Downloading an Object - Obtaining the Download Progress (SDK for Python)

from obs import ObsClient
import os
import traceback

# Obtain an AK and SK pair using environment variables or import the AK and SK pair in other ways. Using hard coding may result in leakage.
# Obtain an AK and SK pair on the management console. For details, see https://support.huaweicloud.com/intl/en-us/usermanual-ca/ca_01_0003.html.
ak = os.getenv("AccessKeyID")
sk = os.getenv("SecretAccessKey")
# (Optional) If you use a temporary AK and SK pair and a security token to access OBS, obtain them from environment variables.
security_token = os.getenv("SecurityToken")
# Set server to the endpoint corresponding to the bucket. Here uses CN-Hong Kong as an example. Replace it with the one in use.
server = "https://obs.ap-southeast-1.myhuaweicloud.com" 

# Create an obsClient instance.
# If you use a temporary AK and SK pair and a security token to access OBS, you must specify security_token when creating an instance.
obsClient = ObsClient(access_key_id=ak, secret_access_key=sk, server=server)

# Obtain the download progress.
def callback(transferredAmount, totalAmount, totalSeconds):
    # Obtain the average download rate (KB/s).
    print(transferredAmount * 1.0 / totalSeconds / 1024)
    # Obtain the download progress in percentage.
    print(transferredAmount * 100.0 / totalAmount)

try:
    bucketName="examplebucket"
    objectKey="objectname"
    # Download an object.
    resp = obsClient.getObject(bucketName=bucketName,objectKey=objectKey, progressCallback=callback)
    # If status code 2xx is returned, the API is called successfully. Otherwise, the API call fails.
    if resp.status < 300:
        print('Get Object Succeeded')
        print('requestId:', resp.requestId)
        # Read the object content.
        while True:
            chunk = resp.body.response.read(65536)
            if not chunk:
                break
            print(chunk)
        resp.body.response.close()
    else:
        print('Get Object Failed')
        print('requestId:', resp.requestId)
        print('errorCode:', resp.errorCode)
        print('errorMessage:', resp.errorMessage)
except:
    print('Get Object Failed')
    print(traceback.format_exc())