Fixed D-wave examples breaking when the Advantage_System4 is in a maintenance window

[JuanGiraldo0212]

Issue #117: D-Wave examples break during scheduled maintenance windows

Description of changes:

Added branching logic to find the first Advantage device available to these files:

1. Getting_Devices_and_Checking_Device_Properties.ipynb
2. Dwave_MinimumVertexCoverProblem.ipynb
3. Dwave_Anatomy.ipynb
4. Running_large_problems_using_QBSolv.ipynb

Removed the device ARN when instantiating a D-wave sampler to these files:

1. Dwave_MaximumCut.ipynb
2. Dwave_GraphPartitioning.ipynb
3. Dwave_StructuralImbalance/Dwave_StructuralImbalance.ipynb

Removed unnecessary cells.

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[christianbmadsen]

In cell 3 of Dwave_Anatomy.ipynb can you make the behavior of the cell graceful even in cases where no Advantage device is online?
In the same notebook the Cell 27 and onwards is broken, can you fix?

[JuanGiraldo0212]

Yes @christianbmadsen I'll fix that.

[christianbmadsen]

@JuanGiraldo0212 were you able to take a look at the edge cases for online devices. For instance what do you want the behavior of cell 8 of Getting_Devices_and_Checking_Device_Properties.ipynb to be if no devices are ONLINE? Thanks!

[JuanGiraldo0212]

Hi @christianbmadsen, yes I used this logic in the case no Advantage devices are ONLINE:

device_arns = [device.arn for device in AwsDevice.get_devices(provider_names=["D-Wave Systems"], statuses=["ONLINE"])]
adv_device_arns = list(filter(lambda arn: "Advantage" in arn, device_arns))
adv_device_arns = []
if adv_device_arns:
device = AwsDevice(adv_device_arns[0])
else:
device = AwsDevice(device_arns[0])

I used it in cell 47 of Dwave_Anatomy, let me know if this is a good fix and I will add it to the rest of the notebooks where an Advantage device is needed.

[christianbmadsen]

@JuanGiraldo0212 I recommend we only try the intended advatage device and then handle the exception and avoid executing the remainder of the example if no advantage device is available.

[christianbmadsen]

@JuanGiraldo0212 I recommend we only try the intended advatage device and then handle the exception and avoid executing the remainder of the example if no advantage device is available.

@JuanGiraldo0212 just wanted to checkin and see how you were planning to handle this?

[JuanGiraldo0212]

Hi @christianbmadsen, sorry I haven't had chance to finish the issue. I was planning on checking if there is an advantage device available and in the case that there aren't any I would display a message asking to wait until the requested device is online to continue the example.