购买云主机怎么选择镜像

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

# 设置腾讯云凭证
cred = credentials.Credential("你的SecretId", "你的SecretKey")
httpProfile = http_profile.HttpProfile()
httpProfile.endpoint = "cvm.tencentcloudapi.com"

clientProfile = client_profile.ClientProfile()
clientProfile.httpProfile = httpProfile
client = cvm_client.CvmClient(cred, "ap-guangzhou", clientProfile)

# 选择Ubuntu镜像并启动云主机实例
params = {
    "ImageId": "img-xxxxxx",  # 替换为实际的镜像ID
    "InstanceType": "S2.SMALL1",  # 替换为实际的实例规格
    "InstanceName": "MyInstance",  # 实例名称
    "Placement": {"Zone": "ap-guangzhou-2"},  # 可用区
    "SecurityGroupIds": ["sg-xxxxxx"],  # 安全组ID
    "SystemDisk": {"DiskType": "CLOUD_PREMIUM", "DiskSize": 50},  # 系统盘配置
    "InternetAccessible": {"InternetMaxBandwidthOut": 1, "PublicIpAssigned": True}  # 公网配置
}

response = client.RunInstances(params)
print(response)