awslambdapython

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 Go to latest Published: Aug 18, 2022 License: Apache-2.0 Imports: 15 Imported by: 0

README

Amazon Lambda Python Library

This library provides constructs for Python Lambda functions.

To use this module, you will need to have Docker installed.

Python Function

Define a PythonFunction:

lambda.NewPythonFunction(this, jsii.String("MyFunction"), &pythonFunctionProps{
	entry: jsii.String("/path/to/my/function"),
	 // required
	runtime: awscdk.Runtime_PYTHON_3_8(),
	 // required
	index: jsii.String("my_index.py"),
	 // optional, defaults to 'index.py'
	handler: jsii.String("my_exported_func"),
})

All other properties of lambda.Function are supported, see also the AWS Lambda construct library.

Python Layer

You may create a python-based lambda layer with PythonLayerVersion. If PythonLayerVersion detects a requirements.txt or Pipfile or poetry.lock with the associated pyproject.toml at the entry path, then PythonLayerVersion will include the dependencies inline with your code in the layer.

Define a PythonLayerVersion:

lambda.NewPythonLayerVersion(this, jsii.String("MyLayer"), &pythonLayerVersionProps{
	entry: jsii.String("/path/to/my/layer"),
})

A layer can also be used as a part of a PythonFunction:

lambda.NewPythonFunction(this, jsii.String("MyFunction"), &pythonFunctionProps{
	entry: jsii.String("/path/to/my/function"),
	runtime: awscdk.Runtime_PYTHON_3_8(),
	layers: []iLayerVersion{
		lambda.NewPythonLayerVersion(this, jsii.String("MyLayer"), &pythonLayerVersionProps{
			entry: jsii.String("/path/to/my/layer"),
		}),
	},
})

Packaging

If requirements.txt, Pipfile or poetry.lock exists at the entry path, the construct will handle installing all required modules in a Lambda compatible Docker container according to the runtime and with the Docker platform based on the target architecture of the Lambda function.

Python bundles are only recreated and published when a file in a source directory has changed. Therefore (and as a general best-practice), it is highly recommended to commit a lockfile with a list of all transitive dependencies and their exact versions. This will ensure that when any dependency version is updated, the bundle asset is recreated and uploaded.

To that end, we recommend using [pipenv] or [poetry] which have lockfile support.

Packaging is executed using the Packaging class, which:

  1. Infers the packaging type based on the files present.
  2. If it sees a Pipfile or a poetry.lock file, it exports it to a compatible requirements.txt file with credentials (if they're available in the source files or in the bundling container).
  3. Installs dependencies using pip.
  4. Copies the dependencies into an asset that is bundled for the Lambda package.

Lambda with a requirements.txt

.
├── lambda_function.py # exports a function named 'handler'
├── requirements.txt # has to be present at the entry path

Lambda with a Pipfile

.
├── lambda_function.py # exports a function named 'handler'
├── Pipfile # has to be present at the entry path
├── Pipfile.lock # your lock file

Lambda with a poetry.lock

.
├── lambda_function.py # exports a function named 'handler'
├── pyproject.toml # your poetry project definition
├── poetry.lock # your poetry lock file has to be present at the entry path

Custom Bundling

Custom bundling can be performed by passing in additional build arguments that point to index URLs to private repos, or by using an entirely custom Docker images for bundling dependencies. The build args currently supported are:

  • PIP_INDEX_URL
  • PIP_EXTRA_INDEX_URL
  • HTTPS_PROXY

Additional build args for bundling that refer to PyPI indexes can be specified as:

entry := "/path/to/function"
image := awscdk.DockerImage.fromBuild(entry)

lambda.NewPythonFunction(this, jsii.String("function"), &pythonFunctionProps{
	entry: jsii.String(entry),
	runtime: awscdk.Runtime_PYTHON_3_8(),
	bundling: &bundlingOptions{
		buildArgs: map[string]*string{
			"PIP_INDEX_URL": jsii.String("https://your.index.url/simple/"),
			"PIP_EXTRA_INDEX_URL": jsii.String("https://your.extra-index.url/simple/"),
		},
	},
})

If using a custom Docker image for bundling, the dependencies are installed with pip, pipenv or poetry by using the Packaging class. A different bundling Docker image that is in the same directory as the function can be specified as:

entry := "/path/to/function"
image := awscdk.DockerImage.fromBuild(entry)

lambda.NewPythonFunction(this, jsii.String("function"), &pythonFunctionProps{
	entry: jsii.String(entry),
	runtime: awscdk.Runtime_PYTHON_3_8(),
	bundling: &bundlingOptions{
		image: image,
	},
})

Custom Bundling with Code Artifact

To use a Code Artifact PyPI repo, the PIP_INDEX_URL for bundling the function can be customized (requires AWS CLI in the build environment):

import "github.com/aws-samples/dummy/child_process"


entry := "/path/to/function"
image := awscdk.DockerImage.fromBuild(entry)

domain := "my-domain"
domainOwner := "111122223333"
repoName := "my_repo"
region := "us-east-1"
codeArtifactAuthToken := child_process.ExecSync(fmt.Sprintf("aws codeartifact get-authorization-token --domain %v --domain-owner %v --query authorizationToken --output text", domain, domainOwner)).toString().trim()

indexUrl := fmt.Sprintf("https://aws:%v@%v-%v.d.codeartifact.%v.amazonaws.com/pypi/%v/simple/", codeArtifactAuthToken, domain, domainOwner, region, repoName)

lambda.NewPythonFunction(this, jsii.String("function"), &pythonFunctionProps{
	entry: jsii.String(entry),
	runtime: awscdk.Runtime_PYTHON_3_8(),
	bundling: &bundlingOptions{
		environment: map[string]*string{
			"PIP_INDEX_URL": indexUrl,
		},
	},
})

The index URL or the token are only used during bundling and thus not included in the final asset. Setting only environment variable for PIP_INDEX_URL or PIP_EXTRA_INDEX_URL should work for accesing private Python repositories with pip, pipenv and poetry based dependencies.

