Azure Event Grid SDK for Python
Event routing service for building event-driven applications with pub/sub semantics.
Installation
Environment Variables
Authentication & Lifecycle
🔑 Two rules apply to every code sample below:
- Prefer
DefaultAzureCredential. It works locally (Azure CLI / VS Code / Developer CLI) and in Azure (managed identity, workload identity) with no code change. Avoid connection strings, account/API keys — they bypass Entra audit and rotation.
- Local dev:
DefaultAzureCredentialworks as-is.- Production: set
AZURE_TOKEN_CREDENTIALS=prod(orAZURE_TOKEN_CREDENTIALS=<specific_credential>) to constrain the credential chain to production-safe credentials.- Wrap every client in a context manager so HTTP transports, sockets, and token caches are released deterministically:
- Sync:
with <Client>(...) as client:- Async:
async with <Client>(...) as client:andasync with DefaultAzureCredential() as credential:(fromazure.identity.aio)Snippets may abbreviate this setup, but production code should always follow both rules.
Event Types
Publish CloudEvents
Publish EventGridEvents
Event Properties
CloudEvent Properties
EventGridEvent Properties
Async Client
Namespace Topics (Event Grid Namespaces)
For Event Grid Namespaces (pull delivery):
Best Practices
- Pick sync OR async and stay consistent. Do not mix
azure.xxxsync clients withazure.xxx.aioasync clients in the same call path. Choose one mode per module. - Always use context managers for clients and async credentials. Wrap every client in
with Client(...) as client:(sync) orasync with Client(...) as client:(async). For asyncDefaultAzureCredentialfromazure.identity.aio, also useasync with credential:so tokens and transports are cleaned up. - Use
DefaultAzureCredentialfor portable auth across local dev and Azure (avoid connection strings / API keys when possible). - Use CloudEvents for new applications (industry standard)
- Batch events when publishing multiple events
- Include meaningful subjects for filtering
- Use async client for high-throughput scenarios
- Handle retries — Event Grid has built-in retry
- Set appropriate event types for routing and filtering


