Rows That Are Not Constant

easynumpy_indexing

Implement rows_not_constant(X).

Given a 2D array X, return the sub-array of rows that are not constant (rows whose values are not all equal), preserving their order. Use a boolean row mask — no for/while loops.

Constraints

no scipy, sklearn
no for/while loops

Your solution

Edit rows_not_constant and run the real pytest suite in your browser — no install required. Your code is saved locally.

Loading the Python runtime (first run only)…

Hints

Hint 1

A row is constant iff its max equals its min — compare per-row max and min, then mask rows.