使用Python從Google雲端存儲下載多個文件

Question

我正在嘗試從Google雲存儲文件夾下載多個文件。 我可以下載單個文件，但無法下載多個文件。 我從這個鏈接中獲取了這個參考，但似乎它不起作用。 代碼如下：

# [download multiple files]
bucket_name = 'bigquery-hive-load'
# The "folder" where the files you want to download are
folder="/projects/bigquery/download/shakespeare/"

# Create this folder locally
if not os.path.exists(folder):
    os.makedirs(folder)

# Retrieve all blobs with a prefix matching the folder
    bucket=storage_client.get_bucket(bucket_name)
    print(bucket)
    blobs=list(bucket.list_blobs(prefix=folder))
    print(blobs)
    for blob in blobs:
        if(not blob.name.endswith("/")):
            blob.download_to_filename(blob.name)

# [End download to multiple files]

有沒有辦法下載與模式（名稱）或其他東西匹配的多個文件。 由於我從bigquery導出文件，文件名將如下所示：

shakespeare-000000000000.csv.gz
shakespeare-000000000001.csv.gz
shakespeare-000000000002.csv.gz
shakespeare-000000000003.csv.gz

參考：下載單個文件的工作代碼：

# [download to single files]

edgenode_destination_uri = '/projects/bigquery/download/shakespeare-000000000000.csv.gz'
bucket_name = 'bigquery-hive-load'
gcs_bucket = storage_client.get_bucket(bucket_name)
blob = gcs_bucket.blob("shakespeare.csv.gz")
blob.download_to_filename(edgenode_destination_uri)
logging.info('Downloded {} to {}'.format(
    gcs_bucket, edgenode_destination_uri))

# [end download to single files]

Answer 1

經過一番試驗，我解決了這個問題，也無法阻止自己在這里發布。

bucket_name = 'mybucket'
folder='/projects/bigquery/download/shakespeare/'
delimiter='/'
file = 'shakespeare'

# Retrieve all blobs with a prefix matching the file.
bucket=storage_client.get_bucket(bucket_name)
# List blobs iterate in folder 
blobs=bucket.list_blobs(prefix=file, delimiter=delimiter) # Excluding folder inside bucket
for blob in blobs:
   print(blob.name)
   destination_uri = '{}/{}'.format(folder, blob.name) 
   blob.download_to_filename(destination_uri)

Answer 2

看起來你可能只是在你的python代碼中有錯誤的縮進級別。 以# Retrieve all blobs with a prefix matching the folder開頭的塊# Retrieve all blobs with a prefix matching the folder都在if的范圍內，因此如果文件夾已經存在則永遠不會執行。

試試這個：

# [download multiple files]
bucket_name = 'bigquery-hive-load'
# The "folder" where the files you want to download are
folder="/projects/bigquery/download/shakespeare/"

# Create this folder locally
if not os.path.exists(folder):
    os.makedirs(folder)

# Retrieve all blobs with a prefix matching the folder
bucket=storage_client.get_bucket(bucket_name)
print(bucket)
blobs=list(bucket.list_blobs(prefix=folder))
print(blobs)
for blob in blobs:
    if(not blob.name.endswith("/")):
        blob.download_to_filename(blob.name)

# [End download to multiple files]