uv-python-lambda

CDK Construct for Python Lambda Functions using uv

Goals

• ⚡️ Package and deploy Lambda Functions faster with uv's speed
• 📦 Support workspaces in a monorepo with uv workspaces

uv-python-lambda is based on aws-lambda-python-alpha with some differences:

• It only supports uv for packaging - there is no Poetry or pip support
• It supports workspaces so you can build multiple Lambda functions from different uv workspaces and have their dependencies included correctly. This is useful for, but not limited to, monorepos.

API

See API.md

Example

from uv_python_lambda import PythonFunction
from constructs import Construct

# The root path should be relative to your CDK source file
root_path = Path(__file__).parent.parent.parent


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

        fn = PythonFunction(
          self,
          "fn",
          root_dir=str(root_path),
          index="fetcher_lambda.py",
          workspace_package="fetcher",  # Use a workspace package as the top-level Lambda entry point.
          handler="handle_event",
          bundling={
              "asset_excludes": [
                  ".venv/",
                  "node_modules/",
                  "cdk/",
                  ".git/",
                  ".idea/",
                  "dist/",
              ]
          },
          timeout=Duration.seconds(30),
        )