Question

介绍python课程，基本上我们要做的就是向用户询问一个号码，然后根据该号码询问他们想要访问的城市列表。然后我们必须打印它，然后再次打印，数字调整为1。尝试在我编写代码时检查我的代码，但是我遇到了一个问题，我在传递给PrintAddOneCityNumSentence的字符串中列出了一个问题，我一直得到AttributeError：＆＃39; NoneType＆＃39;对象没有属性＆＃39; split＆＃39;

非常感谢任何帮助感谢

def MainFunction():
    number_cities = raw_input('How many cities would you like to list?,please use whole numeric values')
    user_number = AskForNumberCities(number_cities)
    user_city_list = AskForCityName(user_number)
    first_print = PrintFirstCitySentence(user_city_list)
    print first_print
    second_print = PrintAddOneCityNumSentence(first_print)
    print second_print



def AskForNumberCities(number_cities):
    try:
        int_number_cities = int(number_cities)
    except:
        ValueError
        print("Come on WHOLE NUMBERS!")
    else:
        print "Ok we can work with", int_number_cities ,"!"
    return int_number_cities


def AskForCityName(number):
    int_number = int(number)
    CityNameList = []
    while len(CityNameList) != int_number:
        for i in range(int_number):
            NewCityName = raw_input("Ok give me a city name")
            if NewCityName in CityNameList:
                print ("You already used that :/")
                continue
            else:
                CityNameList.append(NewCityName)
    else:
        return CityNameList
        print CityNameList

**def PrintFirstCitySentence(city_list):
    print_city_list = city_list
    x = 1
    print 'You would like to visit',
    for i in range(len(print_city_list)):**
        n = x + i
        print print_city_list[i],
        print 'as city',n,
    print ' on your trip'

def PrintAddOneCityNumSentence(first_print):
    first_print_list = first_print.split()
    for i in range(len(first_print_list)):
        if i.isdigit():
            i.append(i+1)





MainFunction()


None
  File "/Users/python_class/PycharmProjects/homework4/homework4.py", line 60, in <module>
    MainFunction()
  File "/Users/python_class/PycharmProjects/homework4/homework4.py", line 9, in MainFunction
    second_print = PrintAddOneCityNumSentence(first_print)
  File "/Users/python_class/PycharmProjects/homework4/homework4.py", line 51, in PrintAddOneCityNumSentence
    first_print_list = first_print.split()
AttributeError: 'NoneType' object has no attribute 'split'

传递给函数的字符串是＆＃39;对象没有属性＆＃39;当使用split方法时

0 个答案: