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Identify the error in the following code snippet:

medium📝 Debug Q6 of 15
SciPy - Sparse Linear Algebra
Identify the error in the following code snippet:
from scipy.sparse.linalg import spsolve
from scipy.sparse import csr_matrix

A = [[1, 0], [0, 1]]
b = [1, 2]
x = spsolve(A, b)
print(x)
AMissing import for numpy
BMatrix A is not a sparse matrix format
Cspsolve requires dense matrices
DVector b is not a numpy array
Step-by-Step Solution
Solution:
  1. Step 1: Check matrix format

    Matrix A is a regular Python list, not a sparse matrix like csr_matrix.
  2. Step 2: Understand spsolve requirements

    spsolve requires the matrix to be in a sparse format, such as csr_matrix.
  3. Final Answer:

    Matrix A is not a sparse matrix format -> Option B
  4. Quick Check:

    Matrix format must be sparse for spsolve [OK]
Quick Trick: Convert A to sparse format before using spsolve [OK]
Common Mistakes:
  • Passing dense lists instead of sparse matrices
  • Assuming spsolve accepts Python lists
  • Ignoring matrix format requirements

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