(self, j)
return self[:, j]
Elementary column selector.

        Examples
        ========

        >>> from sympy import eye
        >>> eye(2).col(0)
        Matrix([
        [1],
        [0]])

        See Also
        ========

        row
        col_op
        col_swap
        col_del
        col_join
        col_insert
Elementary column selector.
Elementary column selector .
def col(self, j):
        """Elementary column selector.

        Examples
        ========

        >>> from sympy import eye
        >>> eye(2).col(0)
        Matrix([
        [1],
        [0]])

        See Also
        ========

        row
        col_op
        col_swap
        col_del
        col_join
        col_insert
        """
        return self[:, j]
def col ( self , j ) : return self [ : , j ]