腾讯云接口怎么调用

import requests
import time
import hashlib
import hmac

secret_id = 'your_secret_id'
secret_key = 'your_secret_key'
url = 'cvm.tencentcloudapi/'
params = {
    'Action': 'DescribeInstances',
    'Version': '2017-03-12',
    'Timestamp': str(int(time.time())),
    'Nonce': '1',
    'SecretId': secret_id,
}

def generate_signature(params):
    sorted_params = sorted(params.items())
    query_string = '&'.join(['{}={}'.format(k, v) for k, v in sorted_params])
    string_to_sign = 'GET' + url + '?' + query_string
    signature = hmac.new(secret_key.encode(), string_to_sign.encode(), hashlib.sha256).hexdigest()
    return signature

params['Signature'] = generate_signature(params)
response = requests.get(url, params=params)
print(response.json())