Full walkthrough: read the companion article
Checkpoint: Adding an expense updates the metrics and bar chart instantly, and data survives refreshes.
Key takeaways
- • st.form to batch inputs
- • groupby + chart rendering
- • Month filtering with to_period
Project 9: Expense Tracker
30 min • Beginner • Module 4
Build a personal finance app — logging, summaries, and charts from one CSV.