使用Google Cloud Storage python客户端进行批量请求

Question

我找不到任何关于如何使用python google云存储的批处理功能的示例。 我看到它存在于此 。

我喜欢一个具体的例子。 假设我想删除一堆带有给定前缀的blob。 我开始按如下方式获取blob列表

from google.cloud import storage

storage_client = storage.Client()
bucket = storage_client.get_bucket('my_bucket_name')
blobs_to_delete = bucket.list_blobs(prefix="my/prefix/here")

# how do I delete the blobs in blobs_to_delete in a single batch?

# bonus: if I have more than 100 blobs to delete, handle the limitation
#        that a batch can only handle 100 operations

Answer 1

TL; DR - 只需发送batch()上下文管理器中的所有请求（可在google-cloud-python库中找到）

试试这个例子：

from google.cloud import storage

storage_client = storage.Client()
bucket = storage_client.get_bucket('my_bucket_name')
# Accumulate the iterated results in a list prior to issuing
# batch within the context manager
blobs_to_delete = [blob for blob in bucket.list_blobs(prefix="my/prefix/here")]

# Use the batch context manager to delete all the blobs    
with storage_client.batch():
    for blob in blobs_to_delete:
        blob.delete()

如果您直接使用REST API，则只需担心每批100个项目。 batch()上下文管理器自动处理此限制，并在需要时发出多个批处理请求。