If you also want to use the Code Artifact repo for building the base Docker image for bundling, use buildArgs. However, note that setting custom build args for bundling will force the base bundling image to be rebuilt every time (i.e. skip the Docker cache). Build args can be customized as:

import "github.com/aws-samples/dummy/child_process"


entry := "/path/to/function"
image := awscdk.DockerImage.fromBuild(entry)

domain := "my-domain"
domainOwner := "111122223333"
repoName := "my_repo"
region := "us-east-1"
codeArtifactAuthToken := child_process.ExecSync(fmt.Sprintf("aws codeartifact get-authorization-token --domain %v --domain-owner %v --query authorizationToken --output text", domain, domainOwner)).toString().trim()

indexUrl := fmt.Sprintf("https://aws:%v@%v-%v.d.codeartifact.%v.amazonaws.com/pypi/%v/simple/", codeArtifactAuthToken, domain, domainOwner, region, repoName)

lambda.NewPythonFunction(this, jsii.String("function"), &pythonFunctionProps{
	entry: jsii.String(entry),
	runtime: awscdk.Runtime_PYTHON_3_8(),
	bundling: &bundlingOptions{
		buildArgs: map[string]*string{
			"PIP_INDEX_URL": indexUrl,
		},
	},
})

Documentation

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func NewPythonFunction_Override 

func NewPythonFunction_Override(p PythonFunction, scope awscdk.Construct, id *string, props *PythonFunctionProps)

Experimental.

func NewPythonLayerVersion_Override 

func NewPythonLayerVersion_Override(p PythonLayerVersion, scope awscdk.Construct, id *string, props *PythonLayerVersionProps)

Experimental.

func PythonFunction_ClassifyVersionProperty 

func PythonFunction_ClassifyVersionProperty(propertyName *string, locked *bool)

Record whether specific properties in the `AWS::Lambda::Function` resource should also be associated to the Version resource.

See 'currentVersion' section in the module README for more details. Experimental.

func PythonFunction_FromFunctionArn 

func PythonFunction_FromFunctionArn(scope constructs.Construct, id *string, functionArn *string) awslambda.IFunction

Import a lambda function into the CDK using its ARN. Experimental.

func PythonFunction_FromFunctionAttributes 

func PythonFunction_FromFunctionAttributes(scope constructs.Construct, id *string, attrs *awslambda.FunctionAttributes) awslambda.IFunction

Creates a Lambda function object which represents a function not defined within this stack. Experimental.

func PythonFunction_FromFunctionName 

func PythonFunction_FromFunctionName(scope constructs.Construct, id *string, functionName *string) awslambda.IFunction

Import a lambda function into the CDK using its name. Experimental.

func PythonFunction_IsConstruct 

func PythonFunction_IsConstruct(x interface{}) *bool

Return whether the given object is a Construct. Experimental.

func PythonFunction_IsResource 

func PythonFunction_IsResource(construct awscdk.IConstruct) *bool

Check whether the given construct is a Resource. Experimental.

func PythonFunction_MetricAll 

func PythonFunction_MetricAll(metricName *string, props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Return the given named metric for this Lambda. Experimental.

func PythonFunction_MetricAllConcurrentExecutions 

func PythonFunction_MetricAllConcurrentExecutions(props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Metric for the number of concurrent executions across all Lambdas. Experimental.

func PythonFunction_MetricAllDuration 

func PythonFunction_MetricAllDuration(props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Metric for the Duration executing all Lambdas. Experimental.

func PythonFunction_MetricAllErrors 

func PythonFunction_MetricAllErrors(props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Metric for the number of Errors executing all Lambdas. Experimental.

func PythonFunction_MetricAllInvocations 

func PythonFunction_MetricAllInvocations(props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Metric for the number of invocations of all Lambdas. Experimental.

func PythonFunction_MetricAllThrottles 

func PythonFunction_MetricAllThrottles(props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Metric for the number of throttled invocations of all Lambdas. Experimental.

func PythonFunction_MetricAllUnreservedConcurrentExecutions 

func PythonFunction_MetricAllUnreservedConcurrentExecutions(props *awscloudwatch.MetricOptions) awscloudwatch.Metric

Metric for the number of unreserved concurrent executions across all Lambdas. Experimental.

func PythonLayerVersion_FromLayerVersionArn 

func PythonLayerVersion_FromLayerVersionArn(scope constructs.Construct, id *string, layerVersionArn *string) awslambda.ILayerVersion

Imports a layer version by ARN.

Assumes it is compatible with all Lambda runtimes. Experimental.

func PythonLayerVersion_FromLayerVersionAttributes 

func PythonLayerVersion_FromLayerVersionAttributes(scope constructs.Construct, id *string, attrs *awslambda.LayerVersionAttributes) awslambda.ILayerVersion

Imports a Layer that has been defined externally. Experimental.

func PythonLayerVersion_IsConstruct 

func PythonLayerVersion_IsConstruct(x interface{}) *bool

Return whether the given object is a Construct. Experimental.

func PythonLayerVersion_IsResource 

func PythonLayerVersion_IsResource(construct awscdk.IConstruct) *bool

Check whether the given construct is a Resource. Experimental.

