如何使用来自 Azure StorageStreamDownloader 的 lxml iterparse？

Question

我目前正在使用lxml.etree.iterparse逐个标记迭代 XML 文件标记。 Locally this works fine but I want to move the XML file to an Azure Blob Storage and process the file in an Azure function. 但是，我有点坚持尝试从StorageStreamDownloader解析 XML 文件

本地编码

from lxml import etree

context = etree.iterparse('c:\\Users\\', tag='InstanceElement')

for event, elem in context:
    # processing of the tag

从 Blob 流式传输

from lxml import etree
from azure.storage.filedatalake import DataLakeServiceClient

connect_str = ''
service = DataLakeServiceClient.from_connection_string(conn_str=connect_string)

System = service.get_file_system_client('')
FileClient = System.get_file_client('')
Stream = FileClient.download_file()

# Stuck on what the input must be for iterparse
context = etree.iterparse(, tag='InstanceElement')

for event, elem in context:
    # processing of the tag

我坚持iterparse的输入必须是什么，所以关于如何在流式传输时解析 XML 文件的任何想法？

Answer 1

尝试这个：

from lxml import etree
from azure.storage.filedatalake import DataLakeServiceClient
from io  import BytesIO

connect_str = ''
service = DataLakeServiceClient.from_connection_string(conn_str=connect_str)

System = service.get_file_system_client('')
FileClient = System.get_file_client('test.xml')
content = FileClient.download_file().readall()

context = etree.iterparse(BytesIO(content), tag='InstanceElement')
for event, elem in context:
    print(elem.text)

我的test.xml的内容：

结果：