openfeature-sdk

from openfeature import api, EvaluationContext from openfeature.provider.in_memory_provider import InMemoryFlag, InMemoryProvider import os # Configure a simple in-memory provider for demonstration # In a real application, you would typically use an external provider (e.g., Flagd, LaunchDarkly) my_flags = { "new-feature-enabled": InMemoryFlag("on", {"on": True, "off": False}), "welcome-message": InMemoryFlag("greeting", {"greeting": "Hello, OpenFeature!", "default": "Welcome!"}) } api.set_provider(InMemoryProvider(my_flags)) # Create a client, optionally with a domain client = api.get_client() # Define an evaluation context for targeting user_id = os.environ.get('USER_ID', 'default_user') eval_context = EvaluationContext(targeting_key=user_id, attributes={"region": "us-east-1"}) # Evaluate a boolean flag is_new_feature_enabled = client.get_boolean_value("new-feature-enabled", False, eval_context) if is_new_feature_enabled: print(f"New feature is enabled for user {user_id}!") else: print(f"New feature is disabled for user {user_id}.") # Evaluate a string flag message = client.get_string_value("welcome-message", "Fallback Message", eval_context) print(f"Retrieved message: {message}") # It's good practice to shut down providers gracefully api.shutdown()