AWS Lambda no longer supports Python 2.7 - CFN Templates Broken

[TimekillerTK]

Hi!

As title says, many CFN templates from the repo (including the One-Click Deploys in the lessons), have the following error:

Message is self explanatory.

For the IPv6Workaround lambdas, changing the runtime string from python2.7 to python3.7 works, so it can be a quick find/replace fix for those, the result from cloudwatch logs of the Lambda run is a 200:

2021-10-19T18:08:27.387+02:00
{
    "Status": "SUCCESS",
    "Reason": "See the details in CloudWatch Log Stream: 2021/10/19/[$LATEST]a59c7dbd3c3942c2ae41d2ce2d599b10",
    "PhysicalResourceId": "CustomResourcePhysicalID",
    "StackId": "arn:aws:cloudformation:us-east-1:167865304106:stack/A4LTest/a2c1a310-30f6-11ec-9d5b-0a8610a92c17",
    "RequestId": "e79d5b7b-f1e0-4a2f-9573-478983f6e68e",
    "LogicalResourceId": "IPv6WorkaroundSubnetWEBC",
    "NoEcho": false,
    "Data": {
        "SubnetId": "subnet-087382866630c9320"
    }
}

Only issue is this warning:

2021-10-19T18:08:25.209+02:00
/var/task/index.py:5: SyntaxWarning: "is" with a literal. Did you mean "=="?