如何使用Python将文件插入/上载到Google Drive API v3中的特定文件夹

Question

每天我下载许多pdf文件，这些文件存储在本地电脑上。要存储所有这些文件，我需要每天在Google drive上创建一个文件夹，并将所有pdf文件存储在当前日期文件夹下。
我在这里面临的挑战是，我已经成功地用Python编写了使用GDrive API v3创建文件夹的代码，但仍然坚持将所有文件上载到刚刚创建的文件夹中。以下是我如何在当前日期创建文件夹的编码：

    import pickle
    import os.path, time
    from googleapiclient.discovery import build
    from google_auth_oauthlib.flow import InstalledAppFlow
    from google.auth.transport.requests import Request
    from apiclient.http import MediaFileUpload
    from datetime import date
    SCOPES = ['https://www.googleapis.com/auth/drive.file']
    CLIENT_SECRET_FILE = 'e:\\Python Programs\\credentials.json'

    creds = None
    if os.path.exists('token.pickle'):
      with open('token.pickle', 'rb') as token:
        creds = pickle.load(token)
    if not creds or not creds.valid:
      if creds and creds.expired and creds.refresh_token:
        creds.refresh(Request())
      else:
        flow = InstalledAppFlow.from_client_secrets_file(CLIENT_SECRET_FILE, SCOPES)
    creds = flow.run_local_server(port=0)
    with open('token.pickle', 'wb') as token:
      pickle.dump(creds, token)

    # main folder ID under which we are going to create subfolder
    parents_ID = '19nKlHGCypKPr40f3vjaEq22kgVkS7OCE'
    # creates sub folder under main folder ID
    fldr_name = date.today().strftime('%d%b%Y')
    mimetype = 'application/vnd.google-apps.folder'
    file_metadata = {'name': fldr_name, 'parents': [parents_ID],'mimeType': mimetype}
    # with following line I could successfully create folder without any problem
    service.files().create(body=file_metadata, fields='id').execute()

    # with following lines, i tried to get the folder ID which was recently created so that I can start coding to upload pdf files onto this.  Here im stuck
    page_token = None
    response =  service.files().list(q="mimeType='application/vnd.google-apps.folder' and name = '27Apr2020' and trashed = false", spaces='drive', fields='nextPageToken, files(id, name)', pageToken=page_token).execute()
    for file in response.get('files', []):
      print(file.get('name'), file.get('id'))
    time.sleep(5)

我得到了5秒的空白屏幕，然后它消失了。请帮助我将所有文件上载到最近创建的文件夹

谢谢

Answer 1

从上面的代码中，以下行已经返回了刚刚创建的文件夹的id（fields='id'）

service.files().create(body=file_metadata, fields='id').execute()

您还可以在创建文件夹时使用fields参数返回其他值（名称、父项等）

service.files().create(body=file_metadata, fields='id, name, parents').execute()

因此，如果您在下面这样的变量中捕获返回值

folder = service.files().create(body=file_metadata, fields='id').execute()

返回的值看起来像{'id'：'17w2RS1H7S8no6X0oGtkieY'}

然后，您可以通过以下命令上载文件

file_metadata = {
        'name': "test.pdf", <Name of the file to be in drive>
        'parents': [folder["id"]],
        'mimeType': 'application/pdf'
    }
media = MediaFileUpload(<local path to file>, resumable=True)
file = service.files().create(body=file_metadata, media_body=media, fields='id,name').execute()

您需要导入以下内容：

from googleapiclient.http import MediaFileUpload