Types

type BundlingOptions 

type BundlingOptions struct {
	// Specify a custom hash for this asset.
	//
	// If `assetHashType` is set it must
	// be set to `AssetHashType.CUSTOM`. For consistency, this custom hash will
	// be SHA256 hashed and encoded as hex. The resulting hash will be the asset
	// hash.
	//
	// NOTE: the hash is used in order to identify a specific revision of the asset, and
	// used for optimizing and caching deployment activities related to this asset such as
	// packaging, uploading to Amazon S3, etc. If you chose to customize the hash, you will
	// need to make sure it is updated every time the asset changes, or otherwise it is
	// possible that some deployments will not be invalidated.
	// Experimental.
	AssetHash *string `field:"optional" json:"assetHash" yaml:"assetHash"`
	// Determines how asset hash is calculated. Assets will get rebuild and uploaded only if their hash has changed.
	//
	// If asset hash is set to `SOURCE` (default), then only changes to the source
	// directory will cause the asset to rebuild. This means, for example, that in
	// order to pick up a new dependency version, a change must be made to the
	// source tree. Ideally, this can be implemented by including a dependency
	// lockfile in your source tree or using fixed dependencies.
	//
	// If the asset hash is set to `OUTPUT`, the hash is calculated after
	// bundling. This means that any change in the output will cause the asset to
	// be invalidated and uploaded. Bear in mind that `pip` adds timestamps to
	// dependencies it installs, which implies that in this mode Python bundles
	// will _always_ get rebuild and uploaded. Normally this is an anti-pattern
	// since build.
	// Experimental.
	AssetHashType awscdk.AssetHashType `field:"optional" json:"assetHashType" yaml:"assetHashType"`
	// Optional build arguments to pass to the default container.
	//
	// This can be used to customize
	// the index URLs used for installing dependencies.
	// This is not used if a custom image is provided.
	// Experimental.
	BuildArgs *map[string]*string `field:"optional" json:"buildArgs" yaml:"buildArgs"`
	// Environment variables defined when bundling runs.
	// Experimental.
	Environment *map[string]*string `field:"optional" json:"environment" yaml:"environment"`
	// Docker image to use for bundling.
	//
	// If no options are provided, the default bundling image
	// will be used. Dependencies will be installed using the default packaging commands
	// and copied over from into the Lambda asset.
	// Experimental.
	Image awscdk.DockerImage `field:"optional" json:"image" yaml:"image"`
	// Output path suffix: the suffix for the directory into which the bundled output is written.
	// Experimental.
	OutputPathSuffix *string `field:"optional" json:"outputPathSuffix" yaml:"outputPathSuffix"`
}

Options for bundling.

Example: 

entry := "/path/to/function"
image := awscdk.DockerImage.fromBuild(entry)

lambda.NewPythonFunction(this, jsii.String("function"), &pythonFunctionProps{
	entry: jsii.String(entry),
	runtime: awscdk.Runtime_PYTHON_3_8(),
	bundling: &bundlingOptions{
		buildArgs: map[string]*string{
			"PIP_INDEX_URL": jsii.String("https://your.index.url/simple/"),
			"PIP_EXTRA_INDEX_URL": jsii.String("https://your.extra-index.url/simple/"),
		},
	},
})

Experimental.

