(self, j)
return self[:, j]
Returns column j from self as a column vector.

        Examples
        ========

        >>> from sympy.matrices import SparseMatrix
        >>> a = SparseMatrix(((1, 2), (3, 4)))
        >>> a.col(0)
        Matrix([
        [1],
        [3]])

        See Also
        ========
        row
        col_list
Returns column j from self as a column vector.
Returns column j from self as a column vector .
def col(self, j):
        """Returns column j from self as a column vector.

        Examples
        ========

        >>> from sympy.matrices import SparseMatrix
        >>> a = SparseMatrix(((1, 2), (3, 4)))
        >>> a.col(0)
        Matrix([
        [1],
        [3]])

        See Also
        ========
        row
        col_list
        """
        return self[:, j]
def col ( self , j ) : return self [ : , j ]