flask web 8.6.1节，使用itsdangerous生成确认令牌

 今天继续学习<<Flask Web开发>>，第8.6.1节，使用itsdangerous生成确认令牌，在90页，简短的shell会话显示了如何使用itsdangerous包生成用户id的安全令牌，我在PyCharm中

Microsoft Windows [版本 10.0.16299.431]
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(venv) D:\PycharmProjects>cd flasky

(venv) D:\PycharmProjects\flasky>python manage shell
python: can't open file 'manage': [Errno 2] No such file or directory

(venv) D:\PycharmProjects\flasky>python manage.py shell
 * Serving Flask app "app" (lazy loading)
 * Environment: production
   WARNING: Do not use the development server in a production environment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 215-070-750
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
>>> from manage import app
>>> from itsdangerous import TimedJSONWebSignatureSerializer as Serializer
>>> s = Serializer(app.config['SECRET_KEY'],expires_in = 3600)
>>> token = s.dump({'confirm':23})
Traceback (most recent call last):
  File "<console>", line 1, in <module>
TypeError: dump() missing 1 required positional argument: 'f'
>>> token = s.dumps({'confirm':23})
>>> token
b'eyJhbGciOiJIUzI1NiIsImlhdCI6MTUyNjM1MDAxNywiZXhwIjoxNTI2MzUzNjE3fQ.eyJjb25maXJtIjoyM30.ijR0hzL6kxfwAFBaKMp_5k2oBYwCVMO_hSmoFlo5ooo'
>>> data = s.loads(token)
>>> data
{'confirm': 23}
>>>