"discovered_devices_and_advertisement_data" doesn't return dictionary

[jcolebaker]

According to the docs, the BleakScanner.discovered_devices_and_advertisement_data property should return Dict[str, Tuple[[BLEDevice], [AdvertisementData]]

I am trying to use it to get the advertisement data after finding a device by name, but I get an error. Here is the code:

import asyncio
from bleak import *

DEVICE_NAME = "MyDevice"

async def test_find_device():
    device = await BleakScanner.find_device_by_name(DEVICE_NAME)

    if device == None:
        print("Device not found!")
        return

    print("discovered_devices_and_advertisement_data: ", BleakScanner.discovered_devices_and_advertisement_data)

    (_, ble_advert_data) = BleakScanner.discovered_devices_and_advertisement_data[DEVICE_NAME]
    print(ble_advert_data)


if __name__ == '__main__':
    loop = asyncio.get_event_loop()
    loop.run_until_complete(test_find_device())

I get the following output (Windows 10):

discovered_devices_and_advertisement_data:  <property object at 0x0000012D5CA79310>
Traceback (most recent call last):
  File "C:\Users\Jeremycb\esp\wireless-controller\system_tests\test2.py", line 22, in <module>
    loop.run_until_complete(test_find_device())
  File "C:\Users\Jeremycb\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 642, in run_until_complete
    return future.result()
  File "C:\Users\Jeremycb\esp\wireless-controller\system_tests\test2.py", line 15, in test_find_device
    (_, ble_advert_data) = BleakScanner.discovered_devices_and_advertisement_data[DEVICE_NAME]
TypeError: 'property' object is not subscriptable

It definitely finds my BLE device, and I can use the returned "device" object to create a client and connect.

I also tried BleakScanner.discovered_devices_and_advertisement_data.keys() and BleakScanner.discovered_devices_and_advertisement_data.value() but these don't exist. (Exception: 'property' object has no attribute 'keys', etc).

Am I using this property incorrectly? Have I made a stupid Python error?

Python 3.9.2
bleak                     0.20.0
bleak-winrt               1.2.0

[dlech]

discovered_devices_and_advertisement_data is an instance property, so it can't be used this way since you aren't creating an instance of BleakScanner.

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