Error handling and retries

import omophub

client = omophub.OMOPHub(api_key="oh_xxx")

try:
    concept = client.concepts.get(999999999)
except omophub.NotFoundError as e:
    print(f"Not found: {e.message}")
except omophub.AuthenticationError as e:
    print(f"Auth failed: {e.message}")
except omophub.RateLimitError as e:
    print(f"Rate limited. Retry after {e.retry_after}s")
except omophub.ValidationError as e:
    print(f"Invalid request: {e.message}")
except omophub.APIError as e:
    print(f"API error {e.status_code}: {e.message}")

OMOPHubError           # Base exception for all SDK errors
├── APIError           # API returned an error response
│   ├── AuthenticationError  # 401 - Invalid or missing API key
│   ├── NotFoundError        # 404 - Resource not found
│   ├── ValidationError      # 400 - Invalid request parameters
│   ├── RateLimitError       # 429 - Too many requests
│   └── ServerError          # 500+ - Server-side error
└── ConnectionError    # Network connectivity issues

try:
    concept = client.concepts.get(999999999)
except omophub.APIError as e:
    print(e.message)      # Human-readable error message
    print(e.status_code)  # HTTP status code
    print(e.request_id)   # Request ID for debugging

try:
    results = client.search.basic("diabetes")
except omophub.RateLimitError as e:
    print(f"Rate limited. Retry after {e.retry_after} seconds")
    import time
    time.sleep(e.retry_after)
    # Retry the request
    results = client.search.basic("diabetes")

try:
    concept = client.concepts.get(201826)
except omophub.ConnectionError as e:
    print(f"Network error: {e.message}")
    # Implement your retry logic or fallback

try:
    concept = client.concepts.get(concept_id)
except omophub.NotFoundError:
    # Handle missing concept
    concept = None
except omophub.RateLimitError as e:
    # Wait and retry
    time.sleep(e.retry_after)
except omophub.APIError as e:
    # Log and handle other API errors
    logger.error(f"API error: {e.message}")
    raise

async with omophub.AsyncOMOPHub(api_key="oh_xxx") as client:
    try:
        concept = await client.concepts.get(201826)
    except omophub.APIError as e:
        print(f"Error: {e.message}")