try:
    agent = client.agents.create(name="Test Agent")
except julep.APIError as e:
    print(f"API Error: {e.status_code} - {e.message}")

try:
    client = julep.Client(api_key="invalid_key")
except julep.AuthenticationError as e:
    print(f"Auth failed: {e}")

try:
    results = client.agents.list()
except julep.RateLimitError as e:
    print(f"Rate limited. Retry after: {e.retry_after} seconds")

from julep.utils import retry_with_backoff

@retry_with_backoff(max_retries=3)
def create_agent_with_retry():
    return client.agents.create(name="Test Agent")

def get_agent_safely(agent_id):
    try:
        return client.agents.get(agent_id)
    except julep.NotFoundError:
        return create_default_agent()
    except julep.APIError:
        return use_cached_agent(agent_id)