The update_function_configuration currently returns an empty dict no matter what but certain lambda libraries (ie, Zappa) require a realistic return value... which is simply the current config after being updated.

https://github.com/localstack/localstack/blob/9cba1010dfcbf2b7672df4d7da46b7e8ab287f64/localstack/services/awslambda/lambda_api.py#L872

https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/lambda.html#Lambda.Client.update_function_configuration

There might also be some other magic enriching that result but my quick read-through looks like it's an empty dict.



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""" List functions
        ---
        operationId: 'listFunctions'
        parameters:
            - name: 'request'
              in: body
    """
    funcs = do_list_functions()
    result = {}
    result['Functions'] = funcs
    return jsonify(result)
@app.route('%s/functions/<function>' % PATH_ROOT, methods=['DELETE'])
def delete_function(function):
    """ Delete an existing function
        ---
        operationId: 'deleteFunction'
        parameters:
            - name: 'request'