Question

我必须编写一个程序，该程序具有用户输入库存信息，计算一些变量，并在while循环中将其吐出。我一直收到这个错误：

NameError: name 'bc' is not defined

为行

amt_paidcomm_onpurch,sold_for,comm_onsale,profit_loss = calc(shares,pp,sp,bc)

以下是代码：

 def load():
    shares = int(input("Enter Number of shares: "))
    pp = float(input("Enter Purchase price: "))
    sp = float(input("Enter selling price: "))
    bc = float(input("Enter Commission: "))
    print("\n")

    return shares, pp, sp, bc

def calc(shares,pp,sp,bc):
    amt_paid = shares * pp
    comm_onpurch  = amt_paid * bc
    sold_for = shares * sp
    comm_onsale = sold_for * bc
    profit_loss = (sold_for - comm_onsale) - (amt_paid + comm_onpurch)

    return amt_paid, comm_onpurch, sold_for,comm_onsale,profit_loss

def output(name, amt_paid, comm_onpurch, sold_for,comm_onsale,profit_loss):
    print("Stock Name: ", name, "\n")
    print("Amount paid for the stock: $", format(amt_paid, ',.2f'))
    print("Commission paid on purchase: $", format(comm_onpurch, ',.2f'))
    print("Amount the stock sold for: $", format(sold_for, ',.2f'))
    print("Commission paid on the sale: $", format(comm_onsale, ',.2f'))
    print("Profit or loss (if negative): $", format(profit_loss, ',.2f'))
    print('\n')

def main():
    total=0.0
    name=input('Enter stock name or -999 to quit: ')
    while name != '-999':
        shares,pp,sp,rate=load()
        amt_paidcomm_onpurch,sold_for,comm_onsale,profit_loss = calc(shares,pp,sp,bc)
        output(name,amt_paid,comm_onpurch,sold_for,comm_onsale,profit_loss)
        total=total+profit_loss
        name=input("Enter stock name or -999 to quitz: ")
    print(total)
main()

谢谢！

Answer 1

当您致电load()时，您将变量bc分配给名称rate。因此，要么将其分配给名称bc，要么将calc函数的调用更改为使用rate。

即。目前你有：

    shares,pp,sp,rate=load()
    amt_paidcomm_onpurch,sold_for,comm_onsale,profit_loss = calc(shares,pp,sp,bc)

但是你需要这样的东西：

    shares,pp,sp,bc=load()
    amt_paidcomm_onpurch,sold_for,comm_onsale,profit_loss = calc(shares,pp,sp,bc)

或：

    shares,pp,sp,rate=load()
    amt_paidcomm_onpurch,sold_for,comm_onsale,profit_loss = calc(shares,pp,sp,rate)

调用函数时的NameError

1 个答案: