>>> import botocore.service
>>> ec2 = botocore.service.get_service('ec2')
>>> operation = ec2.get_operation('DescribeInstances')
>>> ec2.region_names
[u'us-east-1',
 u'ap-northeast-1',
 u'eu-west-1',
 u'ap-southeast-1',
 u'us-west-2',
 u'us-west-1',
 u'sa-east-1']
>>> endpoint = ec2.get_endpoint('us-east-1')
>>> response = operation.call(endpoint)
>>> response
(<Response [200]>,
 {u'requestId': u'd80ba703-71b6-4e9f-85d8-1ad5a5b5de19',
 ...}
>>> response = operation.call(endpoint, instance_ids=['i-c4bb5fba'])
>>> response
(<Response [200]>,
{u'reservationSet':
  [{u'ownerId': u'419278470775',
    u'groupSet': [{u'groupName': u'aws_mitch', u'groupId': u'sg-069e756e'}],
u'reservationId': u'r-dd7d7fa4',
u'instancesSet': [{u'productCodes': [],
u'instanceId': u'i-c4bb5fba',
u'imageId': u'ami-1b814f72',
u'keyName': u'aws_mitch',
u'clientToken': '',
u'amiLaunchIndex': 0,
u'instanceType': u't1.micro',
u'groupSet': [{u'groupName': u'aws_mitch', u'groupId': u'sg-069e756e'}],
u'monitoring': {u'state': u'disabled'},
u'dnsName': u'ec2-107-22-36-64.compute-1.amazonaws.com',
u'kernelId': u'aki-825ea7eb',
u'privateIpAddress': u'10.210.253.113',
u'virtualizationType': u'paravirtual',
u'privateDnsName': u'domU-12-31-39-09-FA-87.compute-1.internal',
u'reason': '',
u'tagSet': [{u'value': '', u'key': u'moarservers'}],
u'blockDeviceMapping': [{u'deviceName': u'/dev/sda1', u'ebs': {u'status': u'attached', u'deleteOnTermination': True, u'volumeId': u'vol-2ac62055', u'attachTime': u'2012-12-03T14:37:47.000Z'}}],
u'placement': {u'groupName': '', u'tenancy': u'default', u'availabilityZone': u'us-east-1d'},
u'instanceState': {u'code': 16, u'name': u'running'},
u'launchTime': u'2012-12-03T14:37:43.000Z',
u'architecture': u'x86_64',
u'hypervisor': u'xen',
u'rootDeviceType': u'ebs',
u'ipAddress': u'107.22.36.64',
u'rootDeviceName': u'/dev/sda1'}]}],
  u'requestId': u'61850c11-5441-4e46-9a5b-16ec5ef7a4e0'})
>>>