import os​
import tos​
​
# Retrieve AKSK information from environment variables.​
ak = os.getenv('TOS_ACCESS_KEY')​
sk = os.getenv('TOS_SECRET_KEY')​
endpoint = "your endpoint"​
region = "your region"​
bucket_name = 'bucket-test'​
object_key = 'object-key'​
try:​
    # Create a TosClientV2 object to perform operations on buckets and objects​
    client = tos.TosClientV2(ak, sk, endpoint, region)​
    # Get object metadata​
    result = client.head_object(bucket_name, object_key)​
except tos.exceptions.TosClientError as e:​
    # Operation failed, catch client error, usually caused by invalid request parameters or network issues​
    print('fail with client error, message:{}, cause: {}'.format(e.message, e.cause))​
except tos.exceptions.TosServerError as e:​
    if e.status_code == 404:​
        print("Object not found.")​
    else:​
        # Operation failed, catch server error, detailed error information can be obtained from the response​
        print('fail with server error, code: {}'.format(e.code))​
        # request id can be used to locate specific issues, it is strongly recommended to save it in the log.​
        print('error with request id: {}'.format(e.request_id))​
        print('error with message: {}'.format(e.message))​
        print('error with http code: {}'.format(e.status_code))​
        print('error with ec: {}'.format(e.ec))​
        print('error with request url: {}'.format(e.request_url))​
except Exception as e:​
    print('fail with unknown error: {}'.format(e))​