Program for get the summary of EMR clusters and EC2 instances running in an AWS account

Amazon webservices is one among the popular cloud service providers. I am using almost all services provided by AWS. While using the cloud services, we have to be careful about the cost. We should stop or terminate all the unused services, otherwise it may result in huge money loss. This is a small python utility for getting the summary of EC2 instances and EMR clusters across all regions in an aws account. I scheduled this utility as a cron job for getting periodic emails. Similar to this code, you can create the summary utility for all the other services in AWS. This code is working fine at the time of development. The API changes may happen, you have to make the changes in the code accordingly.