Re: sessions

You can read the docs: 

https://docs.djangoproject.com/zh-hans/2.0/topics/http/sessions/#django.contrib.sessions.backends.base.SessionBase

or the source code: https://github.com/django/django/blob/578e576c31fcd5757c3f4fc2dea7673b3462f575/django/contrib/sessions/backends/base.py

If still confusing, maybe you should learn HTTP session and cookies:

https://en.wikipedia.org/wiki/Session_(computer_science)

john speny <johnspeny@gmail.com>于2018年6月23日周六 下午9:55写道：

What does the method session.keys() do or particularly that keys() method

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