sym-awslambda-py

Python modules to simplify Sym lambda integrations.

Dispatch Configuration

Sym provides a standard dispatch handler that you can use to automatically route Sym messages to the right handler.

First import the dispatch function in your main handler.py file:

from sym.awslambda.dispatch import dispatch

Then in your Terraform lambda declaration, set handler.dispatch as your handler value:

resource "aws_lambda_function" "sym" {

  ...

  handler = "handler.dispatch"

  ...
}

sym_action decorator

The Sym dispatcher will delegate incoming messages to the appropriate handler based on the sym_action decorator:

from sym.awslambda.decorators import sym_action


@sym_action("approve")
def approve(approval, context):

    print("Target reason:", approval.request.meta.reason)
    ....

Message types

The messages that sym actions receive are defined as protobufs in the Sym Types repo.