python - 不断收到非类型错误

Question

我对此还很陌生。该代码应该继续循环，直到/除非我按回车键而不输入值。它进行了 2 个循环，然后给出了 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()

以下是它通常返回的内容:

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

除非显式指定返回值，否则Python默认返回None。由于您正在循环 generateRecord() 的响应，该响应为 None；所以你得到一个错误。尝试为函数定义一个返回值