云主机有什么用途

import tencentcloud.common.credentials
import tencentcloud.common.profile.client_profile
import tencentcloud.common.profile.http_profile
import tencentcloud.cvm.v20170312.cvm_client

def create_instance():
    cred = tencentcloud.common.credentials.Credentials("YOUR_SECRET_ID", "YOUR_SECRET_KEY")
    httpProfile = tencentcloud.common.profile.http_profile.HttpProfile()
    httpProfile.endpoint = "cvm.tencentcloudapi.com"

    clientProfile = tencentcloud.common.profile.client_profile.ClientProfile()
    clientProfile.httpProfile = httpProfile
    client = tencentcloud.cvm.v20170312.cvm_client.CvmClient(cred, "ap-guangzhou", clientProfile)

    request = tencentcloud.cvm.v20170312.models.RunInstancesRequest()
    request.ImageId = "img-xxxxxx"
    request.InstanceType = "S2.SMALL1"
    request.InstanceChargeType = "POSTPAID_BY_HOUR"
    request.InstanceName = "MyInstance"
    request.Placement = {"Zone": "ap-guangzhou-2"}
    request.SystemDisk = {"DiskType": "CLOUD_PREMIUM", "DiskSize": 50}
    request.VirtualPrivateCloud = {"VpcId": "vpc-xxxxxx", "SubnetId": "subnet-xxxxxx"}
    request.SecurityGroupIds = ["sg-xxxxxx"]

    response = client.RunInstances(request)
    print(response.to_json_string(indent=2))

if __name__ == "__main__":
    create_instance()