def is_writable(self):
        return self.writable
Convert a scipy.sparse zero matrix to the zero scalar.
dataset/ETHPy150Open richrd/suplemon/suplemon/file.py/File.is_writable--crossover with--dataset/ETHPy150Open sympy/sympy/sympy/physics/quantum/matrixutils.py/_scipy_sparse_matrix_to_zero