如何在 Python 3 上将文件上传到 Google Cloud Storage？

Question

如何从 Python 3 将文件上传到 Google Cloud Storage？最终是 Python 2，如果它从 Python 3 不可行的话。

我看了又看，但还没有找到真正有效的解决方案。我试过boto，但是当我尝试通过gsutil config -e生成必要的.boto文件时，它一直说我需要通过gcloud auth login配置身份验证。但是，我已经多次完成后者，但没有它的帮助。

Answer 1

使用标准的gcloud 库，它同时支持 Python 2 和 Python 3。

上传文件到云存储示例

from gcloud import storage
from oauth2client.service_account import ServiceAccountCredentials
import os


credentials_dict = {
    'type': 'service_account',
    'client_id': os.environ['BACKUP_CLIENT_ID'],
    'client_email': os.environ['BACKUP_CLIENT_EMAIL'],
    'private_key_id': os.environ['BACKUP_PRIVATE_KEY_ID'],
    'private_key': os.environ['BACKUP_PRIVATE_KEY'],
}
credentials = ServiceAccountCredentials.from_json_keyfile_dict(
    credentials_dict
)
client = storage.Client(credentials=credentials, project='myproject')
bucket = client.get_bucket('mybucket')
blob = bucket.blob('myfile')
blob.upload_from_filename('myfile')

Answer 2

将文件上传到 gcloud 存储桶的简单函数。

from google.cloud import storage

def upload_to_bucket(blob_name, path_to_file, bucket_name):
    """ Upload data to a bucket"""

    # Explicitly use service account credentials by specifying the private key
    # file.
    storage_client = storage.Client.from_service_account_json(
        'creds.json')

    #print(buckets = list(storage_client.list_buckets())

    bucket = storage_client.get_bucket(bucket_name)
    blob = bucket.blob(blob_name)
    blob.upload_from_filename(path_to_file)

    #returns a public url
    return blob.public_url

您可以使用此链接生成凭证文件：https://cloud.google.com/storage/docs/reference/libraries?authuser=1#client-libraries-install-python

异步示例：

import asyncio
import aiohttp
# pip install aiofile
from aiofile import AIOFile
# pip install gcloud-aio-storage
from gcloud.aio.storage import Storage 

BUCKET_NAME = '<bucket_name>'
FILE_NAME  = 'requirements.txt'
async def async_upload_to_bucket(blob_name, file_obj, folder='uploads'):
    """ Upload csv files to bucket. """
    async with aiohttp.ClientSession() as session:
        storage = Storage(service_file='./creds.json', session=session) 
        status = await storage.upload(BUCKET_NAME, f'{folder}/{blob_name}', file_obj)
        #info of the uploaded file
        # print(status)
        return status['selfLink']


async def main():
    async with AIOFile(FILE_NAME, mode='r') as afp:
        f = await afp.read()
        url = await async_upload_to_bucket(FILE_NAME, f)
        print(url)


# Python 3.6
loop = asyncio.get_event_loop()
loop.run_until_complete(main())

# Python 3.7+
# asyncio.run(main()) 

Answer 3

导入谷歌云客户端库（需要credentials）

from google.cloud import storage
import os
os.environ["GOOGLE_APPLICATION_CREDENTIALS"]="C:/Users/siva/Downloads/My First Project-e2d95d910f92.json" 

实例化一个客户端

storage_client = storage.Client()

buckets = list(storage_client.list_buckets())

bucket = storage_client.get_bucket("ad_documents")//your bucket name

blob = bucket.blob('/chosen-path-to-object/{name-of-object}')
blob.upload_from_filename('D:/Download/02-06-53.pdf')
print(buckets)

Answer 4

安装 Google Cloud Storage API 时：

pip install google-cloud

会抛出一个ModuleNotFoundError:

    from google.cloud import storage
ModuleNotFoundError: No module named 'google'

确保安装方式为 Cloud Storage Client Libraries Docs:

pip install --upgrade google-cloud-storage