How to use BleakClient without 'async with' ?

[zapta]

I have the two test programs below that are supposed to do the same thing. Test1 does use 'async with' and works while Test2 which doesn't user 'async with' doesn't and throws a Service Discovery has not been performed yet exception. My question is, is it possible to modify test2 to work without using the 'async with' clause? My application is based on the the pyqtgraph frameworks and runs on callback from the framework such that I can't have my own main with 'async with'.

I will also appreciate some insight what does the 'async with' provide, I guess some life cycle management but I could not find python documentation that I could understand.

async def test1():
    print(f"Trying to connect to {device_address}", flush=True)
    device = await BleakScanner.find_device_by_address(device_address, timeout=10.0)
    assert device
    async with BleakClient(device) as client:
        assert client.is_connected
        print(f"Connected", flush=True)
        service = client.services.get_service("6b6a78d7-8ee0-4a26-ba7b-62e357dd9720")
        assert(service)

async def test2():
    print(f"Trying to connect to {device_address}", flush=True)
    device = await BleakScanner.find_device_by_address(device_address, timeout=10.0)
    assert device
    client =   BleakClient(device) 
    assert client.is_connected()
    print(f"Connected", flush=True)
    service = client.services.get_service("6b6a78d7-8ee0-4a26-ba7b-62e357dd9720")
    assert(service)

[zapta]

Ok, I think I found it, it seems that the difference is in the implicit calls to aenter() and aexit(), and that the code below does work. Am I missing something?

async def test3():
    print(f"Trying to connect to {device_address}", flush=True)
    device = await BleakScanner.find_device_by_address(device_address, timeout=10.0)
    assert device
    client =   BleakClient(device) 
    assert client.is_connected()
    await client.__aenter__()    ## <---
    print(f"Connected", flush=True)
    service = client.services.get_service("6b6a78d7-8ee0-4a26-ba7b-62e357dd9720")
    assert(service)
    await client.__aexit__(None, None, None)   ## <---

[zapta]

Ok, this thread ends up with the obvious, but I don't know how to delete it. aenter() and aexit() are equivalent to connect(), disconnect().