在Python数组中使用max（）和min（）失败

上下文：继续自学Python，我最近完成了一个教科书练习，要求提供一个程序，允许用户定义“x”年数，并能够在“x”中每个月输入降雨量值

问题：下面是我的代码，它的工作原理是“ok”，但最新的练习要求我“扩展”我的代码，在打印语句中显示数值最大和最小的用户输入降雨值

披露：我一直在关注S.O，试图找到我问题的解决方案，但似乎没有任何东西能够帮助我解决我的挑战。

我尝试过的：我尝试过使用

max（）

和

min（）

但是我不断得到一个

TypeError:“int”对象不可使用

当我键入代码

print（max（monthlyRainfall）

或

print（min（monthlyRainfall）

有人能提供一些“指针”来指出我的错误吗？

您可以使用和

0

来初始化变量，以跟踪最小和最大降雨量值，实际上用户永远不会分别在上面或下面输入

但是，对于第二种情况，只是为了确保您还可以添加一个简单的检查，以确保用户不会输入负降雨量：

def calculationAlgorithm(userYearsTracking):
    totalMonths = 0
    totalRainfall = 0
    maxRainfall = 0
    minRainfall = sys.maxsize
    for currentYear in range (1, userYearsTracking +1):
        for currentMonth in range (1, 13):
            monthlyRainfall = int(input("Inches of rainfall for month " + format(currentMonth, "d",) + " | year " +
                                    format(currentYear, "d",)+": "))
            if monthlyRainfall < 0:
                print("Error invalid rainfall entered")
                sys.exit()
            if monthlyRainfall > maxRainfall:
                maxRainfall = monthlyRainfall
            if monthlyRainfall < minRainfall:
                minRainfall = monthlyRainfall
            totalMonths += 1
            totalRainfall += monthlyRainfall
    averageRainfall = totalRainfall / totalMonths
    print("Total months: " + str(totalMonths))
    print("Total rain:", format(totalRainfall), "(inch)")
    print("Total average rainfall:", round(averageRainfall,2), "(inch)")
    print("Largest input rainfall: " + str(maxRainfall))
    print("Smallest input rainfall: " + str(minRainfall))

N.B.在命名新变量时，我只使用了，因为这是您正在使用的样式。我建议将程序中所有变量的名称更改为python中的惯例。

python内置的min（）和max（）函数需要可编辑的对象，如列表、集合等。我认为您只输入了一个不太正确的整数（当只给出1个数字时，您如何选择最小值或最大值？显然是bot min和max）。 一种方法是：

声明列表变量：

rainfallList=[]

然后，当您获得monthlyRainfall时，您应该添加以下代码：

rainfallList.append（月降雨量）

毕竟，对于循环，您可以使用min（rainfallList）和/或max（rainfallList）

因此，您的最终代码应该是：

def yearsToTrack():
    userYearsTracking = int(input("How many years do you want to track: "))
    return userYearsTracking

def calculationAlgorithm(userYearsTracking):
    totalMonths = 0
    totalRainfall = 0

    rainfallList = []

    for currentYear in range (1, userYearsTracking +1):
        for currentMonth in range (1, 13):
            monthlyRainfall = int(input("Inches of rainfall for month " + format(currentMonth, "d",) + " | year " +
                                    format(currentYear, "d",)+": "))
            totalMonths += 1
            rainfallList.append(monthlyRainfall)

            totalRainfall += monthlyRainfall
    averageRainfall = totalRainfall / totalMonths
    print("Total months: " + str(totalMonths))
    print("Total rain:", format(totalRainfall), "(inch)")
    print("Total average rainfall:", round(averageRainfall,2), "(inch)")
    print("Min rain:", format(min(rainfallList)), "(inch)")
    print("Max rain:", format(max(rainfallList)), "(inch)")

def main():
    userYearsTracking = yearsToTrack()
    calculationAlgorithm(userYearsTracking)
main()

---

print（str（…）

你能提到你当前的输出吗听起来你是在把一个

int

传递给

max

/

min

而不是它们的列表。这些函数（min，max）是在iterables（列表，元组等）上调用的。代码中没有这样的数据结构，您只需维护总计。您需要添加类似于

overallMin=min（overallMin，monthlyRainfall）的内容

到您的内部循环。max也一样。这些应该像总和变量一样初始化。感谢您简单的解释，这真的很有帮助。我曾考虑过声明列表，但一直说服自己我不需要。我很高兴这对您有帮助：）

How many years do you want to track:  1
Inches of rainfall for month 1 | year 1:  2
Inches of rainfall for month 2 | year 1:  2
Inches of rainfall for month 3 | year 1:  2
Inches of rainfall for month 4 | year 1:  2
Inches of rainfall for month 5 | year 1:  4
Inches of rainfall for month 6 | year 1:  1
Inches of rainfall for month 7 | year 1:  2
Inches of rainfall for month 8 | year 1:  2
Inches of rainfall for month 9 | year 1:  2
Inches of rainfall for month 10 | year 1:  2
Inches of rainfall for month 11 | year 1:  2
Inches of rainfall for month 12 | year 1:  2
Total months: 12
Total rain: 25 (inch)
Total average rainfall: 2.08 (inch)
Largest input rainfall: 4
Smallest input rainfall: 1

def yearsToTrack():
    userYearsTracking = int(input("How many years do you want to track: "))
    return userYearsTracking

def calculationAlgorithm(userYearsTracking):
    totalMonths = 0
    totalRainfall = 0

    rainfallList = []

    for currentYear in range (1, userYearsTracking +1):
        for currentMonth in range (1, 13):
            monthlyRainfall = int(input("Inches of rainfall for month " + format(currentMonth, "d",) + " | year " +
                                    format(currentYear, "d",)+": "))
            totalMonths += 1
            rainfallList.append(monthlyRainfall)

            totalRainfall += monthlyRainfall
    averageRainfall = totalRainfall / totalMonths
    print("Total months: " + str(totalMonths))
    print("Total rain:", format(totalRainfall), "(inch)")
    print("Total average rainfall:", round(averageRainfall,2), "(inch)")
    print("Min rain:", format(min(rainfallList)), "(inch)")
    print("Max rain:", format(max(rainfallList)), "(inch)")

def main():
    userYearsTracking = yearsToTrack()
    calculationAlgorithm(userYearsTracking)
main()