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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def sub_description(self):
 """Time and space dscription"""

        gd = self.geo_description
        td = self.time_description

        if gd and td:
            return '{}, {}. {} Rows.'.format(gd, td, self._p.count)
        elif gd:
            return '{}. {} Rows.'.format(gd, self._p.count)
        elif td:
            return '{}. {} Rows.'.format(td, self._p.count)
        else:
            return '{} Rows.'.format(self._p.count)