type PythonFunction 

type PythonFunction interface {
	awslambda.Function
	// The architecture of this Lambda Function (this is an optional attribute and defaults to X86_64).
	// Experimental.
	Architecture() awslambda.Architecture
	// Whether the addPermission() call adds any permissions.
	//
	// True for new Lambdas, false for version $LATEST and imported Lambdas
	// from different accounts.
	// Experimental.
	CanCreatePermissions() *bool
	// Access the Connections object.
	//
	// Will fail if not a VPC-enabled Lambda Function.
	// Experimental.
	Connections() awsec2.Connections
	// Returns a `lambda.Version` which represents the current version of this Lambda function. A new version will be created every time the function's configuration changes.
	//
	// You can specify options for this version using the `currentVersionOptions`
	// prop when initializing the `lambda.Function`.
	// Experimental.
	CurrentVersion() awslambda.Version
	// The DLQ (as queue) associated with this Lambda Function (this is an optional attribute).
	// Experimental.
	DeadLetterQueue() awssqs.IQueue
	// The DLQ (as topic) associated with this Lambda Function (this is an optional attribute).
	// Experimental.
	DeadLetterTopic() awssns.ITopic
	// The environment this resource belongs to.
	//
	// For resources that are created and managed by the CDK
	// (generally, those created by creating new class instances like Role, Bucket, etc.),
	// this is always the same as the environment of the stack they belong to;
	// however, for imported resources
	// (those obtained from static methods like fromRoleArn, fromBucketName, etc.),
	// that might be different than the stack they were imported into.
	// Experimental.
	Env() *awscdk.ResourceEnvironment
	// ARN of this function.
	// Experimental.
	FunctionArn() *string
	// Name of this function.
	// Experimental.
	FunctionName() *string
	// The principal this Lambda Function is running as.
	// Experimental.
	GrantPrincipal() awsiam.IPrincipal
	// Whether or not this Lambda function was bound to a VPC.
	//
	// If this is is `false`, trying to access the `connections` object will fail.
	// Experimental.
	IsBoundToVpc() *bool
	// The `$LATEST` version of this function.
	//
	// Note that this is reference to a non-specific AWS Lambda version, which
	// means the function this version refers to can return different results in
	// different invocations.
	//
	// To obtain a reference to an explicit version which references the current
	// function configuration, use `lambdaFunction.currentVersion` instead.
	// Experimental.
	LatestVersion() awslambda.IVersion
	// The LogGroup where the Lambda function's logs are made available.
	//
	// If either `logRetention` is set or this property is called, a CloudFormation custom resource is added to the stack that
	// pre-creates the log group as part of the stack deployment, if it already doesn't exist, and sets the correct log retention
	// period (never expire, by default).
	//
	// Further, if the log group already exists and the `logRetention` is not set, the custom resource will reset the log retention
	// to never expire even if it was configured with a different value.
	// Experimental.
	LogGroup() awslogs.ILogGroup
	// The construct tree node associated with this construct.
	// Experimental.
	Node() awscdk.ConstructNode
	// The construct node where permissions are attached.
	// Experimental.
	PermissionsNode() awscdk.ConstructNode
	// Returns a string-encoded token that resolves to the physical name that should be passed to the CloudFormation resource.
	//
	// This value will resolve to one of the following:
	// - a concrete value (e.g. `"my-awesome-bucket"`)
	// - `undefined`, when a name should be generated by CloudFormation
	// - a concrete name generated automatically during synthesis, in
	//    cross-environment scenarios.
	// Experimental.
	PhysicalName() *string
	// The ARN(s) to put into the resource field of the generated IAM policy for grantInvoke().
	// Experimental.
	ResourceArnsForGrantInvoke() *[]*string
	// Execution role associated with this function.
	// Experimental.
	Role() awsiam.IRole
	// The runtime configured for this lambda.
	// Experimental.
	Runtime() awslambda.Runtime
	// The stack in which this resource is defined.
	// Experimental.
	Stack() awscdk.Stack
	// The timeout configured for this lambda.
	// Experimental.
	Timeout() awscdk.Duration
	// Defines an alias for this function.
	//
	// The alias will automatically be updated to point to the latest version of
	// the function as it is being updated during a deployment.
	//
	// “`ts
	// declare const fn: lambda.Function;
	//
	// fn.addAlias('Live');
	//
	// // Is equivalent to
	//
	// new lambda.Alias(this, 'AliasLive', {
	//    aliasName: 'Live',
	//    version: fn.currentVersion,
	// });.
	// Experimental.
	AddAlias(aliasName *string, options *awslambda.AliasOptions) awslambda.Alias
	// Adds an environment variable to this Lambda function.
	//
	// If this is a ref to a Lambda function, this operation results in a no-op.
	// Experimental.
	AddEnvironment(key *string, value *string, options *awslambda.EnvironmentOptions) awslambda.Function
	// Adds an event source to this function.
	//
	// Event sources are implemented in the @aws-cdk/aws-lambda-event-sources module.
	//
	// The following example adds an SQS Queue as an event source:
	// “`
	// import { SqsEventSource } from '@aws-cdk/aws-lambda-event-sources';
	// myFunction.addEventSource(new SqsEventSource(myQueue));
	// “`.
	// Experimental.
	AddEventSource(source awslambda.IEventSource)
	// Adds an event source that maps to this AWS Lambda function.
	// Experimental.
	AddEventSourceMapping(id *string, options *awslambda.EventSourceMappingOptions) awslambda.EventSourceMapping
	// Adds a url to this lambda function.
	// Experimental.
	AddFunctionUrl(options *awslambda.FunctionUrlOptions) awslambda.FunctionUrl
	// Adds one or more Lambda Layers to this Lambda function.
	// Experimental.
	AddLayers(layers ...awslambda.ILayerVersion)
	// Adds a permission to the Lambda resource policy.
	// See: Permission for details.
	//
	// Experimental.
	AddPermission(id *string, permission *awslambda.Permission)
	// Adds a statement to the IAM role assumed by the instance.
	// Experimental.
	AddToRolePolicy(statement awsiam.PolicyStatement)
	// Add a new version for this Lambda.
	//
