def update_mtime(path):
    execute('touch', '-c', path, run_as_root=True)
Apply a function to each element of the matrix.
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/virt/libvirt/utils.py/update_mtime--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/matrices/dense.py/DenseMatrix.applyfunc