使用AccessKey

import os

from aliyunsdkcore.client import AcsClient
from aliyunsdkecs.request.v20140526.DescribeRegionsRequest import DescribeRegionsRequest

# 初始化Client
client = AcsClient(
    os.environ.get('ALIBABA_CLOUD_ACCESS_KEY_ID'),  # 從環境變量中獲取RAM賬號的AccessKey ID
    os.environ.get('ALIBABA_CLOUD_ACCESS_KEY_SECRET'),  # 從環境變量中獲取RAM賬號Access Key Secret
    '<region_id>'  # 地域ID
)

# 創建API請求并設置參數
request = DescribeRegionsRequest()

# 發送請求
response = client.do_action_with_exception(request)
print(str(response, encoding='utf-8'))

STS憑證

通過安全令牌服務（Security Token Service，簡稱STS），申請臨時安全憑證（Temporary Security Credentials，簡稱TSC），創建臨時安全客戶端。

import os

from aliyunsdkcore.client import AcsClient
from aliyunsdkcore.auth.credentials import StsTokenCredential
from aliyunsdkecs.request.v20140526.AcceptInquiredSystemEventRequest import AcceptInquiredSystemEventRequest

cred = StsTokenCredential(
    sts_access_key_id=os.environ.get('ALIBABA_CLOUD_ACCESS_KEY_ID'),  # 從環境變量中獲取STS Access Key Secret
    sts_access_key_secret=os.environ.get('ALIBABA_CLOUD_ACCESS_KEY_SECRET'),  # 從環境變量中獲取STS Access Key Secret
    sts_token=os.environ.get('ALIBABA_CLOUD_SECURITY_TOKEN')  # 從環境變量中獲取STS Access Key Secret Token
)

client = AcsClient(
    region_id='<region_id>',
    credential=cred
)

request = AcceptInquiredSystemEventRequest()
request.set_accept_format('json')
response = client.do_action_with_exception(request)

print(str(response, encoding='utf-8'))

RamRole憑證

通過指定RAM角色，讓客戶端在發起請求前自動申請維護STS Token，自動轉變為一個具有時限性的STS客戶端。您也可以自行申請維護STS Token，再創建STS客戶端。

import os

from aliyunsdkcore.client import AcsClient
from aliyunsdkcore.auth.credentials import RamRoleArnCredential
from aliyunsdkecs.request.v20140526.DescribeRegionsRequest import DescribeRegionsRequest

cred = RamRoleArnCredential(
    sts_access_key_id=os.environ.get('ALIBABA_CLOUD_ACCESS_KEY_ID'),  # 從環境變量中獲取RAM賬號的AccessKey ID
    sts_access_key_secret=os.environ.get('ALIBABA_CLOUD_ACCESS_KEY_SECRET'),  # 從環境變量中獲取RAM賬號Access Key Secret
    role_arn='<ram_role_arn>',
    session_role_name='<session_role_name>'
)

client = AcsClient(
    region_id='<region_id>',
    credential=cred
)

request = DescribeRegionsRequest()
response = client.do_action_with_exception(request)
print(str(response, encoding='utf-8'))

EcsRamRole憑證

實例化Esc Ram角色憑據時，該程序將攜帶指定的角色名稱并請求http://100.100.100.200/latest/meta-data/ram/security-credentials/ 以獲得臨時安全憑據。

from aliyunsdkcore.client import AcsClient
from aliyunsdkcore.auth.credentials import EcsRamRoleCredential
from aliyunsdkecs.request.v20140526.AcceptInquiredSystemEventRequest import AcceptInquiredSystemEventRequest

cred = EcsRamRoleCredential(
    role_name='<ram_role_name>'
)

client = AcsClient(
    region_id='<region_id>',
    credential=cred
)

request = AcceptInquiredSystemEventRequest()
request.set_accept_format('json')
response = client.do_action_with_exception(request)
print(str(response, encoding='utf-8'))

默認憑據

在環境變量中查找環境憑證，如果定義了ALIYUN_ACCESS_KEY_ID和ALIYUN_ACCESS_KEY_SECRET環境變量且不為空，程序將使用它們創建默認憑證。

from aliyunsdkcore.client import AcsClient
from aliyunsdkecs.request.v20140526.DescribeRegionsRequest import DescribeRegionsRequest

# 初始化Client
client = AcsClient(
    region_id='<region_id>'  # 地域ID
)

# 創建API請求并設置參數
request = DescribeRegionsRequest()

# 發送請求
response = client.do_action_with_exception(request)
print(str(response, encoding='utf-8'))