simple example of cdk lambda/httpapi

api_lambda_example_stack.py

from aws_cdk import (
    Stack,
    aws_apigatewayv2_alpha as api_gw,
    aws_apigatewayv2_integrations_alpha as integrations,
    CfnOutput,
    aws_lambda_python_alpha as lambda_alpha_,
    aws_lambda as _lambda

)
from constructs import Construct


class ApiLambdaExampleStack(Stack):

    def __init__(self, scope: Construct, construct_id: str, **kwargs) -> None:
        super().__init__(scope, construct_id, **kwargs)

        # The code that defines your stack goes here
        lb1 = lambda_alpha_.PythonFunction(self, "helloworld_function",
                                           entry="./lambda1",
                                           index="hello_world.py",
                                           handler="lambda_handler",
                                           runtime=_lambda.Runtime.PYTHON_3_9
                                           )

        # defines an API Gateway Http API resource backed by our "efs_lambda" function.
        api = api_gw.HttpApi(self, 'Test API Lambda',
                             default_integration=integrations.HttpLambdaIntegration(id="lb1-lambda-proxy",
                                                                                    handler=lb1))

        CfnOutput(self, 'HTTP API Url', value=api.url);