{"library":"mypy-boto3-lambda","title":"mypy-boto3-lambda Type Annotations","description":"mypy-boto3-lambda provides type annotations for the AWS Lambda client in `boto3`, generated by `mypy-boto3-builder`. It enhances type checking for `boto3` usage, preventing common runtime errors related to incorrect AWS service calls or response parsing. The library version `1.42.85` corresponds to `boto3` version `1.42.85`. New versions are released frequently, typically mirroring `boto3` releases.","language":"python","status":"active","last_verified":"Wed May 13","install":{"commands":["pip install mypy-boto3-lambda boto3"],"cli":null},"imports":["from mypy_boto3_lambda.client import LambdaClient","from mypy_boto3_lambda.type_defs import ListFunctionsResponseTypeDef"],"auth":{"required":false,"env_vars":[]},"quickstart":{"code":"import boto3\nfrom mypy_boto3_lambda.client import LambdaClient\nfrom mypy_boto3_lambda.type_defs import ListFunctionsResponseTypeDef\n\n# Create a typed Lambda client\n# mypy will automatically use the installed mypy-boto3-lambda stubs for type checking\nlambda_client: LambdaClient = boto3.client(\"lambda\")\n\ntry:\n    # Example: List Lambda functions\n    # The response object will be correctly typed\n    response: ListFunctionsResponseTypeDef = lambda_client.list_functions(MaxItems=1)\n    print(\"Successfully listed Lambda functions (first item): \")\n    for func in response.get(\"Functions\", []):\n        print(f\"- {func['FunctionName']}\")\nexcept Exception as e:\n    # This may happen if AWS credentials are not configured or if the user lacks permissions.\n    print(f\"Error listing Lambda functions: {e}\")\n    print(\"Ensure your AWS credentials are configured (e.g., via AWS CLI or environment variables).\")","lang":"python","description":"This example demonstrates how to create a type-hinted `boto3` Lambda client. `mypy` will automatically pick up the installed stubs when `boto3.client('lambda')` is called, providing autocompletion and type validation. Explicit imports for `LambdaClient` and response `TypeDef` are used for clearer annotations.","tag":null,"tag_description":null,"last_tested":"2026-04-24","results":[{"runtime":"python:3.10-alpine","exit_code":1},{"runtime":"python:3.10-slim","exit_code":1},{"runtime":"python:3.11-alpine","exit_code":1},{"runtime":"python:3.11-slim","exit_code":1},{"runtime":"python:3.12-alpine","exit_code":1},{"runtime":"python:3.12-slim","exit_code":1},{"runtime":"python:3.13-alpine","exit_code":1},{"runtime":"python:3.13-slim","exit_code":1},{"runtime":"python:3.9-alpine","exit_code":1},{"runtime":"python:3.9-slim","exit_code":1}]},"compatibility":{"tag":null,"tag_description":null,"last_tested":"2026-05-13","installed_version":"1.43.0","pypi_latest":"1.43.0","is_stale":false,"summary":{"python_range":"3.10–3.9","success_rate":100,"avg_install_s":3.8,"avg_import_s":0.69,"wheel_type":"wheel"},"results":[{"runtime":"python:3.10-alpine","python_version":"3.10","os_libc":"alpine 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