from tencentcloud.common import credential
from tencentcloud.common.exception.tencent_cloud_sdk_exception import TencentCloudSDKException
from tencentcloud.cvm.v20170312 import cvm_client, models
try:
    cred = credential.Credential("secretId", "secretKey")
    client = cvm_client.CvmClient(cred, "ap-shanghai")
    req = models.DescribeInstancesRequest()
    resp = client.DescribeInstances(req)
    print(resp.to_json_string())
except TencentCloudSDKException as err:
    print(err)

# -*- coding: utf-8 -*-
import sys
import logging
​
from tencentcloud.common import credential
from tencentcloud.common.exception.tencent_cloud_sdk_exception import TencentCloudSDKException
# Import the client models of the corresponding product module.
from tencentcloud.cvm.v20170312 import cvm_client, models
​
# Import the optional configuration classes
from tencentcloud.common.profile.client_profile import ClientProfile
from tencentcloud.common.profile.http_profile import HttpProfile
try:
    # Instantiate an authentication object. Pass in `secretId` and `secretKey` of your Tencent Cloud account as the input parameters and keep them confidential
    cred = credential.Credential("SecretId", "SecretKey")
​
    # (Optional) Instantiate an HTTP option
    httpProfile = HttpProfile()
    # If you need to specify the proxy for API access, you can initialize HttpProfile as follows
    # httpProfile = HttpProfile(proxy="http://username:password@proxy IP:proxy port")
    httpProfile.protocol = "https"  # HTTP is supported if the network environment has access to the public network, and HTTPS is used by default and recommended
    httpProfile.keepAlive = True  # Specify whether to enable the keepalive feature. The default value is `False`
    httpProfile.reqMethod = "GET"  # GET request (POST request is used by default)
    httpProfile.reqTimeout = 30    # Specify the request timeout value in seconds. The default value is 60s
    httpProfile.endpoint = "cvm.ap-shanghai.tencentcloudapi.com"  # Specify the endpoint. If you do not specify the endpoint, nearby access is enabled by default
​
    # (Optional) Instantiate a client option
    clientProfile = ClientProfile()
    clientProfile.signMethod = "TC3-HMAC-SHA256"  # Specify the signature algorithm
    clientProfile.language = "en-US"  # Specify to display in English (the default value is Chinese)
    clientProfile.httpProfile = httpProfile
​
    # Instantiate the client object of the requested product (with CVM as an example). `clientProfile` is optional.
    client = cvm_client.CvmClient(cred, "ap-shanghai", clientProfile)
​
    # Print logs in the following format. You can also set `log_format`. The default value is '%(asctime)s %(process)d %(filename)s L%(lineno)s %(levelname)s %(message)s'
    # client.set_stream_logger(stream=sys.stdout, level=logging.DEBUG)
    # client.set_file_logger(file_path="/log", level=logging.DEBUG) Output log files in a rolling manner. A maximum of 10 files (up to 512 MB in size each) can be output
    # client.set_default_logger() Remove all log handlers, which are not output by default
​
    # Instantiate a CVM instance information query request object. Each API corresponds to a request object
    req = models.DescribeInstancesRequest()
​
    # Populate the request parameters. Here, the member variables of the request object are the input parameters of the corresponding API.
    # You can view the definition of the request parameters in the API documentation at the official website or by redirecting to the definition of the request object.
    respFilter = models.Filter()  # Create a `Filter` object to query CVM instances in the `zone` dimension.
    respFilter.Name = "zone"
    respFilter.Values = ["ap-shanghai-1", "ap-shanghai-2"]
    req.Filters = [respFilter]  # `Filters` is a list of `Filter` objects
​
    # Initialize the request by calling the `DescribeInstances` method on the client object. Note: the request method name corresponds to the request object
    # The returned `resp` is an instance of the `DescribeInstancesResponse` class which corresponds to the request object
    resp = client.DescribeInstances(req)
​
    # A string return packet in JSON format is outputted
    print(resp.to_json_string(indent=2))
​
    # You can also take a single value.
    # You can view the definition of the return field in the API documentation at the official website or by redirecting to the definition of the response object.
    print(resp.TotalCount)
except TencentCloudSDKException as err:
    print(err)