Hi. I’m trying to build an app where a multi-indexed dataframe is shown. Ideally I’d like to see the table collapsed to the first level of index vs. columns after each time page is initialized (with each row being the sum of group), but leaving the feature of clicking on each index to expand the detailed rows to the user. I know it can be down using other solutions but I reeeeeally love Streamlit and in fact, I want to stick to this framework for this app of mine.
Any ideas? 
Hi @allenfrostline and welcome to the forum 
Unfortunately, right now that’s not supported in Streamlit.
However, one of our major goals for 2020 is Streamlit plugin system which will give you the ability to write arbitrary JavaScript code and insert it into your app. This opens the door for a lot of possibilities for custom solutions to layout, visualization, interactivity with chart/maps/tables, and other unique needs of your app. You can help design this feature or follow its progress over there https://github.com/streamlit/streamlit/issues/327.
And thanks for using Streamlit!
These cookies are necessary for the website to function and cannot be switched off. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us understand how visitors move around the site and which pages are most frequently visited.
These cookies are used to record your choices and settings, maintain your preferences over time and recognize you when you return to our website. These cookies help us to personalize our content for you and remember your preferences.
These cookies may be deployed to our site by our advertising partners to build a profile of your interest and provide you with content that is relevant to you, including showing you relevant ads on other websites.