一直收到非典型的

Question

我还是个新手。代码应该继续循环，直到/除非我在没有输入值的情况下按enter键。它运行两个循环，然后给我一个NoneType错误。沮丧的。请帮忙。我的代码：

import random
hourly = 70
CustomerID = random.randint(100000,999999)
Customers = {}
characters = ['a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,A,B,C,D,E,F,G,H,I,J,K,L,,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z']

def generateRecord():
    cusName = input('Enter customer name:')
    cusIncome = int(input('Enter customer annual income:'))
    consulTime = int(input('Enter Consultation time in minutes:'))
    if cusIncome <= 25000:
                     CustRate = (.4)
                     print('Rate = 40% for time over 30 minutes')
    if cusIncome > 25000:
                     CustRate = (.7)
                     print('Rate = 70% for time over 20 minutes')
    if CustRate ==.4 and consulTime< 30:
        CustRate == 0
    if CustRate==.7 and consulTime <20:
        CustRate == 0

    billingAmt = hourly*CustRate*(consulTime/60)
    CustomerID
    print('Customer ID is '+str(CustomerID))
    Customers[CustomerID] = [cusName, cusIncome, consulTime, CustRate, billingAmt]

def generateBillAmount():
    cusIncome = int(input('Enter customer annual income:'))
    consulTime = int(input('Enter Consultation time in minutes:'))
    if cusIncome <= 25000:
        CustRate = .4
        print('Rate = 40% for time over 30 minutes')
    else:
        CustRate = .7
        print('Rate = 70% for time over 20 minutes')
    if CustRate ==.4 and consulTime< 30:
        CustRate = 0
    if CustRate==.7 and consulTime <20:
        CustRate = 0
    billingAmt = int(hourly*CustRate*(consulTime/60))
    if CustRate==.4 and consulTime>30:
        billingAmt = int(hourly*CustRate*((consulTime-30)/60))
    if CustRate==.7 and consulTime>20:
        billingAmt = int(hourly*CustRate*((consulTime-20)/60))
    print('Customer total is ' +str(billingAmt)+' dollars.')

generateRecord()
for cusName in generateRecord():
    for character in cusName:
        if cusName == '\n':
            print(Customers)
            break
        else:
            generateRecord()
generateBillAmount()

它通常会返回以下内容：

Enter customer name:jake
Enter customer annual income:15000
Enter Consultation time in minutes:15
Rate = 40% for time over 30 minutes
Customer ID is 594578
Enter customer name:trix
Enter customer annual income:45000
Enter Consultation time in minutes:45
Rate = 70% for time over 20 minutes
Customer ID is 594578

Traceback (most recent call last):
  File "C:/Users/Hammad/GenerateRecords.py", line 45, in <module>
    *for cusName in generateRecord():
TypeError: 'NoneType' object is not iterable*

Answer 1

这是因为generateRecord()不返回任何内容。因此，创建的任何内容都不会被保存。因此，默认情况下它将是None，不能迭代。将定义更改为以下内容

def generateRecord(Customers):

在函数的末尾添加Add

return Customers

这将在函数范围之外更改Customers字典。。。你知道吗

Answer 2

除非显式指定return值，否则python返回None作为默认值。因为您在generateRecord()的响应上循环，这就是None；所以您得到了一个错误。尝试定义函数的返回值