谷歌云存储签名的url块下载在python？

from google.cloud import storage

def download_signed_url(bucket_name, object_name, expiration):
    # 创建存储客户端
    client = storage.Client()

    # 获取存储桶
    bucket = client.get_bucket(bucket_name)

    # 获取对象
    blob = bucket.blob(object_name)

    # 生成签名的URL
    signed_url = blob.generate_signed_url(
        version="v4",
        expiration=expiration,
        method="GET"
    )

    return signed_url

# 调用函数下载签名的URL块
signed_url = download_signed_url("your-bucket-name", "your-object-name", 3600)
print(signed_url)