datarekha
Section 3 chapters · 13 lessons

Pandas

Read, clean, reshape, join, and analyze tabular data. Avoid the silent bugs that bite everyone. Learn the patterns that scale to millions of rows.

0 / 13 lessons
Start with Series
  1. 01

    Getting Started

    5 lessons
  2. 01 Series Beginner 6 min
  3. 02 DataFrame basics Beginner 8 min
  4. 03 Reading data Beginner 7 min
  5. 04 Selection: loc vs iloc Beginner 8 min
  6. 05 Missing data Intermediate 7 min
  7. 02

    Transforming Data

    5 lessons
  8. 06 GroupBy Intermediate 10 min
  9. 07 Merge & join Intermediate 8 min
  10. 08 pivot, melt, stack Intermediate 8 min
  11. 09 Time series Intermediate 9 min
  12. 10 Method chaining Intermediate 6 min
  13. 03

    Performance & Pitfalls

    3 lessons
  14. 11 Memory optimization Advanced 7 min
  15. 12 SettingWithCopyWarning — fixed Intermediate 6 min
  16. 13 When to switch to Polars Advanced 5 min
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