	// If you want to deploy through CloudFormation and use aliases, you need to
	// add a new version (with a new name) to your Lambda every time you want to
	// deploy an update. An alias can then refer to the newly created Version.
	//
	// All versions should have distinct names, and you should not delete versions
	// as long as your Alias needs to refer to them.
	//
	// Returns: A new Version object.
	// Deprecated: This method will create an AWS::Lambda::Version resource which
	// snapshots the AWS Lambda function *at the time of its creation* and it
	// won't get updated when the function changes. Instead, use
	// `this.currentVersion` to obtain a reference to a version resource that gets
	// automatically recreated when the function configuration (or code) changes.
	AddVersion(name *string, codeSha256 *string, description *string, provisionedExecutions *float64, asyncInvokeConfig *awslambda.EventInvokeConfigOptions) awslambda.Version
	// Apply the given removal policy to this resource.
	//
	// The Removal Policy controls what happens to this resource when it stops
	// being managed by CloudFormation, either because you've removed it from the
	// CDK application or because you've made a change that requires the resource
	// to be replaced.
	//
	// The resource can be deleted (`RemovalPolicy.DESTROY`), or left in your AWS
	// account for data recovery and cleanup later (`RemovalPolicy.RETAIN`).
	// Experimental.
	ApplyRemovalPolicy(policy awscdk.RemovalPolicy)
	// Configures options for asynchronous invocation.
	// Experimental.
	ConfigureAsyncInvoke(options *awslambda.EventInvokeConfigOptions)
	// A warning will be added to functions under the following conditions: - permissions that include `lambda:InvokeFunction` are added to the unqualified function.
	//
	// - function.currentVersion is invoked before or after the permission is created.
	//
	// This applies only to permissions on Lambda functions, not versions or aliases.
	// This function is overridden as a noOp for QualifiedFunctionBase.
	// Experimental.
	ConsiderWarningOnInvokeFunctionPermissions(scope awscdk.Construct, action *string)
	// Experimental.
	GeneratePhysicalName() *string
	// Returns an environment-sensitive token that should be used for the resource's "ARN" attribute (e.g. `bucket.bucketArn`).
	//
	// Normally, this token will resolve to `arnAttr`, but if the resource is
	// referenced across environments, `arnComponents` will be used to synthesize
	// a concrete ARN with the resource's physical name. Make sure to reference
	// `this.physicalName` in `arnComponents`.
	// Experimental.
	GetResourceArnAttribute(arnAttr *string, arnComponents *awscdk.ArnComponents) *string
	// Returns an environment-sensitive token that should be used for the resource's "name" attribute (e.g. `bucket.bucketName`).
	//
	// Normally, this token will resolve to `nameAttr`, but if the resource is
	// referenced across environments, it will be resolved to `this.physicalName`,
	// which will be a concrete name.
	// Experimental.
	GetResourceNameAttribute(nameAttr *string) *string
	// Grant the given identity permissions to invoke this Lambda.
	// Experimental.
	GrantInvoke(grantee awsiam.IGrantable) awsiam.Grant
	// Grant the given identity permissions to invoke this Lambda Function URL.
	// Experimental.
	GrantInvokeUrl(grantee awsiam.IGrantable) awsiam.Grant
	// Return the given named metric for this Function.
	// Experimental.
	Metric(metricName *string, props *awscloudwatch.MetricOptions) awscloudwatch.Metric
	// How long execution of this Lambda takes.
	//
	// Average over 5 minutes.
	// Experimental.
	MetricDuration(props *awscloudwatch.MetricOptions) awscloudwatch.Metric
	// How many invocations of this Lambda fail.
	//
	// Sum over 5 minutes.
	// Experimental.
	MetricErrors(props *awscloudwatch.MetricOptions) awscloudwatch.Metric
	// How often this Lambda is invoked.
	//
	// Sum over 5 minutes.
	// Experimental.
	MetricInvocations(props *awscloudwatch.MetricOptions) awscloudwatch.Metric
	// How often this Lambda is throttled.
	//
	// Sum over 5 minutes.
	// Experimental.
	MetricThrottles(props *awscloudwatch.MetricOptions) awscloudwatch.Metric
	// Perform final modifications before synthesis.
	//
	// This method can be implemented by derived constructs in order to perform
	// final changes before synthesis. prepare() will be called after child
	// constructs have been prepared.
	//
	// This is an advanced framework feature. Only use this if you
	// understand the implications.
	// Experimental.
	OnPrepare()
	// Allows this construct to emit artifacts into the cloud assembly during synthesis.
	//
	// This method is usually implemented by framework-level constructs such as `Stack` and `Asset`
	// as they participate in synthesizing the cloud assembly.
	// Experimental.
	OnSynthesize(session constructs.ISynthesisSession)
	// Validate the current construct.
	//
	// This method can be implemented by derived constructs in order to perform
	// validation logic. It is called on all constructs before synthesis.
	//
	// Returns: An array of validation error messages, or an empty array if the construct is valid.
	// Experimental.
	OnValidate() *[]*string
	// Perform final modifications before synthesis.
	//
	// This method can be implemented by derived constructs in order to perform
	// final changes before synthesis. prepare() will be called after child
	// constructs have been prepared.
	//
	// This is an advanced framework feature. Only use this if you
	// understand the implications.
	// Experimental.
	Prepare()
	// Allows this construct to emit artifacts into the cloud assembly during synthesis.
	//
	// This method is usually implemented by framework-level constructs such as `Stack` and `Asset`
	// as they participate in synthesizing the cloud assembly.
	// Experimental.
	Synthesize(session awscdk.ISynthesisSession)
	// Returns a string representation of this construct.
	// Experimental.
	ToString() *string
	// Validate the current construct.
	//
	// This method can be implemented by derived constructs in order to perform
	// validation logic. It is called on all constructs before synthesis.
	//
	// Returns: An array of validation error messages, or an empty array if the construct is valid.
	// Experimental.
	Validate() *[]*string
	// Experimental.
	WarnInvokeFunctionPermissions(scope awscdk.Construct)
}

