Parses raw columns

        :param columns: matrix divided into columns
        :return: Matrix: Merge the columns to form a matrix

def from_columns(columns):
        """Parses raw columns

        :param columns: matrix divided into columns
        :return: Matrix: Merge the columns to form a matrix
        """
        data = [
            [
                column[i]
                for i in range(len(column))
            ]
            for column in columns
        ]
        return Matrix(data)