第三方登录（微信、QQ等）集成方法

from flask import Flask, redirect, url_for, request, session
import requests

app = Flask(__name__)
app.secret_key = 'your_secret_key'

@app.route('/')
def index():
    if 'openid' in session:
        return f'Logged in as {session["openid"]}'
    return 'You are not logged in'

@app.route('/login')
def login():
    return redirect(f'https://open.weixin.qq.com/connect/qrconnect?appid=YOUR_APPID&redirect_uri={url_for("authorized", _external=True)}&response_type=code&scope=snsapi_login#wechat_redirect')

@app.route('/authorized')
def authorized():
    code = request.args.get('code')
    if code:
        token_url = 'https://api.weixin.qq.com/sns/oauth2/access_token'
        params = {
            'appid': 'YOUR_APPID',
            'secret': 'YOUR_APPSECRET',
            'code': code,
            'grant_type': 'authorization_code'
        }
        response = requests.get(token_url, params=params)
        data = response.json()
        session['openid'] = data['openid']
        return redirect(url_for('index'))
    return 'Failed to log in'

if __name__ == '__main__':
    app.run(debug=True)