python - 从 Python 函数返回多个值

Question

如何将 calculateTuitionIncrease 的返回语句传递到数组中，然后在计算总成本时使用该数组？

这是我的代码:

import math

def calculateTuitionIncrease(cost, increase, years):  
    #This function calculates the projected tuition increase for each year.  
    counter = 0  
    while counter <= years:  
        increasedCost = (cost)+(cost*increase)  
        return increasedCost  

def calculateTotalCost(terms,tuition,creditHours,books,roomAndBoard,scholarships):  
    #This function will calculate the total cost of all your expenses.  
    totalBookCost = (books*terms)  
    totalTuitionCost = (tuition*creditHours)*(terms)  
    totalRoomAndBoard =(roomAndBoard*terms)  
    totalCost = (totalBookCost+totalTuitionCost+totalRoomAndBoard)-(scholarships)  
    return totalCost


def main():

    #Variable declaration/initialization
    years = 0
    terms = 0
    numberOfSchools = 0

    tuitionCost1 = 0
    tuitionCost2 = 0
    tuitionCost3 = 0
    tuitionCost = 0

    bookCost = 0
    roomAndBoard = 0
    scholarships = 0

    tuitionIncrease = 0
    increasedCost = 0

    creditHours = 0
    overallCost = 0

    #User inputs
    years = int(input("Will you be going to school for 2, 4 or 6 years?"))

    #If-statements for if user will be going to multiple schools.
    if years == 4 or years == 6:
        numberOfSchools = int(input("How many schools do you plan on attending during this time?"))

    if numberOfSchools == 2:
        tuitionCost1 = int(input("How much will you be paying per credit hour at the first school you'll be attending?"))
        tuitionCost2 = int(input("How much will you be paying per credit hour at the second school you'll be attending?"))
        tuitionCost = (tuitionCost1+tuitionCost2)/(2) #Finds average tuition between schools & assigns it to a variable

    elif numberOfSchools == 3:
        tuitionCost1 = int(input("How much will you be paying per credit hour at the first school you'll be attending?"))
        tuitionCost2 = int(input("How much will you be paying per credit hour at the second school you'll be attending?"))
        tuitionCost3 = int(input("How much will you be paying per credit hour at the third school you'll be attending?"))
        tuitionCost = (tuitionCost1+tuitionCost2+tuitionCost3)/(3) #Finds average tuition cost between schools & assigns it to a variable

    else:
        tuitionCost = int(input("Please enter how much you will be paying per credit hour."))

    terms = (years*2)

    tuitionIncrease = float(input("Please enter the projected tuition increase per year in percentage form (ex. if increase is 7% enter .07)."))
    creditHours = int(input("On average, how many credit hours will you be receiving per term?"))
    roomAndBoard = int(input("Please enter what your price of room and board will be per term."))
    bookCost = int(input("Please enter what your average book cost will be per term."))
    scholarships = int(input("Please enter the total amount you will be recieving from grants and scholarships."))

    #Calls function that calculates tuition increase per year
    increasedCost = calculateTuitionIncrease(tuitionCost,tuitionIncrease,years)

    #Calls function that calculates the total cost.
    overallCost = calculateTotalCost(terms,tuitionCost,creditHours,bookCost,roomAndBoard,scholarships)

    print ("Your total estimated college cost is", overallCost)

main()

Answer 1

对于初学者来说，看起来 calculateTuitionIncrease 应该返回一个 list，因为目前它返回一个值并且循环是错误的(它根本没有前进):

def calculateTuitionIncrease(cost, increase, years):  
    # This function calculates the projected tuition increase for each year.  
    counter = 0
    answer = []
    while counter <= years:  
        increasedCost = (cost)+(cost*increase)  
        answer.append(increasedCost)
        counter += 1
    return answer

至于问题的第二部分，不清楚您应该如何“在计算总成本时使用该数组”，但您肯定必须遍历 calculateTuitionIncrease 返回的列表并且对每个元素做一些事情，每年 - 你应该知道如何做，它必须是你收到的问题描述的一部分。