使用python从azure容器本地下载所有blob文件 [英] Download all blobs files locally from azure container using python

问题描述

我在Visual Studio中使用python 3.6，我想从我的azure容器的单个文件夹中下载所有blob文件.这是我的代码，但是问题是，它在文件夹中下载了一个Blob文件，然后在下载第二个文件时，它覆盖了第一个文件，最后，我的本地文件夹中只有最后一个Blob.如何一次将所有Blob文件下载到一个文件夹中?

I'm using python 3.6 in visual studio and I want to download all blobs files from my azure container in single folder. This is my code but the problem is, that it downloads 1 blob file in the folder and then when downloading the second file it overwrite the first file and in the end I only have the last blob in my local folder. How can I download all the blobs files at once in a single folder?

from azure.storage.blob import BlockBlobService
block_blob_service = BlockBlobService(account_name=ACCOUNT_NAME, account_key=ACCOUNT_KEY)

generator = block_blob_service.list_blobs(CONTAINER_NAME)
        for blob in generator:
            block_blob_service.get_blob_to_path(CONTAINER_NAME, blob.name, LOCAL_FILE)

推荐答案

根据我的理解，我认为有两种解决方案可以满足您的需求.

Based on my understanding, I think there are two solutions for your needs.

1. 从容器中下载所有blob，然后通过get_blob_to_bytes或get_blob_to_stream方法将这些blob内容写入单个文件，请参见下面的示例代码.

1. Download all blobs from a container, and write these blob content to a single file via the method get_blob_to_bytes or get_blob_to_stream, please see my sample code as below.

from azure.storage.blob import BlockBlobService

block_blob_service = BlockBlobService(account_name=ACCOUNT_NAME, account_key=ACCOUNT_KEY)

generator = block_blob_service.list_blobs(CONTAINER_NAME)

fp = open('<your-local-file-name>', 'ab')

for blob in generator:
    # Using `get_blob_to_bytes`
    b = service.get_blob_to_bytes(container_name, blob.name)
    fp.write(b.content)
    # Or using `get_blob_to_stream`
    # service.get_blob_to_stream(container_name, blob.name, fp)

fp.flush()
fp.close()

从容器中下载所有blob，然后通过get_blob_to_bytes方法将这些blob写入zip文件，请参见下面的示例代码.

Download all blobs from a container, and write these blobs into a zip file via the method get_blob_to_bytes, please see my sample code below.

from azure.storage.blob import BlockBlobService
import zipfile

block_blob_service = BlockBlobService(account_name=ACCOUNT_NAME, account_key=ACCOUNT_KEY)

generator = block_blob_service.list_blobs(CONTAINER_NAME)

zf = zipfile.ZipFile(CONTAINER_NAME+'.zip', 
             mode='w',
             compression=zipfile.ZIP_DEFLATED, 
             )

for blob in generator:
    b = service.get_blob_to_bytes(container_name, blob.name)
    zf.writestr(blob.name, b.content)

zf.close()

希望它会有所帮助.如有任何疑问，请随时告诉我.

Hope it helps. Any concern, please feel free to let me know.

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