{"id":3701,"library":"mypy-boto3-signin","title":"mypy-boto3-signin Type Annotations","description":"mypy-boto3-signin provides static type annotations for the `boto3` AWS SDK's SignInService. It is generated by `mypy-boto3-builder` and aims to enhance developer experience by enabling IDE auto-completion, catching type-related errors at development time, and improving code readability for `boto3` client interactions with the SignInService. Releases are frequent, typically aligning with new `boto3` versions or `mypy-boto3-builder` updates.","status":"active","version":"1.42.3","language":"en","source_language":"en","source_url":"https://github.com/youtype/mypy_boto3_builder","tags":["aws","boto3","mypy","type-hinting","stubs","cloud","signin"],"install":[{"cmd":"pip install mypy-boto3-signin boto3","lang":"bash","label":"Install with boto3"}],"dependencies":[{"reason":"Runtime dependency for which these type stubs are provided.","package":"boto3"},{"reason":"Requires Python 3.9 or newer, as dropped support for Python 3.8 in mypy-boto3-builder 8.12.0.","package":"python","optional":false}],"imports":[{"note":"For type-hinting the boto3 'signin' client.","symbol":"SignInServiceClient","correct":"from mypy_boto3_signin.client import SignInServiceClient"},{"note":"For type-hinting the response of 'create_account_subscription' operation.","symbol":"CreateAccountSubscriptionOutputTypeDef","correct":"from mypy_boto3_signin.type_defs import CreateAccountSubscriptionOutputTypeDef"}],"quickstart":{"code":"import boto3\nfrom typing import TYPE_CHECKING\n\nif TYPE_CHECKING:\n    from mypy_boto3_signin.client import SignInServiceClient\n    from mypy_boto3_signin.type_defs import CreateAccountSubscriptionOutputTypeDef\n\ndef create_signin_subscription() -> CreateAccountSubscriptionOutputTypeDef:\n    # A real 'signin' service operation might be different or require more parameters.\n    # This is a hypothetical example for demonstration purposes.\n    client: SignInServiceClient = boto3.client(\"signin\")\n    response = client.create_account_subscription(\n        # Actual parameters would go here, e.g., 'SourceId': 'some-id'\n    )\n    print(f\"Subscription created: {response}\")\n    return response\n\nif __name__ == \"__main__\":\n    # This code is illustrative. Actual 'signin' service interaction \n    # will depend on its capabilities and available operations.\n    try:\n        result = create_signin_subscription()\n        print(f\"Result type: {type(result)}\")\n    except Exception as e:\n        print(f\"Error interacting with SignInService: {e}\")\n","lang":"python","description":"This quickstart demonstrates how to type-hint a `boto3` 'signin' client and its response using `mypy-boto3-signin` stubs. It showcases the use of `SignInServiceClient` for the client object and `CreateAccountSubscriptionOutputTypeDef` for a hypothetical operation's return type, improving static analysis and IDE support."},"warnings":[{"fix":"Upgrade Python environment to 3.9 or a newer supported version.","message":"Support for Python 3.8 was removed in `mypy-boto3-builder` version 8.12.0, which generates `mypy-boto3-signin`. Projects using older Python versions must update to Python 3.9 or newer.","severity":"breaking","affected_versions":">=8.12.0 of mypy-boto3-builder and generated stubs"},{"fix":"Update `TypeDef` imports and usage to reflect the new, shorter naming conventions.","message":"In `mypy-boto3-builder` 8.9.0, there were breaking changes to `TypeDef` naming conventions, e.g., `CreateDistributionRequestRequestTypeDef` became `CreateDistributionRequestTypeDef`. While specific to service names, this applies generally across the `mypy-boto3` ecosystem and could affect custom stub usage.","severity":"breaking","affected_versions":">=8.9.0 of mypy-boto3-builder and generated stubs"},{"fix":"Ensure `pip install boto3` is executed in your environment alongside `mypy-boto3-signin`.","message":"This package provides *only* type stubs. The actual `boto3` library must be installed separately for the code to run at runtime.","severity":"gotcha","affected_versions":"All"},{"fix":"Ensure `mypy` and packaging tools (like `setuptools`, `pip`) are up-to-date. In some cases, explicit `pip install --upgrade mypy setuptools` might be needed.","message":"The `mypy-boto3` ecosystem migrated to PEP 561-compliant packages. While beneficial, this might cause issues with very old `mypy` or `setuptools` configurations.","severity":"gotcha","affected_versions":">=8.12.0 of mypy-boto3-builder and generated stubs"},{"fix":"Add explicit type annotations to `boto3` client and resource assignments if auto-completion or type checking is not working as expected in your IDE.","message":"Explicit type annotations (e.g., `client: SignInServiceClient = boto3.client(...)`) may be necessary for full IDE auto-completion in some environments (e.g., VSCode with certain extensions), even though `mypy` and PyCharm often infer types automatically.","severity":"gotcha","affected_versions":"All"}],"env_vars":null,"last_verified":"2026-04-11T00:00:00.000Z","next_check":"2026-07-10T00:00:00.000Z"}