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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 _holiday_entry(self):
 """Return the abstract holiday information from holidays table."""

        holidays_list = self.get_holidays_for_year()
        holidays_list = [
            holiday for holiday, holiday_hdate in holidays_list if
            holiday_hdate.hdate == self.hdate
        ]
        assert len(holidays_list) <= 1

        # If anything is left return it, otherwise return the "NULL" holiday
        return holidays_list[0] if holidays_list else htables.HOLIDAYS[0]