mirror of
https://github.com/Brandon-Rozek/website.git
synced 2024-11-09 18:50:34 -05:00
24 lines
843 B
Markdown
24 lines
843 B
Markdown
---
|
|
title: "Quick Python: Async Callbacks"
|
|
date: 2020-07-11T20:23:29-04:00
|
|
draft: false
|
|
tags: ["python"]
|
|
---
|
|
|
|
I've written a post on using [callbacks in Python](https://brandonrozek.com/blog/pysubscribepattern/). Though to add callbacks to `asyncio` functions, you'll have to interact with the loop object directly. Replace the emit function in the previous post with the following:
|
|
```python
|
|
class Application:
|
|
# ...
|
|
def emit(self, message):
|
|
for callback in self.callbacks:
|
|
if asyncio.iscoroutine(callback):
|
|
loop = asyncio.get_running_loop()
|
|
loop.call_soon(
|
|
functools.partial(
|
|
asyncio.ensure_future,
|
|
callback(message)
|
|
)
|
|
)
|
|
else:
|
|
callback(message)
|
|
```
|