azure-eventgrid-py
Azure Event Grid SDK for Python. Use for publishing events, handling CloudEvents, and event-driven architectures. Triggers: "event grid", "EventGridPublisherClient", "CloudEvent", "EventGridEvent", "publish events".
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ソースの指示 · 読み取り専用プレビュー- name
- azure-eventgrid-py
- description
- Azure Event Grid SDK for Python. Use for publishing events, handling CloudEvents, and event-driven architectures. Triggers: "event grid", "EventGridPublisherClient", "CloudEvent", "EventGridEvent", "publish events".
- package
- azure-eventgrid
- risk
- safe
- source
- community
- license
- MIT
# Azure Event Grid SDK for Python
Event routing service for building event-driven applications with pub/sub semantics.
## Installation
```bash
pip install azure-eventgrid azure-identity
```
## Environment Variables
```bash
EVENTGRID_TOPIC_ENDPOINT=https://<topic-name>.<region>.eventgrid.azure.net/api/events
EVENTGRID_NAMESPACE_ENDPOINT=https://<namespace>.<region>.eventgrid.azure.net
```
## Authentication
```python
from azure.identity import DefaultAzureCredential
from azure.eventgrid import EventGridPublisherClient
credential = DefaultAzureCredential()
endpoint = "https://<topic-name>.<region>.eventgrid.azure.net/api/events"
client = EventGridPublisherClient(endpoint, credential)
```
## Event Types
| Format | Class | Use Case |
|--------|-------|----------|
| Cloud Events 1.0 | `CloudEvent` | Standard, interoperable (recommended) |
| Event Grid Schema | `EventGridEvent` | Azure-native format |
## Publish CloudEvents
```python
from azure.eventgrid import EventGridPublisherClient, CloudEvent
from azure.identity import DefaultAzureCredential
client = EventGridPublisherClient(endpoint, DefaultAzureCredential())
# Single event
event = CloudEvent(
type="MyApp.Events.OrderCreated",
source="/myapp/orders",
data={"order_id": "12345", "amount": 99.99}
)
client.send(event)
# Multiple events
events = [
CloudEvent(
type="MyApp.Events.OrderCreated",
source="/myapp/orders",
data={"order_id": f"order-{i}"}
)
for i in range(10)
]
client.send(events)
```
## Publish EventGridEvents
```python
from azure.eventgrid import EventGridEvent
from datetime import datetime, timezone
event = EventGridEvent(
subject="/myapp/orders/12345",
event_type="MyApp.Events.OrderCreated",
data={"order_id": "12345", "amount": 99.99},
data_version="1.0"
)
client.send(event)
```
## Event Properties
### CloudEvent Properties
```python
event = CloudEvent(
type="MyApp.Events.ItemCreated", # Required: event type
source="/myapp/items", # Required: event source
data={"key": "value"}, # Event payload
subject="items/123", # Optional: subject/path
datacontenttype="application/json", # Optional: content type
dataschema="https://schema.example", # Optional: schema URL
time=datetime.now(timezone.utc), # Optional: timestamp
extensions={"custom": "value"} # Optional: custom attributes
)
```
### EventGridEvent Properties
```python
event = EventGridEvent(
subject="/myapp/items/123", # Required: subject
event_type="MyApp.ItemCreated", # Required: event type
data={"key": "value"}, # Required: event payload
data_version="1.0", # Required: schema version
topic="/subscriptions/.../topics/...", # Optional: auto-set
event_time=datetime.now(timezone.utc) # Optional: timestamp
)
```
## Async Client
```python
from azure.eventgrid.aio import EventGridPublisherClient
from azure.identity.aio import DefaultAzureCredential
async def publish_events():
credential = DefaultAzureCredential()
async with EventGridPublisherClient(endpoint, credential) as client:
event = CloudEvent(
type="MyApp.Events.Test",
source="/myapp",
data={"message": "hello"}
)
await client.send(event)
import asyncio
asyncio.run(publish_events())
```
## Namespace Topics (Event Grid Namespaces)
For Event Grid Namespaces (pull delivery):
```python
from azure.eventgrid.aio import EventGridPublisherClient
# Namespace endpoint (different from custom topic)
namespace_endpoint = "https://<namespace>.<region>.eventgrid.azure.net"
topic_name = "my-topic"
async with EventGridPublisherClient(
endpoint=namespace_endpoint,
credential=DefaultAzureCredential()
) as client:
await client.send(
event,
namespace_topic=topic_name
)
```
## Best Practices
1. **Use CloudEvents** for new applications (industry standard)
2. **Batch events** when publishing multiple events
3. **Include meaningful subjects** for filtering
4. **Use async client** for high-throughput scenarios
5. **Handle retries** — Event Grid has built-in retry
6. **Set appropriate event types** for routing and filtering
## When to Use
Azure Event Grid SDK for Python. Use for publishing events, handling CloudEvents, and event-driven architectures.
Covers: Azure Event Grid SDK for Python, Environment Variables, Authentication, Event Types, Publish CloudEvents.
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