Lambda function to update Volume tags with same tags from instance

updateEBSTags.py

import json
import boto3
'''
Works as Lambda function
Could pass in region from event or hardset region
'''
def main(event, context):
    #print("Received event: " + json.dumps(event))
    responseString = ''
    region_list = ['ap-southeast-2']
    for region in region_list:
      print("Region: {}".format(region))
      ec2 = boto3.resource('ec2', region_name=region)
      for instance in ec2.instances.all():
        print("Instance: {}".format(instance))
        ec2tags = instance.tags
        print("Tags: {}".format(ec2tags))
        for volume in instance.volumes.all():
          print("Volume: {}".format(volume))
          if volume.tags != ec2tags:
            print("Tags don't match, adding tags to volume")
            for t in ec2tags:
              # Skip any tags with aws: since those are reserved
              if "aws:" in t['Key']:
                print("Skipping: {} because reserved wording".format(t['Key']))
              else:
                volume.create_tags(
                  DryRun=False,
                  Tags=[
                    {
                      'Key': t['Key'],
                      'Value': t['Value']
                    },
                  ]
                )
            responseString += 'Volume {} with tags {}.\n'.format(volume.id, ec2tags)
          print("Volume Tags: {}".format(volume.tags))
          responseString += 'Volume {} already has tags {}.\n'.format(volume.id, ec2tags)

    return responseString