mypy-boto3-secretsmanager Type Stubs

Common errors

• ModuleNotFoundError: No module named 'mypy_boto3_secretsmanager'

  cause The `mypy-boto3-secretsmanager` package, or the umbrella `boto3-stubs` package, has not been installed in your Python environment.
  fix Install the package using pip: `python -m pip install mypy-boto3-secretsmanager` or `python -m pip install 'boto3-stubs[secretsmanager]'`

• error: Library stubs not installed for "boto3" (or incompatible with your Python version) / error: Skipping analyzing "boto3": module is installed, but missing library stubs or py.typed marker

  cause Mypy cannot find or properly utilize the type stubs for the underlying `boto3` library, even if `mypy-boto3-secretsmanager` is installed. This can happen due to an incomplete installation, mismatched versions between `boto3` and its stubs, or mypy not being run in the correct environment.
  fix Ensure `boto3-stubs` (or the service-specific stub) is correctly installed for your `boto3` version: `python -m pip install 'boto3-stubs[secretsmanager]' --upgrade`. Also, confirm mypy is running in the same Python environment where stubs are installed.

• error: "SecretsManagerClient" has no attribute "some_method"; maybe "another_method"?

  cause This type-checking error typically occurs when the `mypy-boto3-secretsmanager` stubs' version does not align with your installed `boto3` version, or you are trying to use a method that does not exist in the Secrets Manager client for that `boto3` version.
  fix Ensure that your `mypy-boto3-secretsmanager` (or `boto3-stubs`) package version is compatible with your `boto3` version. It's often recommended to install `boto3-stubs` with a version constraint matching your `boto3` installation, e.g., `python -m pip install 'boto3-stubs[secretsmanager]==X.Y.Z'` where `X.Y.Z` is your `boto3` version.

• error: Name "mypy_boto3_secretsmanager.type_defs.SecretValueEntryTypeDef" is not defined

  cause The specific `TypeDef` or other type definition is being imported incorrectly, or it may not exist with that exact name in the installed version of `mypy-boto3-secretsmanager`. This often happens due to renaming in newer versions of the builder or incorrect module path.
  fix Verify the correct import path and name for the `TypeDef` in the `mypy-boto3-secretsmanager` documentation for your installed version. Type definitions are typically found in `mypy_boto3_secretsmanager.type_defs`. For example, `from mypy_boto3_secretsmanager.type_defs import APIErrorTypeTypeDef`.

Warnings

• breaking As of `mypy-boto3-builder` version 8.12.0 (which generates these stubs), Python 3.8 is no longer supported. Packages built with this builder (including `mypy-boto3-secretsmanager` 1.x.x versions) require Python 3.9 or newer.
  Fix: Upgrade your Python environment to 3.9 or higher.
• gotcha Type stubs are designed to match specific `boto3` and `botocore` versions. Mismatched versions between `boto3` (or `botocore`) and `mypy-boto3-secretsmanager` can lead to inaccurate type hints or Mypy errors. Always try to keep them aligned.
  Fix: Install `mypy-boto3-secretsmanager` and `boto3` with compatible versions. Often, installing both at the same time will resolve compatibility by pulling the latest matching `mypy-boto3` stubs.
• breaking For stubs generated by `mypy-boto3-builder` version 8.9.0 and later, some `TypeDef` names for method arguments and responses might have changed, primarily to shorten names or resolve conflicts (e.g., `CreateDistributionRequestRequestTypeDef` -> `CreateDistributionRequestTypeDef`).
  Fix: Consult the specific service's documentation or use IDE autocompletion to find the correct `TypeDef` names after upgrading. Often, removing redundant `Request` or `Extra` suffixes might be the solution.
• deprecated The monolithic `mypy-boto3` package (which included all service stubs) is now considered a legacy product. While it still exists, the recommended approach for modern `mypy-boto3-builder` versions is to install specific service packages like `mypy-boto3-secretsmanager` to reduce dependencies and improve build times.
  Fix: Prefer installing individual service packages (e.g., `pip install mypy-boto3-secretsmanager`) over the single, large `mypy-boto3` package.
• gotcha `boto3` clients require an AWS region to be specified for successful operation. This can be done explicitly in the `boto3.client()` call, via environment variables (e.g., `AWS_REGION` or `AWS_DEFAULT_REGION`), or through AWS configuration files. Failure to specify a region results in a `botocore.exceptions.NoRegionError`.
  Fix: Ensure an AWS region is configured for `boto3`. Set the `AWS_REGION` or `AWS_DEFAULT_REGION` environment variable, or pass `region_name='your-region'` directly to the `boto3.client()` call, or configure it in your AWS CLI configuration files.
• gotcha The `boto3` client failed to initialize because no AWS region was specified. Boto3 requires a region to be set, either explicitly in the client call, via environment variables (`AWS_REGION` or `AWS_DEFAULT_REGION`), or in AWS configuration files (`~/.aws/config`).
  Fix: Ensure an AWS region is configured for your Boto3 client. This can be done by setting the `AWS_REGION` environment variable, configuring your AWS CLI, or passing the `region_name` argument directly to `boto3.client('secretsmanager', region_name='your-region')`.

Install

• pip install mypy-boto3-secretsmanager boto3 Install with boto3

Imports

• SecretsManagerClient

  from mypy_boto3_secretsmanager import SecretsManagerClient

• GetSecretValueResponseTypeDef
  wrong:

  from mypy_boto3_secretsmanager import GetSecretValueResponse

  correct:

  from mypy_boto3_secretsmanager.type_defs import GetSecretValueResponseTypeDef

  Type definitions are typically in the `type_defs` submodule and follow a `*TypeDef` naming convention, not direct imports from the top-level package or `*Response`.

Quickstart

This example demonstrates how to use the type stubs for AWS Secrets Manager. It initializes a `SecretsManagerClient` and calls `get_secret_value`, with full type hinting for the client and the response dictionary. This allows static type checkers like Mypy to validate your code and provides rich autocompletion in IDEs.

import boto3
import os

from mypy_boto3_secretsmanager import SecretsManagerClient
from mypy_boto3_secretsmanager.type_defs import GetSecretValueResponseTypeDef


def get_secret_value_typed(secret_id: str) -> str:
    client: SecretsManagerClient = boto3.client("secretsmanager")
    try:
        response: GetSecretValueResponseTypeDef = client.get_secret_value(SecretId=secret_id)
        secret_string = response.get("SecretString")
        if secret_string is None:
            raise ValueError(f"Secret '{secret_id}' has no SecretString.")
        return secret_string
    except client.exceptions.ResourceNotFoundException:
        print(f"Secret '{secret_id}' not found.")
        return ""
    except Exception as e:
        print(f"Error retrieving secret '{secret_id}': {e}")
        return ""


if __name__ == "__main__":
    # Replace with a real secret ID or use an environment variable
    # Ensure AWS credentials are configured (e.g., via AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_REGION env vars or ~/.aws/credentials)
    test_secret_id = os.environ.get('TEST_SECRET_ID', 'my-test-secret-id-nonexistent')
    print(f"Attempting to retrieve secret: {test_secret_id}")
    secret = get_secret_value_typed(test_secret_id)
    if secret:
        print(f"Retrieved secret (first 10 chars): {secret[:10]}...")
    else:
        print("Secret retrieval failed or secret not found.")