Python如何在合成并重命名文件后为Google云存储文件生成签名的url？

from google.cloud import storage
from google.auth import compute_engine

# 设置Google Cloud Storage的项目ID和存储桶名称
project_id = 'your-project-id'
bucket_name = 'your-bucket-name'

# 创建一个Google Cloud Storage客户端
client = storage.Client(project=project_id)

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

# 合成并重命名文件
source_blob_name = 'path/to/source/file.jpg'
destination_blob_name = 'path/to/destination/file.jpg'
source_blob = bucket.blob(source_blob_name)
destination_blob = bucket.rename_blob(source_blob, destination_blob_name)

# 生成签名的URL
url = destination_blob.generate_signed_url(
    version='v4',
    expiration=datetime.timedelta(minutes=15),
    method='GET'
)

print('生成的URL:', url)