mypy-boto3-application-insights

import boto3 import os from typing import TYPE_CHECKING # Ensure boto3 and mypy-boto3-application-insights are installed: # pip install boto3 mypy-boto3-application-insights if TYPE_CHECKING: # These imports are only for type checking and will not be executed at runtime. from mypy_boto3_application_insights import ApplicationInsightsClient from mypy_boto3_application_insights.type_defs import ( ListApplicationsOutputTypeDef, ApplicationTypeDef, ) # Instantiate a boto3 client. # mypy-boto3 provides the type hints for this client. client: "ApplicationInsightsClient" = boto3.client( "application-insights", region_name=os.environ.get("AWS_REGION", "us-east-1"), # The following are placeholder values for demonstration; use actual credentials. aws_access_key_id=os.environ.get("AWS_ACCESS_KEY_ID", "MOCK_KEY"), aws_secret_access_key=os.environ.get("AWS_SECRET_ACCESS_KEY", "MOCK_SECRET"), aws_session_token=os.environ.get("AWS_SESSION_TOKEN", "MOCK_TOKEN") ) print(f"Boto3 client instantiated (runtime type: {type(client)}).") # Example usage with type-checked response and error handling try: # The response variable will be type-hinted as ListApplicationsOutputTypeDef response: "ListApplicationsOutputTypeDef" = client.list_applications() # Access type-hinted data from the response applications: list["ApplicationTypeDef"] = response.get("ApplicationInfoList", []) print(f"Found {len(applications)} Application Insights applications.") if applications: print(f"First application name: {applications[0]['ApplicationName']}") except client.exceptions.ResourceNotFoundException: print("No Application Insights applications found or insufficient permissions.") except Exception as e: print(f"An unexpected error occurred: {e}")