A Python Lambda function.

Example: 

entry := "/path/to/function"
image := awscdk.DockerImage.fromBuild(entry)

lambda.NewPythonFunction(this, jsii.String("function"), &pythonFunctionProps{
	entry: jsii.String(entry),
	runtime: awscdk.Runtime_PYTHON_3_8(),
	bundling: &bundlingOptions{
		buildArgs: map[string]*string{
			"PIP_INDEX_URL": jsii.String("https://your.index.url/simple/"),
			"PIP_EXTRA_INDEX_URL": jsii.String("https://your.extra-index.url/simple/"),
		},
	},
})

Experimental.

func NewPythonFunction 

func NewPythonFunction(scope awscdk.Construct, id *string, props *PythonFunctionProps) PythonFunction

Experimental.

type PythonFunctionProps 

type PythonFunctionProps struct {
	// The maximum age of a request that Lambda sends to a function for processing.
	//
	// Minimum: 60 seconds
	// Maximum: 6 hours.
	// Experimental.
	MaxEventAge awscdk.Duration `field:"optional" json:"maxEventAge" yaml:"maxEventAge"`
	// The destination for failed invocations.
	// Experimental.
	OnFailure awslambda.IDestination `field:"optional" json:"onFailure" yaml:"onFailure"`
	// The destination for successful invocations.
	// Experimental.
	OnSuccess awslambda.IDestination `field:"optional" json:"onSuccess" yaml:"onSuccess"`
	// The maximum number of times to retry when the function returns an error.
	//
	// Minimum: 0
	// Maximum: 2.
	// Experimental.
	RetryAttempts *float64 `field:"optional" json:"retryAttempts" yaml:"retryAttempts"`
	// Whether to allow the Lambda to send all network traffic.
	//
	// If set to false, you must individually add traffic rules to allow the
	// Lambda to connect to network targets.
	// Experimental.
	AllowAllOutbound *bool `field:"optional" json:"allowAllOutbound" yaml:"allowAllOutbound"`
	// Lambda Functions in a public subnet can NOT access the internet.
	//
	// Use this property to acknowledge this limitation and still place the function in a public subnet.
	// See: https://stackoverflow.com/questions/52992085/why-cant-an-aws-lambda-function-inside-a-public-subnet-in-a-vpc-connect-to-the/52994841#52994841
	//
	// Experimental.
	AllowPublicSubnet *bool `field:"optional" json:"allowPublicSubnet" yaml:"allowPublicSubnet"`
	// The system architectures compatible with this lambda function.
	// Experimental.
	Architecture awslambda.Architecture `field:"optional" json:"architecture" yaml:"architecture"`
	// DEPRECATED.
	// Deprecated: use `architecture`.
	Architectures *[]awslambda.Architecture `field:"optional" json:"architectures" yaml:"architectures"`
	// Code signing config associated with this function.
	// Experimental.
	CodeSigningConfig awslambda.ICodeSigningConfig `field:"optional" json:"codeSigningConfig" yaml:"codeSigningConfig"`
	// Options for the `lambda.Version` resource automatically created by the `fn.currentVersion` method.
	// Experimental.
	CurrentVersionOptions *awslambda.VersionOptions `field:"optional" json:"currentVersionOptions" yaml:"currentVersionOptions"`
	// The SQS queue to use if DLQ is enabled.
	//
	// If SNS topic is desired, specify `deadLetterTopic` property instead.
	// Experimental.
	DeadLetterQueue awssqs.IQueue `field:"optional" json:"deadLetterQueue" yaml:"deadLetterQueue"`
	// Enabled DLQ.
	//
	// If `deadLetterQueue` is undefined,
	// an SQS queue with default options will be defined for your Function.
	// Experimental.
	DeadLetterQueueEnabled *bool `field:"optional" json:"deadLetterQueueEnabled" yaml:"deadLetterQueueEnabled"`
	// The SNS topic to use as a DLQ.
	//
	// Note that if `deadLetterQueueEnabled` is set to `true`, an SQS queue will be created
	// rather than an SNS topic. Using an SNS topic as a DLQ requires this property to be set explicitly.
	// Experimental.
	DeadLetterTopic awssns.ITopic `field:"optional" json:"deadLetterTopic" yaml:"deadLetterTopic"`
	// A description of the function.
	// Experimental.
	Description *string `field:"optional" json:"description" yaml:"description"`
	// Key-value pairs that Lambda caches and makes available for your Lambda functions.
	//
	// Use environment variables to apply configuration changes, such
	// as test and production environment configurations, without changing your
	// Lambda function source code.
	// Experimental.
	Environment *map[string]*string `field:"optional" json:"environment" yaml:"environment"`
	// The AWS KMS key that's used to encrypt your function's environment variables.
	// Experimental.
	EnvironmentEncryption awskms.IKey `field:"optional" json:"environmentEncryption" yaml:"environmentEncryption"`
	// The size of the function’s /tmp directory in MiB.
	// Experimental.
	EphemeralStorageSize awscdk.Size `field:"optional" json:"ephemeralStorageSize" yaml:"ephemeralStorageSize"`
	// Event sources for this function.
	//
	// You can also add event sources using `addEventSource`.
	// Experimental.
	Events *[]awslambda.IEventSource `field:"optional" json:"events" yaml:"events"`
	// The filesystem configuration for the lambda function.
	// Experimental.
	Filesystem awslambda.FileSystem `field:"optional" json:"filesystem" yaml:"filesystem"`
	// A name for the function.
	// Experimental.
	FunctionName *string `field:"optional" json:"functionName" yaml:"functionName"`
	// Initial policy statements to add to the created Lambda Role.
	//
	// You can call `addToRolePolicy` to the created lambda to add statements post creation.
	// Experimental.
	InitialPolicy *[]awsiam.PolicyStatement `field:"optional" json:"initialPolicy" yaml:"initialPolicy"`
	// Specify the version of CloudWatch Lambda insights to use for monitoring.
	// See: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Lambda-Insights-Getting-Started-docker.html
	//
	// Experimental.
