To list the layers that are compatible with your function's runtime

The following list-layers example displays information about layers that are compatible with the Python 3.7 runtime.

aws lambda list-layers \
    --compatible-runtime python3.7

Output:

{
    "Layers": [
        {
            "LayerName": "my-layer",
            "LayerArn": "arn:aws:lambda:us-east-2:123456789012:layer:my-layer",
            "LatestMatchingVersion": {
                "LayerVersionArn": "arn:aws:lambda:us-east-2:123456789012:layer:my-layer:2",
                "Version": 2,
                "Description": "My layer",
                "CreatedDate": "2018-11-15T00:37:46.592+0000",
                "CompatibleRuntimes": [
                    "python3.6",
                    "python3.7"
                ]
            }
        }
    ]
}

For more information, see AWS Lambda Layers in the AWS Lambda Developer Guide.