如何在命名空间中使用+ =函数

import boto3

s3 = boto3.resource('s3')
bucket_name = 'my-bucket'
key = 'my-key'
value = 'my-value'

obj = s3.Object(bucket_name, key)
current_value = obj.get()['Body'].read().decode('utf-8')
new_value = current_value + value
obj.put(Body=new_value)

from azure.storage.blob import BlobServiceClient

connection_string = 'my-connection-string'
container_name = 'my-container'
blob_name = 'my-blob'
value = 'my-value'

blob_service_client = BlobServiceClient.from_connection_string(connection_string)
container_client = blob_service_client.get_container_client(container_name)
blob_client = container_client.get_blob_client(blob_name)
current_value = blob_client.download_blob().content_as_text()
new_value = current_value + value
blob_client.upload_blob(new_value, overwrite=True)

from google.cloud import storage

bucket_name = 'my-bucket'
key = 'my-key'
value = 'my-value'

storage_client = storage.Client()
bucket = storage_client.get_bucket(bucket_name)
blob = bucket.blob(key)
current_value = blob.download_as_text()
new_value = current_value + value
blob.upload_from_string(new_value, content_type='text/plain')