Python/Flask谷歌API集成

Question

我是新来的Python以及Flask ...我已经开发了一个python文件，它设置了googele的Oauth2身份验证并从GMAIL API获取消息列表。这里是我的代码

import json 
import flask 
import httplib2 
import base64 
import email 

from apiclient import discovery, errors 
from oauth2client import client 


app = flask.Flask(__name__) 


@app.route('/') 
def index(): 
    if 'credentials' not in flask.session: 
     return flask.redirect(flask.url_for('oauth2callback')) 
    credentials = client.OAuth2Credentials.from_json(flask.session['credentials']) 
    if credentials.access_token_expired: 
     return flask.redirect(flask.url_for('oauth2callback')) 
    else: 
     http_auth = credentials.authorize(httplib2.Http()) 
     gmail_service = discovery.build('gmail', 'v1', http_auth) 
     threads = gmail_service.users().threads().list(userId='me').execute() 
     return json.dumps(threads) 


@app.route('/oauth2callback') 
def oauth2callback(): 
    flow = client.flow_from_clientsecrets(
     'client_secrets.json', 
     scope='https://mail.google.com/', 
     redirect_uri=flask.url_for('oauth2callback', _external=True) 
    ) 
    if 'code' not in flask.request.args: 
     auth_uri = flow.step1_get_authorize_url() 
     return flask.redirect(auth_uri) 
    else: 
     auth_code = flask.request.args.get('code') 
     credentials = flow.step2_exchange(auth_code) 
     flask.session['credentials'] = credentials.to_json() 
     return flask.redirect(flask.url_for('index')) 

@app.route('/getmail') 
def getmail(): 
    if 'credentials' not in flask.session: 
     return flask.redirect(flask.url_for('oauth2callback')) 
    credentials = client.OAuth2Credentials.from_json(flask.session['credentials']) 
    if credentials.access_token_expired: 
     return flask.redirect(flask.url_for('oauth2callback')) 
    else: 
     http_auth = credentials.authorize(httplib2.Http()) 
     gmail_service = discovery.build('gmail', 'v1', http_auth) 
     query = 'is:inbox' 
     """List all Messages of the user's mailbox matching the query. 

     Args: 
     service: Authorized Gmail API service instance. 
     user_id: User's email address. The special value "me" 
     can be used to indicate the authenticated user. 
     query: String used to filter messages returned. 
     Eg.- 'from:user@some_domain.com' for Messages from a particular sender. 

     Returns: 
     List of Messages that match the criteria of the query. Note that the 
     returned list contains Message IDs, you must use get with the 
     appropriate ID to get the details of a Message. 
     """ 
     try: 
      response = gmail_service.users().messages().list(userId='me', q=query).execute() 
      messages = [] 
      if 'messages' in response: 
       print 'test %s' % response 
       messages.extend(response['messages']) 
      while 'nextPageToken' in response: 
       page_token = response['nextPageToken'] 
       response = gmail_service.users().messages().list(userId='me', q=query, pageToken=page_token).execute() 
       messages.extend(response['messages']) 

      return messages 
     except errors.HttpError, error: 
      print 'An error occurred: %s' % error 

if __name__ == '__main__': 
    import uuid 
    app.secret_key = str(uuid.uuid4()) 
    app.debug = True 
    app.run() 

认证工作正常，当我去/getmail URL我收到此错误TypeError: 'list' object is not callable

任何思考什么，我做错了什么？

Answer 1

我将Flask中的返回对象从return messages更改为这段代码。

首先，我导入到from flask.json import jsonify

try: 
    response = gmail_service.users().messages().list(userId='me', q=query).execute() 
    messages = [] 
    if 'messages' in response: 
     print 'test %s' % response 
     messages.extend(response['messages']) 
    while 'nextPageToken' in response: 
     page_token = response['nextPageToken'] 
     response = gmail_service.users().messages().list(userId='me', q=query, pageToken=page_token).execute() 
     messages.extend(response['messages']) 

    return jsonify({'data': messages}) # changed here 
except errors.HttpError, error: 
    print 'An error occurred: %s' % error 

都归功于@doru