def pytest_funcarg__matrix_f(request):
    m = Matrix([
        [4, 4, 8, 12],
        [4, 5, 88, 13],
        [8, 8, 20, 28],
        [12, 13, 28, 42]
        ])
    return m
User AppCommands raise an error when multiple app names are provided
dataset/ETHPy150Open eBay/bayesian-belief-networks/bayesian/test/test_linear_algebra.py/pytest_funcarg__matrix_f--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/tests/regressiontests/admin_scripts/tests.py/CommandTypes.test_app_command_multiple_apps