需要脚本从存储blob中删除旧备份文件，该脚本需要从托管实例运行

import os
from azure.storage.blob import BlobServiceClient

# 连接到存储账户
connection_string = "<your_connection_string>"
blob_service_client = BlobServiceClient.from_connection_string(connection_string)

# 定义存储容器和文件路径
container_name = "<your_container_name>"
folder_path = "<your_folder_path>"

# 获取容器中的所有blob
container_client = blob_service_client.get_container_client(container_name)
blobs = container_client.list_blobs()

# 遍历blob，删除旧备份文件
for blob in blobs:
    if blob.name.startswith(folder_path):
        # 判断文件是否为旧备份文件，根据自己的业务逻辑进行判断
        if is_old_backup(blob.name):
            container_client.delete_blob(blob.name)
            print(f"Deleted blob: {blob.name}")

# 判断文件是否为旧备份文件的示例函数
def is_old_backup(file_name):
    # 根据自己的业务逻辑判断文件是否为旧备份文件
    # 返回True或False
    pass