Lambda / Client / get_function

get_function

Lambda.Client.get_function(**kwargs)

Returns information about the function or function version, with a link to download the deployment package that’s valid for 10 minutes. If you specify a function version, only details that are specific to that version are returned.

See also: AWS API Documentation

Request Syntax

response = client.get_function(
    FunctionName='string',
    Qualifier='string'
)

Parameters:

• FunctionName (string) –

  [REQUIRED]

  The name of the Lambda function, version, or alias.

  Name formats

  • Function name – my-function (name-only), my-function:v1 (with alias).

  • Function ARN – arn:aws:lambda:us-west-2:123456789012:function:my-function.

  • Partial ARN – 123456789012:function:my-function.

  You can append a version number or alias to any of the formats. The length constraint applies only to the full ARN. If you specify only the function name, it is limited to 64 characters in length.

• Qualifier (string) – Specify a version or alias to get details about a published version of the function.

Return type:

dict

Returns:

Response Syntax

{
    'Configuration': {
        'FunctionName': 'string',
        'FunctionArn': 'string',
        'Runtime': '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',
        'Role': 'string',
        'Handler': 'string',
        'CodeSize': 123,
        'Description': 'string',
        'Timeout': 123,
        'MemorySize': 123,
        'LastModified': 'string',
        'CodeSha256': 'string',
        'Version': 'string',
        'VpcConfig': {
            'SubnetIds': [
                'string',
            ],
            'SecurityGroupIds': [
                'string',
            ],
            'VpcId': 'string'
        },
        'DeadLetterConfig': {
            'TargetArn': 'string'
        },
        'Environment': {
            'Variables': {
                'string': 'string'
            },
            'Error': {
                'ErrorCode': 'string',
                'Message': 'string'
            }
        },
        'KMSKeyArn': 'string',
        'TracingConfig': {
            'Mode': 'Active'|'PassThrough'
        },
        'MasterArn': 'string',
        'RevisionId': 'string',
        'Layers': [
            {
                'Arn': 'string',
                'CodeSize': 123,
                'SigningProfileVersionArn': 'string',
                'SigningJobArn': 'string'
            },
        ],
        'State': 'Pending'|'Active'|'Inactive'|'Failed',
        'StateReason': 'string',
        'StateReasonCode': 'Idle'|'Creating'|'Restoring'|'EniLimitExceeded'|'InsufficientRolePermissions'|'InvalidConfiguration'|'InternalError'|'SubnetOutOfIPAddresses'|'InvalidSubnet'|'InvalidSecurityGroup'|'ImageDeleted'|'ImageAccessDenied'|'InvalidImage'|'KMSKeyAccessDenied'|'KMSKeyNotFound'|'InvalidStateKMSKey'|'DisabledKMSKey'|'EFSIOError'|'EFSMountConnectivityError'|'EFSMountFailure'|'EFSMountTimeout'|'InvalidRuntime'|'InvalidZipFileException'|'FunctionError',
        'LastUpdateStatus': 'Successful'|'Failed'|'InProgress',
        'LastUpdateStatusReason': 'string',
        'LastUpdateStatusReasonCode': 'EniLimitExceeded'|'InsufficientRolePermissions'|'InvalidConfiguration'|'InternalError'|'SubnetOutOfIPAddresses'|'InvalidSubnet'|'InvalidSecurityGroup'|'ImageDeleted'|'ImageAccessDenied'|'InvalidImage'|'KMSKeyAccessDenied'|'KMSKeyNotFound'|'InvalidStateKMSKey'|'DisabledKMSKey'|'EFSIOError'|'EFSMountConnectivityError'|'EFSMountFailure'|'EFSMountTimeout'|'InvalidRuntime'|'InvalidZipFileException'|'FunctionError',
        'FileSystemConfigs': [
            {
                'Arn': 'string',
                'LocalMountPath': 'string'
            },
        ],
        'PackageType': 'Zip'|'Image',
        'ImageConfigResponse': {
            'ImageConfig': {
                'EntryPoint': [
                    'string',
                ],
                'Command': [
                    'string',
                ],
                'WorkingDirectory': 'string'
            },
            'Error': {
                'ErrorCode': 'string',
                'Message': 'string'
            }
        },
        'SigningProfileVersionArn': 'string',
        'SigningJobArn': 'string',
        'Architectures': [
            'x86_64'|'arm64',
        ],
        'EphemeralStorage': {
            'Size': 123
        },
        'SnapStart': {
            'ApplyOn': 'PublishedVersions'|'None',
            'OptimizationStatus': 'On'|'Off'
        },
        'RuntimeVersionConfig': {
            'RuntimeVersionArn': 'string',
            'Error': {
                'ErrorCode': 'string',
                'Message': 'string'
            }
        }
    },
    'Code': {
        'RepositoryType': 'string',
        'Location': 'string',
        'ImageUri': 'string',
        'ResolvedImageUri': 'string'
    },
    'Tags': {
        'string': 'string'
    },
    'Concurrency': {
        'ReservedConcurrentExecutions': 123
    }
}

Response Structure

• (dict) –

  • Configuration (dict) –

    The configuration of the function or version.

