如何从类中获取最早/最早的年份值

class Year:
    def __init__(self):
        self.years = []

    def addYear(self, year):
        self.years.append(year)

    def getEarliestYear(self):
        earliestYear = self.years[0]
        for year in self.years:
            if year < earliestYear:
                earliestYear = year
        return earliestYear

    def getLatestYear(self):
        latestYear = self.years[0]
        for year in self.years:
            if year > latestYear:
                latestYear = year
        return latestYear

    def getYearRange(self):
        earliestYear = self.getEarliestYear()
        latestYear = self.getLatestYear()
        return f"Earliest year: {earliestYear}, Latest year: {latestYear}"

# 示例用法
yearObj = Year()
yearObj.addYear(2000)
yearObj.addYear(1990)
yearObj.addYear(2010)
yearObj.addYear(1980)

print(yearObj.getYearRange())