Lambda / Client / list_layers

list_layers

Lambda.Client.list_layers(**kwargs)

Lists Lambda layers and shows information about the latest version of each. Specify a runtime identifier to list only layers that indicate that they’re compatible with that runtime. Specify a compatible architecture to include only layers that are compatible with that instruction set architecture.

See also: AWS API Documentation

Request Syntax

response = client.list_layers(
    CompatibleRuntime='nodejs'|'nodejs4.3'|'nodejs6.10'|'nodejs8.10'|'nodejs10.x'|'nodejs12.x'|'nodejs14.x'|'nodejs16.x'|'java8'|'java8.al2'|'java11'|'python2.7'|'python3.6'|'python3.7'|'python3.8'|'python3.9'|'dotnetcore1.0'|'dotnetcore2.0'|'dotnetcore2.1'|'dotnetcore3.1'|'dotnet6'|'nodejs4.3-edge'|'go1.x'|'ruby2.5'|'ruby2.7'|'provided'|'provided.al2'|'nodejs18.x',
    Marker='string',
    MaxItems=123,
    CompatibleArchitecture='x86_64'|'arm64'
)

Parameters:

• CompatibleRuntime (string) – A runtime identifier. For example, go1.x.

• Marker (string) – A pagination token returned by a previous call.

• MaxItems (integer) – The maximum number of layers to return.

• CompatibleArchitecture (string) – The compatible instruction set architecture.

Return type:

dict

Returns:

Response Syntax

{
    'NextMarker': 'string',
    'Layers': [
        {
            'LayerName': 'string',
            'LayerArn': 'string',
            'LatestMatchingVersion': {
                'LayerVersionArn': 'string',
                'Version': 123,
                'Description': 'string',
                'CreatedDate': 'string',
                'CompatibleRuntimes': [
                    'nodejs'|'nodejs4.3'|'nodejs6.10'|'nodejs8.10'|'nodejs10.x'|'nodejs12.x'|'nodejs14.x'|'nodejs16.x'|'java8'|'java8.al2'|'java11'|'python2.7'|'python3.6'|'python3.7'|'python3.8'|'python3.9'|'dotnetcore1.0'|'dotnetcore2.0'|'dotnetcore2.1'|'dotnetcore3.1'|'dotnet6'|'nodejs4.3-edge'|'go1.x'|'ruby2.5'|'ruby2.7'|'provided'|'provided.al2'|'nodejs18.x',
                ],
                'LicenseInfo': 'string',
                'CompatibleArchitectures': [
                    'x86_64'|'arm64',
                ]
            }
        },
    ]
}

Response Structure

• (dict) –

  • NextMarker (string) –

    A pagination token returned when the response doesn’t contain all layers.

  • Layers (list) –

    A list of function layers.

    • (dict) –

      Details about an Lambda layer.

      • LayerName (string) –

        The name of the layer.

      • LayerArn (string) –

        The Amazon Resource Name (ARN) of the function layer.

      • LatestMatchingVersion (dict) –

        The newest version of the layer.

        • LayerVersionArn (string) –

          The ARN of the layer version.

        • Version (integer) –

          The version number.

        • Description (string) –

          The description of the version.

        • CreatedDate (string) –

          The date that the version was created, in ISO 8601 format. For example, 2018-11-27T15:10:45.123+0000.

        • CompatibleRuntimes (list) –

          The layer’s compatible runtimes.

          • (string) –

        • LicenseInfo (string) –

          The layer’s open-source license.

        • CompatibleArchitectures (list) –

          A list of compatible instruction set architectures.

          • (string) –

Exceptions

• Lambda.Client.exceptions.ServiceException

• Lambda.Client.exceptions.InvalidParameterValueException

• Lambda.Client.exceptions.TooManyRequestsException

Examples

The following example returns information about layers that are compatible with the Python 3.7 runtime.

response = client.list_layers(
    CompatibleRuntime='python3.7',
)

print(response)

Expected Output:

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