    • FunctionName (string) –

      The name of the function.

    • FunctionArn (string) –

      The function’s Amazon Resource Name (ARN).

    • Runtime (string) –

      The runtime environment for the Lambda function.

    • Role (string) –

      The function’s execution role.

    • Handler (string) –

      The function that Lambda calls to begin running your function.

    • CodeSize (integer) –

      The size of the function’s deployment package, in bytes.

    • Description (string) –

      The function’s description.

    • Timeout (integer) –

      The amount of time in seconds that Lambda allows a function to run before stopping it.

    • MemorySize (integer) –

      The amount of memory available to the function at runtime.

    • LastModified (string) –

      The date and time that the function was last updated, in ISO-8601 format (YYYY-MM-DDThh:mm:ss.sTZD).

    • CodeSha256 (string) –

      The SHA256 hash of the function’s deployment package.

    • Version (string) –

      The version of the Lambda function.

    • VpcConfig (dict) –

      The function’s networking configuration.

      • SubnetIds (list) –

        A list of VPC subnet IDs.

        • (string) –

      • SecurityGroupIds (list) –

        A list of VPC security group IDs.

        • (string) –

      • VpcId (string) –

        The ID of the VPC.

    • DeadLetterConfig (dict) –

      The function’s dead letter queue.

      • TargetArn (string) –

        The Amazon Resource Name (ARN) of an Amazon SQS queue or Amazon SNS topic.

    • Environment (dict) –

      The function’s environment variables. Omitted from CloudTrail logs.

      • Variables (dict) –

        Environment variable key-value pairs. Omitted from CloudTrail logs.

        • (string) –

          • (string) –

      • Error (dict) –

        Error messages for environment variables that couldn’t be applied.

        • ErrorCode (string) –

          The error code.

        • Message (string) –

          The error message.

    • KMSKeyArn (string) –

      The KMS key that’s used to encrypt the function’s environment variables. When Lambda SnapStart is activated, this key is also used to encrypt the function’s snapshot. This key is returned only if you’ve configured a customer managed key.

    • TracingConfig (dict) –

      The function’s X-Ray tracing configuration.

      • Mode (string) –

        The tracing mode.

    • MasterArn (string) –

      For Lambda@Edge functions, the ARN of the main function.

    • RevisionId (string) –

      The latest updated revision of the function or alias.

    • Layers (list) –

      The function’s layers.

      • (dict) –

        An Lambda layer.

        • Arn (string) –

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

        • CodeSize (integer) –

          The size of the layer archive in bytes.

        • SigningProfileVersionArn (string) –

          The Amazon Resource Name (ARN) for a signing profile version.

        • SigningJobArn (string) –

          The Amazon Resource Name (ARN) of a signing job.

    • State (string) –

      The current state of the function. When the state is Inactive, you can reactivate the function by invoking it.

    • StateReason (string) –

      The reason for the function’s current state.

    • StateReasonCode (string) –

      The reason code for the function’s current state. When the code is Creating, you can’t invoke or modify the function.

    • LastUpdateStatus (string) –

      The status of the last update that was performed on the function. This is first set to Successful after function creation completes.

    • LastUpdateStatusReason (string) –

      The reason for the last update that was performed on the function.

    • LastUpdateStatusReasonCode (string) –

      The reason code for the last update that was performed on the function.

    • FileSystemConfigs (list) –

      Connection settings for an Amazon EFS file system.

      • (dict) –

        Details about the connection between a Lambda function and an Amazon EFS file system.

        • Arn (string) –

          The Amazon Resource Name (ARN) of the Amazon EFS access point that provides access to the file system.

        • LocalMountPath (string) –

          The path where the function can access the file system, starting with /mnt/.

    • PackageType (string) –

      The type of deployment package. Set to Image for container image and set Zip for .zip file archive.

    • ImageConfigResponse (dict) –

      The function’s image configuration values.

      • ImageConfig (dict) –

        Configuration values that override the container image Dockerfile.

        • EntryPoint (list) –

          Specifies the entry point to their application, which is typically the location of the runtime executable.

