problem in running a code

[snippsat]

As mention you most name function wih unique name eg add1 add2.

# file: add_functions.py
# solution1
def add1(matrix1, matrix2):
    """Add corresponding numbers in given 2-D matrices."""
    combined = []
    for i in range(len(matrix1)):
        row = []
        for j in range(len(matrix1[i])):
            row.append(matrix1[i][j] + matrix2[i][j])
        combined.append(row)
    return combined

#solution2:
def add2(matrix1, matrix2):
    """Add corresponding numbers in given 2-D matrices."""
    combined = []
    for rows in zip(matrix1, matrix2):
        row = []
        for items in zip(rows[0], rows[1]):
            row.append(items[0] + items[1])
        combined.append(row)
    return combined

Now to give a example using pytest
A better tool than unittest as deanhystad mention.

# file: test_add.py
import pytest
from add_functions import add1, add2

test_cases = [
    (add1, [[[5]], [[-2]]], [[3]]),
    (add2, [[[1, 2], [3, 4]], [[5, 6], [7, 8]]], [[6, 8], [10, 12]]),
]

@pytest.mark.parametrize('add_func, input_matrices, expected_output', test_cases)
def test_add(add_func, input_matrices, expected_output):
    actual_output = add_func(input_matrices[0], input_matrices[1])
    print(f"\nRunning {add_func.__name__} with input {input_matrices}:")
    print(f"Output: {actual_output}")
    assert actual_output == expected_output, (
        f"Expected {expected_output}, got {actual_output}."
    )

So if add -s it will also show output,and not just passed or failed.

Output:
G:\div_code\matx
λ pytest -v -s
=========test session starts ============
platform win32 -- Python 3.11.3, pytest-7.4.2, pluggy-1.3.0 -- C:\python311\python.exe
cachedir: .pytest_cache
rootdir: G:\div_code\matx
collected 2 items

test_add.py::test_add[add1-input_matrices0-expected_output0]
Running add1 with input [[[5]], [[-2]]]:
Output: [[3]]
PASSED
test_add.py::test_add[add2-input_matrices1-expected_output1]
Running add2 with input [[[1, 2], [3, 4]], [[5, 6], [7, 8]]]:
Output: [[6, 8], [10, 12]]
PASSED