	InsightsVersion awslambda.LambdaInsightsVersion `field:"optional" json:"insightsVersion" yaml:"insightsVersion"`
	// A list of layers to add to the function's execution environment.
	//
	// You can configure your Lambda function to pull in
	// additional code during initialization in the form of layers. Layers are packages of libraries or other dependencies
	// that can be used by multiple functions.
	// Experimental.
	Layers *[]awslambda.ILayerVersion `field:"optional" json:"layers" yaml:"layers"`
	// The number of days log events are kept in CloudWatch Logs.
	//
	// When updating
	// this property, unsetting it doesn't remove the log retention policy. To
	// remove the retention policy, set the value to `INFINITE`.
	// Experimental.
	LogRetention awslogs.RetentionDays `field:"optional" json:"logRetention" yaml:"logRetention"`
	// When log retention is specified, a custom resource attempts to create the CloudWatch log group.
	//
	// These options control the retry policy when interacting with CloudWatch APIs.
	// Experimental.
	LogRetentionRetryOptions *awslambda.LogRetentionRetryOptions `field:"optional" json:"logRetentionRetryOptions" yaml:"logRetentionRetryOptions"`
	// The IAM role for the Lambda function associated with the custom resource that sets the retention policy.
	// Experimental.
	LogRetentionRole awsiam.IRole `field:"optional" json:"logRetentionRole" yaml:"logRetentionRole"`
	// The amount of memory, in MB, that is allocated to your Lambda function.
	//
	// Lambda uses this value to proportionally allocate the amount of CPU
	// power. For more information, see Resource Model in the AWS Lambda
	// Developer Guide.
	// Experimental.
	MemorySize *float64 `field:"optional" json:"memorySize" yaml:"memorySize"`
	// Enable profiling.
	// See: https://docs.aws.amazon.com/codeguru/latest/profiler-ug/setting-up-lambda.html
	//
	// Experimental.
	Profiling *bool `field:"optional" json:"profiling" yaml:"profiling"`
	// Profiling Group.
	// See: https://docs.aws.amazon.com/codeguru/latest/profiler-ug/setting-up-lambda.html
	//
	// Experimental.
	ProfilingGroup awscodeguruprofiler.IProfilingGroup `field:"optional" json:"profilingGroup" yaml:"profilingGroup"`
	// The maximum of concurrent executions you want to reserve for the function.
	// See: https://docs.aws.amazon.com/lambda/latest/dg/concurrent-executions.html
	//
	// Experimental.
	ReservedConcurrentExecutions *float64 `field:"optional" json:"reservedConcurrentExecutions" yaml:"reservedConcurrentExecutions"`
	// Lambda execution role.
	//
	// This is the role that will be assumed by the function upon execution.
	// It controls the permissions that the function will have. The Role must
	// be assumable by the 'lambda.amazonaws.com' service principal.
	//
	// The default Role automatically has permissions granted for Lambda execution. If you
	// provide a Role, you must add the relevant AWS managed policies yourself.
	//
	// The relevant managed policies are "service-role/AWSLambdaBasicExecutionRole" and
	// "service-role/AWSLambdaVPCAccessExecutionRole".
	// Experimental.
	Role awsiam.IRole `field:"optional" json:"role" yaml:"role"`
	// What security group to associate with the Lambda's network interfaces. This property is being deprecated, consider using securityGroups instead.
	//
	// Only used if 'vpc' is supplied.
	//
	// Use securityGroups property instead.
	// Function constructor will throw an error if both are specified.
	// Deprecated: - This property is deprecated, use securityGroups instead.
	SecurityGroup awsec2.ISecurityGroup `field:"optional" json:"securityGroup" yaml:"securityGroup"`
	// The list of security groups to associate with the Lambda's network interfaces.
	//
	// Only used if 'vpc' is supplied.
	// Experimental.
	SecurityGroups *[]awsec2.ISecurityGroup `field:"optional" json:"securityGroups" yaml:"securityGroups"`
	// The function execution time (in seconds) after which Lambda terminates the function.
	//
	// Because the execution time affects cost, set this value
	// based on the function's expected execution time.
	// Experimental.
	Timeout awscdk.Duration `field:"optional" json:"timeout" yaml:"timeout"`
	// Enable AWS X-Ray Tracing for Lambda Function.
	// Experimental.
	Tracing awslambda.Tracing `field:"optional" json:"tracing" yaml:"tracing"`
	// VPC network to place Lambda network interfaces.
	//
	// Specify this if the Lambda function needs to access resources in a VPC.
	// Experimental.
	Vpc awsec2.IVpc `field:"optional" json:"vpc" yaml:"vpc"`
	// Where to place the network interfaces within the VPC.
	//
	// Only used if 'vpc' is supplied. Note: internet access for Lambdas
	// requires a NAT gateway, so picking Public subnets is not allowed.
	// Experimental.
	VpcSubnets *awsec2.SubnetSelection `field:"optional" json:"vpcSubnets" yaml:"vpcSubnets"`
	// Path to the source of the function or the location for dependencies.
	// Experimental.
	Entry *string `field:"required" json:"entry" yaml:"entry"`
	// The runtime environment.
	//
	// Only runtimes of the Python family are
	// supported.
	// Experimental.
	Runtime awslambda.Runtime `field:"required" json:"runtime" yaml:"runtime"`
	// Bundling options to use for this function.
	//
	// Use this to specify custom bundling options like
	// the bundling Docker image, asset hash type, custom hash, architecture, etc.
	// Experimental.
	Bundling *BundlingOptions `field:"optional" json:"bundling" yaml:"bundling"`
	// The name of the exported handler in the index file.
	// Experimental.
	Handler *string `field:"optional" json:"handler" yaml:"handler"`
	// The path (relative to entry) to the index file containing the exported handler.
	// Experimental.
	Index *string `field:"optional" json:"index" yaml:"index"`
}

