[AWS] 파이썬 boto3로 전체 EC2 리스트 불러오기

def get_instance_name():
    try:
        response = ec2.describe_instances()
        for reservation in response['Reservations']:
            for instance in reservation['Instances']:
               print("Instance: " + instance['InstanceId'])
                for securityGroup in instance['SecurityGroups']:
                    print("SG ID: {}, Name: {}".format(securityGroup['GroupId'], securityGroup['GroupName']))
   except Exception as e:
        print('get_instance_error', e)
        pass