**To create a Lambda layer version** The following ``publish-layer-version`` example creates a new Python library layer version. The command retrieves the layer content a file named ``layer.zip`` in the specified S3 bucket. :: aws lambda publish-layer-version \ --layer-name my-layer \ --description "My Python layer" \ --license-info "MIT" \ --content S3Bucket=lambda-layers-us-west-2-123456789012,S3Key=layer.zip \ --compatible-runtimes python3.6 python3.7 Output:: { "Content": { "Location": "https://awslambda-us-west-2-layers.s3.us-west-2.amazonaws.com/snapshots/123456789012/my-layer-4aaa2fbb-ff77-4b0a-ad92-5b78a716a96a?versionId=27iWyA73cCAYqyH...", "CodeSha256": "tv9jJO+rPbXUUXuRKi7CwHzKtLDkDRJLB3cC3Z/ouXo=", "CodeSize": 169 }, "LayerArn": "arn:aws:lambda:us-west-2:123456789012:layer:my-layer", "LayerVersionArn": "arn:aws:lambda:us-west-2:123456789012:layer:my-layer:1", "Description": "My Python layer", "CreatedDate": "2018-11-14T23:03:52.894+0000", "Version": 1, "LicenseInfo": "MIT", "CompatibleRuntimes": [ "python3.6", "python3.7" ] } For more information, see `AWS Lambda Layers <https://docs.aws.amazon.com/lambda/latest/dg/configuration-layers.html>`__ in the *AWS Lambda Developer Guide*.