doris: a minimal dashboard engine

This project shows learners how to build a dashboard creator like Dash (Schroeder2022) using Flask, htpy, Polars, and Chart.xkcd. Along the way, it introduces a bit of JavaScript and shows how to test web applications.

Learner Persona

• Sabina, 28, has a master's degree in animal physiology and now works for a mid-sized veterinary pharmaceutical company.
• She learned a bit of R in an undergraduate biostatistics course, then picked up Python in grad school. She spends several hours a week analyzing data and visualizing it with Plotly Express, and is comfortable with basic Git commands.
• Sabina recently became responsible for maintaining a dashboard application built with Dash. She believes a better understanding of how web applications work will help her debug and extend it.
• English is Sabina's second language, and she sometimes feels left out when people use slang or programming jargon.

Contents

1. Generate HTML
2. Fetch Data
3. Display a Chart
4. Select Data
5. Handle Multiple Charts
6. Register Callbacks
7. Create a Framework
8. Trigger Events

Appendices