An example setup for debugging Serverless Framework Lambda functions in VSCode

launch.json

{
  "configurations": [
    {
      "preLaunchTask": "add_requirements",
      "type": "aws-sam",
      "request": "direct-invoke",
      "name": "whatever",
      "invokeTarget": {
        "target": "code",
        "lambdaHandler": "path.to.your.handler.handler_name",
        "projectRoot": "."
      },
      "lambda": {
        "runtime": "python3.8",
        "payload": {},
        "environmentVariables": {
          "EXAMPLE_ENV_VAR": "blahblah"
        }
      },
      "aws": {
        "credentials": "profile:my_profile"
      }
    }
  ]
}