[Solved] What is the issue with this code?from scipy.sparse import save_npz, load_npz matrix = [[0, 1], [2, 0]] save_npz('matrix.npz', matrix) loaded = load_npz('matrix.npz') | SciPy

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What is the issue with this code?

from scipy.sparse import save_npz, load_npz
matrix = [[0, 1], [2, 0]]
save_npz('matrix.npz', matrix)
loaded = load_npz('matrix.npz')

AThe variable 'matrix' is a list, not a sparse matrix

BThe file extension '.npz' is invalid

Cload_npz cannot load files saved by save_npz

DMissing import for numpy

Step-by-Step Solution

Solution:

Step 1: Check variable type
The variable matrix is a Python list, not a sparse matrix object.
Step 2: save_npz expects sparse matrix
save_npz requires a sparse matrix (e.g., csr_matrix), not a list.
Final Answer:
The variable 'matrix' is a list, not a sparse matrix -> Option A
Quick Check:
Verify input type to save_npz [OK]

Quick Trick: save_npz requires sparse matrix, not plain lists [OK]

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What is the issue with this code?