云主机怎么选购

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)

    req = tencentcloud.cvm.v20170312.models.RunInstancesRequest()
    params = {
        "ImageId": "img-xxxxxx",
        "InstanceType": "S2.SMALL1",
        "InstanceChargeType": "POSTPAID_BY_HOUR",
        "InternetAccessible": {
            "InternetMaxBandwidthOut": 1,
            "PublicIpAssigned": True
        },
        "Placement": {
            "Zone": "ap-guangzhou-2"
        },
        "SystemDisk": {
            "DiskType": "CLOUD_PREMIUM",
            "DiskSize": 50
        },
        "VirtualPrivateCloud": {
            "VpcId": "vpc-xxxxxx",
            "SubnetId": "subnet-xxxxxx"
        }
    }
    req.from_json_string(params)

    resp = client.RunInstances(req)
    print(resp.to_json_string(indent=2))

if __name__ == "__main__":
    create_instance()