Question

我是python的新手，我还在学习。我花了几个小时但我想出了如何做功能，但是我很难让用户输入他们想要输入的数量。输出只能工作一次，我确定这是因为for循环被分成两个函数，但我似乎无法弄清楚for循环是否仅进入负载，如果是这样会影响def calc（）:?

  def main():
    num_stocks,name,numsh,pp,sp,comm=load()
    Amtpaid,bycomm,stocksold,scomm,profit=calc(num_stocks,name,numsh,pp,sp,comm)
    prnt(Amtpaid,bycomm,stocksold,scomm,profit)

def load():
    #load inputs
    num_stocks=int(input("How many stocks do you want processed?"))
    for i in range (num_stocks):
        print("Stock number",i+1)
        print(".....................")
        name=input("Enter stock name:\n")
        numsh=float(input("Number of Shares:\n"))
        pp=float(input("Enter Purchase Price:\n"))
        sp=float(input("Enter Selling Price:\n"))
        comm=float(input("Enter Commission:\n"))
        print("Stock Results",end='')
        print("..................")
        return  num_stocks,name,numsh,pp,sp,comm

def calc(num_stocks,name,numsh,pp,sp,comm):
    #calculations
    for d in range (num_stocks):
        Amtpaid=numsh*pp
        bycomm=Amtpaid*comm
        stocksold=numsh*sp
        scomm=stocksold*comm
        profit=(Amtpaid+comm)-(scomm-comm)
        return Amtpaid,bycomm,stocksold,scomm,profit

def prnt(Amtpaid,bycomm,stocksold,scomm,profit):
    #print outputs
    print("Amount paid for stock:$",format(Amtpaid,',.2f'))
    print("Commision paid on the purchase:$",format(bycomm,',.2f'))
    print("Amount the stock sold for:$:",format(stocksold,',.2f'))
    print("Commission paid on the sale:$",format(scomm,',.2f'))
    print("Profit:$",format(profit,',.2f'))
    print("\n")


main()

Answer 1

在你的for循环中：

for d in range(num_stucks):
       #todo
       prnt(a, b, c, d, e, f)

因为当你运行循环一次时，你会返回值，所以它会打破循环。

Answer 2

问题在于您在return函数的for循环中应用的load语句。

将它带到循环之外。如果要调用其他函数，请在循环内调用它们。比如在你的情况下调用call函数（你在main中调用）而不是return语句

def main():
    num_stocks,name,numsh,pp,sp,comm=load()


def load():
    #load inputs
    num_stocks=int(input("How many stocks do you want processed?"))
    for i in range (num_stocks):
        print("Stock number",i+1)
        print(".....................")
        name=input("Enter stock name:\n")
        numsh=float(input("Number of Shares:\n"))
        pp=float(input("Enter Purchase Price:\n"))
        sp=float(input("Enter Selling Price:\n"))
        comm=float(input("Enter Commission:\n"))
        print("Stock Results",end='')
        print("..................")
        calc(num_stocks,name,numsh,pp,sp,comm)

def calc(num_stocks,name,numsh,pp,sp,comm):
    #calculations
    for d in range (num_stocks):
        Amtpaid=numsh*pp
        bycomm=Amtpaid*comm
        stocksold=numsh*sp
        scomm=stocksold*comm
        profit=(Amtpaid+comm)-(scomm-comm)
        prnt(Amtpaid,bycomm,stocksold,scomm,profit)

def prnt(Amtpaid,bycomm,stocksold,scomm,profit):
    #print outputs
    print("Amount paid for stock:$",format(Amtpaid,',.2f'))
    print("Commision paid on the purchase:$",format(bycomm,',.2f'))
    print("Amount the stock sold for:$:",format(stocksold,',.2f'))
    print("Commission paid on the sale:$",format(scomm,',.2f'))
    print("Profit:$",format(profit,',.2f'))
    print("\n")


main()

这是解决方案。

Answer 3

我在for中只有一个main()循环，它驱动了一系列调用你定义的函数以处理每个事务。恭喜你不使用全局变量，这可能是我看到新手所犯的头号错误。

我还强烈建议你开始学习（和跟随）PEP 8 - Style Guide for Python Code并使用更多的空格，这是你的朋友，因为它使你的代码更具可读性。

def main():
    num_stocks = int(input("How many stocks do you want processed?"))
    for stock_number in range(1, num_stocks+1):
        name, numsh, pp, sp, comm = load(stock_number)
        amtpaid, bycomm, stocksold, scomm, profit = calc(name, numsh, pp, sp,
                                                         comm)
        prnt(amtpaid, bycomm, stocksold, scomm, profit)

def load(stock_number):
    # load inputs for one transaction
    print("Stock number", stock_number)
    print(".....................")
    name = input("Enter stock name:\n")
    numsh = float(input("Number of Shares:\n"))
    pp = float(input("Enter Purchase Price:\n"))
    sp = float(input("Enter Selling Price:\n"))
    comm = float(input("Enter Commission:\n"))
    print("Stock Results", end='')
    print("..................")
    return name, numsh, pp, sp, comm

def calc(name, numsh, pp, sp, comm):
    # calculations for one transaction
    amtpaid = numsh*pp
    bycomm = amtpaid*comm
    stocksold = numsh*sp
    scomm = stocksold*comm
    profit = (amtpaid+comm) - (scomm-comm)
    return amtpaid, bycomm, stocksold, scomm, profit

def prnt(amtpaid, bycomm, stocksold, scomm, profit):
    # print output for one transaction
    print("Amount paid for stock: ${:,.2f}".format(amtpaid))
    print("Commision paid on the purchase: ${:,.2f}".format(bycomm))
    print("Amount the stock sold for: ${:,.2f}".format(stocksold))
    print("Commission paid on the sale: ${:,.2f}".format(scomm))
    print("Profit: ${:,.2f}".format(profit))
    print("\n")

main()

我在哪里添加for循环？股票交易

3 个答案: