Python pattern

Deduplication

4 problems in this pattern, climbing easy → medium → hard. Pick wherever you're calibrated.

Looking for SQL? Those problems moved to Deduplication & Latest Row →

Easy

0 / 1 solved

Remove fully-duplicate rows
Python · ~7 min
NEW

Medium

0 / 2 solved

Hard

0 / 1 solved

Compact partial updates into the current row per id
Python · ~16 min
NEW