我刚刚开始尝试使用 Google Drive API。使用快速入门指南，我设置了身份验证，我可以打印文件列表，甚至可以进行复印。所有这些都很好用，但是我在尝试从云端硬盘上的文件访问数据时遇到问题。特别是，我想得到一个WebViewLink，但是当我打电话时.get我只收到一本小字典，几乎没有任何文件的元数据。文档 https://developers.google.com/resources/api-libraries/documentation/drive/v3/python/latest/drive_v3.files.html#get看起来默认情况下所有数据都应该在那里，但它没有出现。我找不到任何方法来标记请求任何附加信息。
credentials = get_credentials()
http = credentials.authorize(httplib2.Http())
service = discovery.build('drive', 'v3', http=http)
results = service.files().list(fields="nextPageToken, files(id, name)").execute()
items = results.get('files', [])
if not items:
print('No files found.')
else:
print('Files:')
for item in items:
print(item['name'], item['id'])
if "Target File" in item['name']:
d = service.files().get(fileId=item['id']).execute()
print(repr(d))
这是上面代码的输出：（格式是我做的）
{u'mimeType': u'application/vnd.google-apps.document',
u'kind': u'drive#file',
u'id': u'1VO9cC8mGM67onVYx3_2f-SYzLJPR4_LteQzILdWJgDE',
u'name': u'Fix TVP Licence Issues'}
对于任何对代码感到困惑的人来说，缺少一些只是基本的内容get_credentials来自 API 的函数快速启动页面 https://developers.google.com/gmail/api/quickstart/python以及一些常量和导入。为了完整起见，以下是我的代码中未修改的所有内容：
from __future__ import print_function
import httplib2
import os
from apiclient import discovery
import oauth2client
from oauth2client import client
from oauth2client import tools
SCOPES = 'https://www.googleapis.com/auth/drive'
CLIENT_SECRET_FILE = 'client_secret.json'
APPLICATION_NAME = 'Drive API Python Quickstart'
try:
import argparse
flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
except ImportError:
flags = None
def get_credentials():
"""Gets valid user credentials from storage.
If nothing has been stored, or if the stored credentials are invalid,
the OAuth2 flow is completed to obtain the new credentials.
Returns:
Credentials, the obtained credential.
"""
home_dir = os.path.expanduser('~')
credential_dir = os.path.join(home_dir, '.credentials')
if not os.path.exists(credential_dir):
os.makedirs(credential_dir)
credential_path = os.path.join(credential_dir,
'drive-python-quickstart.json')
store = oauth2client.file.Storage(credential_path)
credentials = store.get()
if not credentials or credentials.invalid:
flow = client.flow_from_clientsecrets(CLIENT_SECRET_FILE, SCOPES)
flow.user_agent = APPLICATION_NAME
if flags:
credentials = tools.run_flow(flow, store, flags)
else: # Needed only for compatibility with Python 2.6
credentials = tools.run(flow, store)
print('Storing credentials to ' + credential_path)
return credentials
那么缺少什么，我怎样才能让 API 返回所有现在没有出现的额外元数据呢？