Properties for a PythonFunction.

Example: 

entry := "/path/to/function"
image := awscdk.DockerImage.fromBuild(entry)

lambda.NewPythonFunction(this, jsii.String("function"), &pythonFunctionProps{
	entry: jsii.String(entry),
	runtime: awscdk.Runtime_PYTHON_3_8(),
	bundling: &bundlingOptions{
		buildArgs: map[string]*string{
			"PIP_INDEX_URL": jsii.String("https://your.index.url/simple/"),
			"PIP_EXTRA_INDEX_URL": jsii.String("https://your.extra-index.url/simple/"),
		},
	},
})

Experimental.

type PythonLayerVersion 

type PythonLayerVersion interface {
	awslambda.LayerVersion
	// The runtimes compatible with this Layer.
	// Experimental.
	CompatibleRuntimes() *[]awslambda.Runtime
	// The environment this resource belongs to.
	//
	// For resources that are created and managed by the CDK
	// (generally, those created by creating new class instances like Role, Bucket, etc.),
	// this is always the same as the environment of the stack they belong to;
	// however, for imported resources
	// (those obtained from static methods like fromRoleArn, fromBucketName, etc.),
	// that might be different than the stack they were imported into.
	// Experimental.
	Env() *awscdk.ResourceEnvironment
	// The ARN of the Lambda Layer version that this Layer defines.
	// Experimental.
	LayerVersionArn() *string
	// The construct tree node associated with this construct.
	// Experimental.
	Node() awscdk.ConstructNode
	// Returns a string-encoded token that resolves to the physical name that should be passed to the CloudFormation resource.
	//
	// This value will resolve to one of the following:
	// - a concrete value (e.g. `"my-awesome-bucket"`)
	// - `undefined`, when a name should be generated by CloudFormation
	// - a concrete name generated automatically during synthesis, in
	//    cross-environment scenarios.
	// Experimental.
	PhysicalName() *string
	// The stack in which this resource is defined.
	// Experimental.
	Stack() awscdk.Stack
	// Add permission for this layer version to specific entities.
	//
	// Usage within
	// the same account where the layer is defined is always allowed and does not
	// require calling this method. Note that the principal that creates the
	// Lambda function using the layer (for example, a CloudFormation changeset
	// execution role) also needs to have the “lambda:GetLayerVersion“
	// permission on the layer version.
	// Experimental.
	AddPermission(id *string, permission *awslambda.LayerVersionPermission)
	// Apply the given removal policy to this resource.
	//
	// The Removal Policy controls what happens to this resource when it stops
	// being managed by CloudFormation, either because you've removed it from the
	// CDK application or because you've made a change that requires the resource
	// to be replaced.
	//
	// The resource can be deleted (`RemovalPolicy.DESTROY`), or left in your AWS
	// account for data recovery and cleanup later (`RemovalPolicy.RETAIN`).
	// Experimental.
	ApplyRemovalPolicy(policy awscdk.RemovalPolicy)
	// Experimental.
	GeneratePhysicalName() *string
	// Returns an environment-sensitive token that should be used for the resource's "ARN" attribute (e.g. `bucket.bucketArn`).
	//
	// Normally, this token will resolve to `arnAttr`, but if the resource is
	// referenced across environments, `arnComponents` will be used to synthesize
	// a concrete ARN with the resource's physical name. Make sure to reference
	// `this.physicalName` in `arnComponents`.
	// Experimental.
	GetResourceArnAttribute(arnAttr *string, arnComponents *awscdk.ArnComponents) *string
	// Returns an environment-sensitive token that should be used for the resource's "name" attribute (e.g. `bucket.bucketName`).
	//
	// Normally, this token will resolve to `nameAttr`, but if the resource is
	// referenced across environments, it will be resolved to `this.physicalName`,
	// which will be a concrete name.
	// Experimental.
	GetResourceNameAttribute(nameAttr *string) *string
	// Perform final modifications before synthesis.
	//
	// This method can be implemented by derived constructs in order to perform
	// final changes before synthesis. prepare() will be called after child
	// constructs have been prepared.
	//
	// This is an advanced framework feature. Only use this if you
	// understand the implications.
	// Experimental.
	OnPrepare()
	// Allows this construct to emit artifacts into the cloud assembly during synthesis.
	//
	// This method is usually implemented by framework-level constructs such as `Stack` and `Asset`
	// as they participate in synthesizing the cloud assembly.
	// Experimental.
	OnSynthesize(session constructs.ISynthesisSession)
	// Validate the current construct.
	//
	// This method can be implemented by derived constructs in order to perform
	// validation logic. It is called on all constructs before synthesis.
	//
	// Returns: An array of validation error messages, or an empty array if the construct is valid.
	// Experimental.
	OnValidate() *[]*string
	// Perform final modifications before synthesis.
	//
	// This method can be implemented by derived constructs in order to perform
	// final changes before synthesis. prepare() will be called after child
	// constructs have been prepared.
	//
	// This is an advanced framework feature. Only use this if you
	// understand the implications.
	// Experimental.
	Prepare()
	// Allows this construct to emit artifacts into the cloud assembly during synthesis.
	//
	// This method is usually implemented by framework-level constructs such as `Stack` and `Asset`
	// as they participate in synthesizing the cloud assembly.
	// Experimental.
	Synthesize(session awscdk.ISynthesisSession)
	// Returns a string representation of this construct.
	// Experimental.
	ToString() *string
	// Validate the current construct.
	//
	// This method can be implemented by derived constructs in order to perform
	// validation logic. It is called on all constructs before synthesis.
	//
	// Returns: An array of validation error messages, or an empty array if the construct is valid.
	// Experimental.
	Validate() *[]*string
}

A lambda layer version.

Example: 

lambda.NewPythonLayerVersion(this, jsii.String("MyLayer"), &pythonLayerVersionProps{
	entry: jsii.String("/path/to/my/layer"),
})

Experimental.

func NewPythonLayerVersion 

func NewPythonLayerVersion(scope awscdk.Construct, id *string, props *PythonLayerVersionProps) PythonLayerVersion

Experimental.

type PythonLayerVersionProps 

type PythonLayerVersionProps struct {
	// The description the this Lambda Layer.
	// Experimental.
	Description *string `field:"optional" json:"description" yaml:"description"`
	// The name of the layer.
	// Experimental.
	LayerVersionName *string `field:"optional" json:"layerVersionName" yaml:"layerVersionName"`
	// The SPDX licence identifier or URL to the license file for this layer.
	// Experimental.
	License *string `field:"optional" json:"license" yaml:"license"`
	// Whether to retain this version of the layer when a new version is added or when the stack is deleted.
	// Experimental.
	RemovalPolicy awscdk.RemovalPolicy `field:"optional" json:"removalPolicy" yaml:"removalPolicy"`
	// The path to the root directory of the lambda layer.
	// Experimental.
	Entry *string `field:"required" json:"entry" yaml:"entry"`
	// Bundling options to use for this function.
	//
	// Use this to specify custom bundling options like
	// the bundling Docker image, asset hash type, custom hash, architecture, etc.
	// Experimental.
	Bundling *BundlingOptions `field:"optional" json:"bundling" yaml:"bundling"`
	// The system architectures compatible with this layer.
	// Experimental.
	CompatibleArchitectures *[]awslambda.Architecture `field:"optional" json:"compatibleArchitectures" yaml:"compatibleArchitectures"`
	// The runtimes compatible with the python layer.
	// Experimental.
	CompatibleRuntimes *[]awslambda.Runtime `field:"optional" json:"compatibleRuntimes" yaml:"compatibleRuntimes"`
}

Properties for PythonLayerVersion.

Example: 

lambda.NewPythonLayerVersion(this, jsii.String("MyLayer"), &pythonLayerVersionProps{
	entry: jsii.String("/path/to/my/layer"),
})

Experimental.

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