# Need clarification on asyncio.Condition

**URL:** <https://discuss.python.org/t/need-clarification-on-asyncio-condition/90932>\
**Category:** Python Help\
**Created:** [May 6, 2025, 10:16am UTC](https://discuss.python.org/t/need-clarification-on-asyncio-condition/90932 "2025-05-06T10:16:37Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![axzxc1236](https://sea2.discourse-cdn.com/flex002/user_avatar/discuss.python.org/axzxc1236/32/25773_2.png) [@axzxc1236](https://discuss.python.org/u/axzxc1236)\
**Post date:** [May 6, 2025, 10:16am UTC](https://discuss.python.org/t/need-clarification-on-asyncio-condition/90932/1 "2025-05-06T10:16:37Z")

</div>

Recently I done a program with quart (web server framework) that allows admins to broadcast messages like so.

```python
data = "string"
broadcast_condition = asyncio.Condition

@app.post("/admin/update_secret")
@login_required
async def update_secret():
    global data
    # ... parse data
    data = new_value
    async with broadcast_condition:
        broadcast_condition.notify_all()

@app.websocket('/ws')
async def ws():
    websocket.accept()
    await websocket.send(data)
    async with broadcast_condition:
        while (await broadcast_condition.wait()):
            await websocket.send(data)

```

What the program does is whenever update\_secret() is called, all websocket client on ws() should receive a copy and the code looks neat… that’s what I thought.

I have a few question with this code:

1. what if update\_secret() is spammed very frequently, like for every websocket.send() is processed there are two notify\_all() calls, does the while loop only process once in this case?

2. What if an admin disconnects (e.g. bad Wi-Fi) while quart is doing notify\_all(), and quart cancels asyncio task (asyncio.CancelledError is thrown) before notify\_all() is complete? does some client not get notified in that case?

3. does notify\_all() call take more time if more websocket client wait on the condition? (10 clients vs 200 clients?, is it posiible that webserver times out update\_secret() because it takes too long)

4. Is it possible that notify\_all() only ensure every client executes at least once? Like it doesn’t care if client A’s while loop executes 100 times before executing client B’s while loop? and after notify\_all() completes different client receives message different times.