从 Google Cloud Storage 下载文件

如何解决从 Google Cloud Storage 下载文件

我在尝试从 Google Cloud Storage 下载 CSV 文件时遇到问题。出于某种原因，它不断将文件下载为字节而不是可读文本。当我在 Excel 中打开下载的 CSV 时，Excel 以某种方式足够智能，可以将其转换为可读文本。我在这里缺少什么？ 我检查了谷歌的文档，但找不到任何关于如何完成它们的好信息。提前致谢！

storage_client = storage.Client()
bucket = storage_client.bucket("bucket_name")
blob = bucket.blob("csv_file.csv")
blob = blob.download_as_string()
blob = blob.decode('utf-8')
blob = io.StringIO(blob)  # tranform bytes to string here
print(blob)

这是错误：UnicodeDecodeError: 'utf-8' codec can't decode bytes in position 15-16: invalid continuation byte

解决方法

您可以使用官方文档中的代码，函数blob.download_to_filename ()。你为什么使用 blob.download_as_string() ？

Downloading objects

from google.cloud import storage


def download_blob(bucket_name,source_blob_name,destination_file_name):
    """Downloads a blob from the bucket."""
    # bucket_name = "your-bucket-name"
    # source_blob_name = "storage-object-name"
    # destination_file_name = "local/path/to/file"

    storage_client = storage.Client()

    bucket = storage_client.bucket(bucket_name)

    # Construct a client side representation of a blob.
    # Note `Bucket.blob` differs from `Bucket.get_blob` as it doesn't retrieve
    # any content from Google Cloud Storage. As we don't need additional data,# using `Bucket.blob` is preferred here.
    blob = bucket.blob(source_blob_name)
    blob.download_to_filename(destination_file_name)

    print(
        "Blob {} downloaded to {}.".format(
            source_blob_name,destination_file_name
        )
    )