如何通过Google的Gmail api设置sendAsEmail

pip install --upgrade google-api-python-client google-auth-httplib2 google-auth-oauthlib

from google_auth_oauthlib.flow import InstalledAppFlow
from google.oauth2.credentials import Credentials

SCOPES = ['https://www.googleapis.com/auth/gmail.modify']

creds = None
if os.path.exists('token.json'):
    creds = Credentials.from_authorized_user_file('token.json', SCOPES)

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('credentials.json', SCOPES)
        creds = flow.run_local_server(port=0)
    with open('token.json', 'w') as token:
        token.write(creds.to_json())

from googleapiclient.discovery import build

service = build('gmail', 'v1', credentials=creds)

# 获取用户的sendAs信息
send_as_info = service.users().settings().sendAs().list(userId='me').execute()

# 查找要设置为默认的sendAsEmail
send_as_email = None
for info in send_as_info['sendAs']:
    if info['isPrimary']:
        send_as_email = info
        break

if send_as_email:
    # 更新sendAsEmail
    updated_send_as_email = {
        'isPrimary': True,
        'signature': '您的签名',
        'replyToAddress': '您的回复地址'
    }
    service.users().settings().sendAs().update(userId='me', sendAsEmail=send_as_email['sendAsEmail'], body=updated_send_asEmail).execute()