def vec(self):
        return self.T.reshape(len(self), 1)
Write the given mtime to an item's `mtime` field and to the mtime
dataset/ETHPy150Open sympy/sympy/sympy/matrices/matrices.py/MatrixBase.vec--crossover with--dataset/ETHPy150Open beetbox/beets/beetsplug/importadded.py/ImportAddedPlugin.write_item_mtime