将google驱动器文件从public更改为private

我在google驱动器上创建了一个公共文件,使用python上google驱动器的v3 api获取所有文件的列表。

现在我想更改一个文件权限,这样它将是私有的,并且只能由我(所有者)看到。

from __future__ import print_function
from apiclient.discovery import build
from httplib2 import Http
from oauth2client import file, client, tools

# Setup the Drive v3 API
SCOPES = 'https://www.googleapis.com/auth/drive.metadata.readonly'
store = file.Storage('credentials.json')
creds = store.get()
if not creds or creds.invalid:
    flow = client.flow_from_clientsecrets('client_id.json', SCOPES)
    creds = tools.run_flow(flow, store)
service = build('drive', 'v3', http=creds.authorize(Http()))

# Call the Drive v3 API
results = service.files().list(
    pageSize=10, fields="nextPageToken, files(id, name, modifiedTime, owners, permissions)").execute()
items = results.get('files', [])
if not items:
    print('No files found.')
else:
    print('Files:')
    for item in items:
        print('{0} ({1}) ({2})'.format(item['name'], item['id'], item["modifiedTime"])


Cosa = items[2]
print("--- Archivo Publico ---")
print(Cosa["permissions"])

print("---- Modifico los Permisos ----")

service.permissions().delete(fileId="ExampleID",permissionId="anyone").execute()

现在,当我执行代码时,我得到:

googleapiclient.errors.HttpError: <HttpError 403 when requesting https://www.googleapis.com/drive/v3/files/1KHjbcJkN79cccgwywrwsBHlOuLUgtOqXZk4gvZKR1eE/permissions/anyone? returned "Insufficient Permission">

为什么?我是文件的所有者。

编辑:文件有2个权限。第一个是“任何人”,让每个人看到和编辑文件。第二个是我的许可,这使我成为主人。我正试图删除第一个以使文件私有化