(self, i, f)
In-place operation on row ``i`` using two-arg functor whose args are
        interpreted as ``(self[i, j], j)``.

        Examples
        ========

        >>> from sympy.matrices import SparseMatrix
        >>> M = SparseMatrix.eye(3)*2
        >>> M[0, 1] = -1
        >>> M.row_op(1, lambda v, j: v + 2*M[0, j]); M
        Matrix([
        [2, -1, 0],
        [4,  0, 0],
        [0,  0, 2]])

        See Also
        ========
        row
        zip_row_op
        col_op
In-place operation on row ``i`` using two-arg functor whose args are
        interpreted as ``(self[i, j], j)``.
In - place operation on row i using two - arg functor whose args are interpreted as ( self [ i j ] j ) .
def row_op(self, i, f):
        """In-place operation on row ``i`` using two-arg functor whose args are
        interpreted as ``(self[i, j], j)``.

        Examples
        ========

        >>> from sympy.matrices import SparseMatrix
        >>> M = SparseMatrix.eye(3)*2
        >>> M[0, 1] = -1
        >>> M.row_op(1, lambda v, j: v + 2*M[0, j]); M
        Matrix([
        [2, -1, 0],
        [4,  0, 0],
        [0,  0, 2]])

        See Also
        ========
        row
        zip_row_op
        col_op

        """
        for j in range(self.cols):
            v = self._smat.get((i, j), S.Zero)
            fv = f(v, j)
            if fv:
                self._smat[(i, j)] = fv
            elif v:
                self._smat.pop((i, j))
def row_op ( self , i , f ) : for j in range ( self . cols ) : v = self . _smat . get ( ( i , j ) , S . Zero ) fv = f ( v , j ) if fv : self . _smat [ ( i , j ) ] = fv elif v : self . _smat . pop ( ( i , j ) )