import asyncio
from bleak import BleakScanner

async def main():
    devices = await BleakScanner.discover()
    for d in devices:
        print(d)

asyncio.run(main())

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/opt/homebrew/Cellar/python@3.10/3.10.6_2/Frameworks/Python.framework/Versions/3.10/lib/python3.10/asyncio/runners.py", line 44, in run
    return loop.run_until_complete(main)
  File "/opt/homebrew/Cellar/python@3.10/3.10.6_2/Frameworks/Python.framework/Versions/3.10/lib/python3.10/asyncio/base_events.py", line 646, in run_until_complete
    return future.result()
  File "<stdin>", line 2, in main
  File "/opt/homebrew/lib/python3.10/site-packages/bleak/backends/scanner.py", line 123, in discover
    async with cls(**kwargs) as scanner:
  File "/opt/homebrew/lib/python3.10/site-packages/bleak/backends/corebluetooth/scanner.py", line 70, in __init__
    self._manager = CentralManagerDelegate.alloc().init()
  File "/opt/homebrew/lib/python3.10/site-packages/bleak/backends/corebluetooth/CentralManagerDelegate.py", line 88, in init
    raise BleakError("Bluetooth device is turned off")
bleak.exc.BleakError: Bluetooth device is turned off

Exception ignored in: <CentralManagerDelegate objective-c instance 0x0>
Traceback (most recent call last):
  File "/Users/harshalpatil/.espressif/python_env/idf5.1_py3.10_env/lib/python3.10/site-packages/bleak/backends/corebluetooth/CentralManagerDelegate.py", line 102, in __del__
IndexError: NSRangeException - Cannot remove an observer <CentralManagerDelegate 0x126623430> for the key path "isScanning" from <CBCentralManager 0x60000098c980> because it is not registered as an observer.
Exception ignored in: <function CentralManagerDelegate.__del__ at 0x102a13640>