Update for using st.session_state

[saikumarmk]

As of Streamlit 1.12, the older API used to hack in a SessionState has been entirely deprecated (with an ugly hack to retrieve the Server from the GC) in favour of the built-in st.session_state. This comes from the advice of this gist here: https://gist.github.com/tvst/036da038ab3e999a64497f42de966a92

I'd be happy to contribute a pull request (I think it should be minor changes), though my only concern is that hydralit_components may require the old SessionState. Could any of the maintainers of either repository comment on this?

[TangleSpace]

you are most welcome to help fix this issue, thank you. The changes Streamlit made are large and we haven't had time yet to refactor the code, so any help would be greatly appreciated.

As for hydralit_components, it doesn't use the session state, so it will be fine, as all the state usage is only within the Hydralit package.

[saikumarmk]

Update:

I've rewritten the code to avoid using the state hack, and instead use st.session_state. Additionally, the get method was replicated with this snippet of code:

        self._session_attrs = {'previous_app': None, 'selected_app': None, 'other_nav_app': None,
                               'preserve_state': preserve_state, 'allow_access': self._no_access_level, 'logged_in': False, 'access_hash': None}
        self.session_state = st.session_state

        if isinstance(self._user_session_params, Dict):
            self._session_attrs |= self._user_session_params

        for key, item in self._session_attrs.items():
            if not hasattr(self.session_state, key):
                self.session_state[key] = item

I've run this by the hydralit-example, and all seems functional (login, changing menus etc). I'll open a PR for further discussion.

[TangleSpace]

Thanks very much for your hard work saikumarmk!

latest package (1.0.14) has ben published.
pip install -U hydralit