简单示例，使用google-cloud Python库：

from google.cloud import storage

def upload_blob(bucket_name, source_file_name, destination_blob_name):
  """Uploads a file to the bucket."""
  storage_client = storage.Client()
  bucket = storage_client.get_bucket(bucket_name)
  blob = bucket.blob(destination_blob_name)

  blob.upload_from_filename(source_file_name)

  print('File {} uploaded to {}.'.format(
      source_file_name,
      destination_blob_name))

更多例子在这个GitHub repo中：https://github.com/GoogleCloudPlatform/python-docs-samples/blob/master/storage/cloud-client

当我们想把一个字符串写入GCS bucket blob时，唯一需要做的修改是使用blob.upload_from_string(your_string)而不是blob.upload_from_filename(source_file_name)：

from google.cloud import storage

def write_to_cloud(your_string):
    client = storage.Client()
    bucket = client.get_bucket('bucket123456789')
    blob = bucket.blob('PIM.txt')
    blob.upload_from_string(your_string)

from googleapiclient import discovery
from oauth2client.client import GoogleCredentials

credentials = GoogleCredentials.get_application_default()
service = discovery.build('storage', 'v1', credentials=credentials)
filename = 'file.csv'
bucket = 'Your bucket name here'
body = {'name': 'file.csv'}    
req = service.objects().insert(bucket=bucket, body=body, media_body=filename)
resp = req.execute()

在前面的答案中，我仍然忽略了最简单的方法，即使用open()方法。
可以按如下方式使用blob.open()：

from google.cloud import storage
    
def write_file():
    client = storage.Client()
        bucket = client.get_bucket('bucket-name')
        blob = bucket.blob('path/to/new-blob-name.txt') 
        ## Use bucket.get_blob('path/to/existing-blob-name.txt') to write to existing blobs
        with blob.open(mode='w') as f:
            for line in object: 
                f.write(line)

您可以在此处找到更多示例和片段：https://github.com/googleapis/python-storage/tree/main/samples/snippets

from google.cloud import storage

def write_to_cloud(buffer):
    client = storage.Client()
    bucket = client.get_bucket('bucket123456789')
    blob = bucket.blob('PIM.txt')
    blob.upload_from_file(buffer)

虽然Brandon's answer确实将文件上传到了Google云，但它是通过上传文件而不是写入文件来完成的，这意味着在上传到云之前，文件需要存在于磁盘上。
我提出的解决方案使用一个“内存中”的有效负载（buffer参数），然后将其写入云。要写入内容，您需要使用upload_from_file而不是upload_from_filename，其他一切都是相同的。