How to import python files

https://stackoverflow.com/questions/2349991/how-to-import-other-python-files

Shiny and plotly event handle examples and tutorials

1. Example use case of plotly event_data & plotlyProxy

https://github.com/mw201608/Shiny/blob/master/plotly_event_data.R

2. How to test if a trace is hidden or shown

https://stackoverflow.com/questions/54822671/r-plotly-how-to-observe-whether-a-trace-is-hidden-or-shown-through-legend-click/54825337#54825337

3. Hide and show sidebar panel

https://stackoverflow.com/questions/47896963/hide-and-show-sidebar-panel-in-shiny

4. Proxy Interface in R

https://plotly.com/r/plotlyproxy/

5. Restyle the traces

https://community.plotly.com/t/how-can-i-determine-how-many-traces-exists-in-my-graph-and-what-are-those/6797

6. Sending messages from Shiny to JavaScript and back

https://shiny.rstudio.com/articles/js-send-message.html

https://shiny.rstudio.com/articles/communicating-with-js.html

7. Shiny performance

https://plotly-r.com/linking-views-with-shiny.html#shiny-performance

8. Intro JS

https://introjs.com/

plotly event_register

* The `event` argument of the `event_data()` function now supports the following events: `plotly_selecting`, `plotly_brushed`, `plotly_brushing`, `plotly_restyle`, `plotly_legendclick`, `plotly_legenddoubleclick`, `plotly_clickannotation`, `plotly_afterplot`, `plotly_doubleclick`, `plotly_deselect`, `plotly_unhover`. For examples, see `plotly_example("shiny", "event_data")`, `plotly_example("shiny", "event_data_legends")`, and `plotly_example("shiny", "event_data_annotation")`,

* New `event_register()` and `event_unregister()` functions for declaring which events to transmit over the wire (i.e., from the browser to the shiny server). Events that are likely to have large overhead are not registered by default, so you'll need to register these: `plotly_selecting`, `plotly_unhover`, `plotly_restyle`, `plotly_legendclick`, and `plotly_legenddoubleclick`.