},{"fix":"Always install `boto3` (e.g., `pip install boto3`) alongside your `mypy-boto3-*` packages.","message":"This package only provides type hints for `boto3`. You must install `boto3` itself to have the runtime functionality.","severity":"gotcha","affected_versions":"all"},{"fix":"If you were previously using a single `mypy-boto3` package for all services, migrate to installing individual service stub packages like `mypy-boto3-appsync`.","message":"The `mypy-boto3` ecosystem moved from a monolithic `mypy-boto3` package to granular `boto3-stubs-*` (e.g., `mypy-boto3-appsync`). Legacy `mypy-boto3` is no longer generated with the current builder.","severity":"gotcha","affected_versions":">=8.9.0"},{"fix":"Always verify the correct package name for the specific AWS service you need. Check the `mypy-boto3` builder's documentation or PyPI for the latest package names.","message":"AWS service names can change, leading to updated package names for `mypy-boto3` stubs. For example, `sms-voice` was deprecated in favor of `pinpoint-sms-voice`.","severity":"gotcha","affected_versions":"all"}],"env_vars":null,"last_verified":"2026-04-11T00:00:00.000Z","next_check":"2026-07-10T00:00:00.000Z"}