aws python using boto libraries(Lambda) to deploy aws cloudformation stacks.

Requirement example. 1. There are 3 cloud formation templates and one Lambda(Python code) ,cf templates are in json foramat. 2. CF Scripts and their corresponding input json parameter files are stored in s3 bucket. Write a boto python script which will deploy CF template in a order. 4. step 1- check if the cf template exists. 5. If cf template doesnt exist, create stack 6. If template exists, then update stack with parameters from config file. 7. If cf template deployment fails/rollback, delete everything and break. 8 After deployment of first cf is complete, deploy the next template. 9. Finish with a status message , that all cf template deployment was successful.