本文介绍如何使用Alibaba Cloud SDK for Python为一个专有网络类型的ECS实例绑定一个弹性公网IP（EIP）。

1. 在下载的SDK目录中，打开$aliyun-openapi-python-sdk-examples\sdk_examples\examples\eip文件夹。
2. 使用编辑器打开eip_quick_start.py文件，根据实际情况配置相关参数，保存退出。
   完整代码示例如下：

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   #encoding=utf-8 import sys import json from aliyunsdkcore.acs_exception.exceptions import ServerException, ClientException from aliyunsdkvpc.request.v20160428 import AllocateEipAddressRequest from aliyunsdkvpc.request.v20160428 import AssociateEipAddressRequest from aliyunsdkvpc.request.v20160428 import DescribeEipAddressesRequest from aliyunsdkvpc.request.v20160428 import UnassociateEipAddressRequest from aliyunsdkvpc.request.v20160428 import ModifyEipAddressAttributeRequest from aliyunsdkvpc.request.v20160428 import ReleaseEipAddressRequest from sdk_lib.exception import ExceptionHandler from sdk_lib.check_status import CheckStatus from sdk_lib.consts import * from sdk_lib.common_util import CommonUtil   """ 创建EIP->绑定EIP到ECS->查询EIP->修改EIP配置和名称->查询EIP->解绑EIP->释放EIP """ class Eip(object):     def __init__(self, client):         self.client = client       def allocate_eip_address(self, params):         """         allocate_eip_address: 申请弹性公网IP（EIP)           """         try:             request = AllocateEipAddressRequest.AllocateEipAddressRequest()             response = self.client.do_action_with_exception(request)             response_json = json.loads(response)             if CheckStatus.check_status(TIME_DEFAULT_OUT, DEFAULT_TIME,                                         self.describe_eip_status,                                         AVAILABLE, response_json["AllocationId"]):                 return response_json         except ServerException as e:             ExceptionHandler.server_exception(e)         except ClientException as e:             ExceptionHandler.client_exception(e)       def associate_eip_address(self, params):         """         associate_eip_address: 将EIP绑定到同地域的云产品实例上           """         try:             request = AssociateEipAddressRequest.AssociateEipAddressRequest()             # EIP的ID             request.set_AllocationId(params['allocation_id'])             # 要绑定的云产品实例的类型             request.set_InstanceType(params['instance_type'])             # 要绑定的实例ID             request.set_InstanceId(params['instance_id'])             response = self.client.do_action_with_exception(request)             response_json = json.loads(response)             if CheckStatus.check_status(TIME_DEFAULT_OUT, DEFAULT_TIME,                                         self.describe_eip_status,                                         InUse, params['allocation_id']):                 return response_json         except ServerException as e:             ExceptionHandler.server_exception(e)         except ClientException as e:             ExceptionHandler.client_exception(e)       def describe_eip_address(self, allocation_id):         """         describe_eip_status: 查询指定地域已创建的EIP           """         try:             request = DescribeEipAddressesRequest.DescribeEipAddressesRequest()             # EIP的ID             request.set_AllocationId(allocation_id)             response = self.client.do_action_with_exception(request)             response_json = json.loads(response)             return response_json         except ServerException as e:             ExceptionHandler.server_exception(e)         except ClientException as e:             ExceptionHandler.client_exception(e)       def describe_eip_status(self, allocation_id):         """         describe_eip_status: 查询指定地域已创建的EIP的状态           """         # EIP的ID         response = self.describe_eip_address(allocation_id)         return response["EipAddresses"]["EipAddress"][0]["Status"]         def unassociate_eip_address(self, params):         """         unassociate_eip_address: 将EIP从绑定的云资源上解绑           """         try:             request = UnassociateEipAddressRequest.UnassociateEipAddressRequest()             # EIP的ID             request.set_AllocationId(params['allocation_id'])             # 要解绑的资源类型             request.set_InstanceType(params['instance_type'])             # 要解绑的云产品的实例ID             request.set_InstanceId(params['instance_id'])             response = self.client.do_action_with_exception(request)             response_json = json.loads(response)             if CheckStatus.check_status(TIME_DEFAULT_OUT, DEFAULT_TIME,                                         self.describe_eip_status,                                         AVAILABLE, params['allocation_id']):                 return response_json             return response_json         except ServerException as e:             ExceptionHandler.server_exception(e)         except ClientException as e:             ExceptionHandler.client_exception(e)       def modify_eip_address(self, params):         """         modify_eip_address: 修改指定EIP的名称、描述信息和带宽峰值           """         try:             request = ModifyEipAddressAttributeRequest.ModifyEipAddressAttributeRequest()             # EIP的ID             request.set_AllocationId(params['allocation_id'])             # EIP的带宽峰值，单位为Mbps             request.set_Bandwidth(params['bandwidth'])             # EIP的名称             request.set_Name(params['name'])             response = self.client.do_action_with_exception(request)             response_json = json.loads(response)             return response_json         except ServerException as e:             ExceptionHandler.server_exception(e)         except ClientException as e:             ExceptionHandler.client_exception(e)       def release_eip_address(self, params):         """         release_eip_address: 释放指定的EIP           """         try:             request = ReleaseEipAddressRequest.ReleaseEipAddressRequest()             # 要释放的EIP的ID             request.set_AllocationId(params['allocation_id'])             response = self.client.do_action_with_exception(request)             response_json = json.loads(response)             return response_json         except ServerException as e:             ExceptionHandler.server_exception(e)         except ClientException as e:             ExceptionHandler.client_exception(e)   def main():       client = AcsClient(             '<your-access-key-id>',     # 您的AccessKey ID             '<your-access-key-secret>', # 您的AccessKey Secret             '<your-region-id>')         # 您的地域ID       params = {}     # 创建EIP     eip_response_json = eip.allocate_eip_address(params)     CommonUtil.log("allocate_eip_address", eip_response_json)       # 绑定EIP到ECS     params['allocation_id'] = eip_response_json["AllocationId"]     params['instance_id'] = ECS_INSTANCE_ID     params['instance_type'] = 'EcsInstance'     eip_response_json = eip.associate_eip_address(params)     CommonUtil.log("associate_eip_address", eip_response_json)       # 查询EIP     eip_response_json = eip.describe_eip_address(params['allocation_id'])     CommonUtil.log("describe_eip_address", eip_response_json)       # 修改EIP配置和名称     params['bandwidth'] = BANDWIDTH_50     params['name'] = EIP_NEW_NAME     eip_response_json = eip.modify_eip_address(params)     CommonUtil.log("modify_eip_address", eip_response_json)       # 查询EIP     eip_response_json = eip.describe_eip_address(params['allocation_id'])     CommonUtil.log("describe_eip_address", eip_response_json)       # 解绑EIP     eip_response_json = eip.unassociate_eip_address(params)     CommonUtil.log("unassociate_eip_address", eip_response_json)       # 释放EIP     eip_response_json = eip.release_eip_address(params)     CommonUtil.log("release_eip_address", eip_response_json)   if __name__ == '__main__':     sys.exit(main())

3. 进入eip_quick_start.py所在的目录，执行如下命令，将EIP绑定到ECS实例。

   1	python eip_quick_start.py