          • (string) –

        • Command (list) –

          Specifies parameters that you want to pass in with ENTRYPOINT.

          • (string) –

        • WorkingDirectory (string) –

          Specifies the working directory.

      • Error (dict) –

        Error response to GetFunctionConfiguration.

        • ErrorCode (string) –

          Error code.

        • Message (string) –

          Error message.

    • SigningProfileVersionArn (string) –

      The ARN of the signing profile version.

    • SigningJobArn (string) –

      The ARN of the signing job.

    • Architectures (list) –

      The instruction set architecture that the function supports. Architecture is a string array with one of the valid values. The default architecture value is x86_64.

      • (string) –

    • EphemeralStorage (dict) –

      The size of the function’s /tmp directory in MB. The default value is 512, but it can be any whole number between 512 and 10,240 MB.

      • Size (integer) –

        The size of the function’s /tmp directory.

    • SnapStart (dict) –

      Set ApplyOn to PublishedVersions to create a snapshot of the initialized execution environment when you publish a function version. For more information, see Improving startup performance with Lambda SnapStart.

      • ApplyOn (string) –

        When set to PublishedVersions, Lambda creates a snapshot of the execution environment when you publish a function version.

      • OptimizationStatus (string) –

        When you provide a qualified Amazon Resource Name (ARN), this response element indicates whether SnapStart is activated for the specified function version.

    • RuntimeVersionConfig (dict) –

      The ARN of the runtime and any errors that occured.

      • RuntimeVersionArn (string) –

        The ARN of the runtime version you want the function to use.

      • Error (dict) –

        Error response when Lambda is unable to retrieve the runtime version for a function.

        • ErrorCode (string) –

          The error code.

        • Message (string) –

          The error message.

  • Code (dict) –

    The deployment package of the function or version.

    • RepositoryType (string) –

      The service that’s hosting the file.

    • Location (string) –

      A presigned URL that you can use to download the deployment package.

    • ImageUri (string) –

      URI of a container image in the Amazon ECR registry.

    • ResolvedImageUri (string) –

      The resolved URI for the image.

  • Tags (dict) –

    The function’s tags.

    • (string) –

      • (string) –

  • Concurrency (dict) –

    The function’s reserved concurrency.

    • ReservedConcurrentExecutions (integer) –

      The number of concurrent executions that are reserved for this function. For more information, see Managing Lambda reserved concurrency.

Exceptions

• Lambda.Client.exceptions.ServiceException

• Lambda.Client.exceptions.ResourceNotFoundException

• Lambda.Client.exceptions.TooManyRequestsException

• Lambda.Client.exceptions.InvalidParameterValueException

Examples

The following example returns code and configuration details for version 1 of a function named my-function.

response = client.get_function(
    FunctionName='my-function',
    Qualifier='1',
)

print(response)

Expected Output:

{
    'Code': {
        'Location': 'https://awslambda-us-west-2-tasks.s3.us-west-2.amazonaws.com/snapshots/123456789012/my-function-e7d9d1ed-xmpl-4f79-904a-4b87f2681f30?versionId=sH3TQwBOaUy...',
        'RepositoryType': 'S3',
    },
    'Configuration': {
        'CodeSha256': 'YFgDgEKG3ugvF1+pX64gV6tu9qNuIYNUdgJm8nCxsm4=',
        'CodeSize': 5797206,
        'Description': 'Process image objects from Amazon S3.',
        'Environment': {
            'Variables': {
                'BUCKET': 'my-bucket-1xpuxmplzrlbh',
                'PREFIX': 'inbound',
            },
        },
        'FunctionArn': 'arn:aws:lambda:us-west-2:123456789012:function:my-function',
        'FunctionName': 'my-function',
        'Handler': 'index.handler',
        'KMSKeyArn': 'arn:aws:kms:us-west-2:123456789012:key/b0844d6c-xmpl-4463-97a4-d49f50839966',
        'LastModified': '2020-04-10T19:06:32.563+0000',
        'LastUpdateStatus': 'Successful',
        'MemorySize': 256,
        'RevisionId': 'b75dcd81-xmpl-48a8-a75a-93ba8b5b9727',
        'Role': 'arn:aws:iam::123456789012:role/lambda-role',
        'Runtime': 'nodejs12.x',
        'State': 'Active',
        'Timeout': 15,
        'TracingConfig': {
            'Mode': 'Active',
        },
        'Version': '$LATEST',
    },
    'Tags': {
        'DEPARTMENT': 'Assets',
    },
    'ResponseMetadata': {
        '...': '...',
    },
}