To reproduce AWS Lambda environments, use Amazon's official lambda images in your tasks.

AWS Lambda-Mimicking Task - Python

jobs:
  - name: test-amazon-lambda
    plan:
    - task: get-boto3-version
      config:
        platform: linux
        image_resource:
          type: docker-image
          source:
            repository: amazon/aws-lambda-python
        params:
          PYTHONPATH: /var/runtime
        run:
          path: python3
          args:
          - -c
          - |
            import boto3
            print(f"Latest Amazon's aws-lambda-python boto3 version is {boto3.__version__}")

The task run produces the following output:

Latest Amazon's aws-lambda-python boto3 version is 1.18.55