Python与类的操作

Question

我正在使用Python 3编写类，但遇到了一些困难。我这里有两个程序（一个程序导入了另一个程序）。

我的想法是创建一个员工列表，并且有三种员工类型：按小时计薪的员工、固定薪资的员工和志愿者。

我发现我在每个类中的show_pay方法有问题。我还知道在我的固定薪资类中，我试图用一个字符串去除以一个整数，但我写的代码让我不太确定该怎么解决这个问题。

我的按小时计薪的类似乎没有打印到列表中。

谢谢你们的帮助。我对此感到很困惑，正在努力完成这个项目。

第一个项目（员工）

    #set global constant
    SHIFT_2 = 0.05
    SHIFT_3 = 0.10

    #person class
    class Person:
        #initialize name, ID number, city
        def __init__(self, name, ID, city):
            self.__ID = ID
            self.__name = name
            self.__city = city
        #display employee name
        def show_person(self):
            print('Name:', self.__name)
            print('ID:', self.__ID)
            print('City:', self.__city)
        #display salary
        def show_pay(self):
            print('I make lots of money')


        #return formatting     
        def __str__(self):
            name_string = '(My name is ' + self.__name +')'
            return name_string

    # Hourly employee class
    class Hourly(Person):
        #initialize method calls superclass
        def __init__(self, name, ID, city, base_pay, shift):
            Person.__init__(self, name, ID, city)
            self.__base_pay = base_pay
            self.__shift = shift

        #show_pay overrides the superclass and displays hourly pay rates
         def show_pay(self):
            if self.__shift == 1:
                print('My salary is ', self.__base_pay)
            elif self.__shift == 2:
                print('My salary is ', (self.__base_pay * SHIFT_2) + self.__base_pay)
            elif self.__shift == 3:
                print('My salary is ', (self.__base_pay * SHIFT_3) + self.__base_pay)

     #salary employee class
     class Salary(Person):
          #intialize method calls superclass
        def __init__(self, name, ID, city, ann_salary):
            Person.__init__(self, name, ID, city)
            self.__salary = ann_salary


        #show pay overrides superclass and displays salary pay rates
        def show_pay(self):
            print('I make ', self.__salary)
            print('which is ', self.__salary // 26, 'every two weeks.')


    #volunteer employee class
    class Volunteer(Person):
        def __init__(self, name, ID, city):
            Person.__init__(self, name, ID, city)

        def show_pay(self):
              print('I am a volunteer so I am not paid.')

这是主程序

    import employee

    def main():
        #create list
        employees = make_list()

        #display list
        print('Here are the employees.')
        print('-----------------------')

        display_list(employees)

    def make_list():
        #create list
        employee_list = []

        #get number of hourly employees
        number_of_hourly = int(input('\nHow many hourly will be entered? '))
        for hourly in range(number_of_hourly):
            #get input
            name, ID, city = get_input()

            base_pay = input('Enter employee base pay: ')

            shift = input('Enter employee shift 1,2, or 3: ')
            #create object
            Hourly = employee.Hourly(name, ID, city, base_pay, shift)
            #add object to list
            employee_list.append(Hourly)

        #get number of salary employees
        number_of_salary = int(input('\nHow many salary will be entered? '))
        for salary in range(number_of_salary):    
            #get input
            name, ID, city = get_input()

            ann_salary = input('Enter employee annual salary: ')
            #create object
            salary = employee.Salary(name, ID, city, ann_salary)
            #add object to list
            employee_list.append(salary)

        #get volunteers
        number_of_volunteers = int(input('\nHow many other volunteers will be entered? '))
        for volunteers in range(number_of_volunteers):
            #get info
            name, ID, city = get_input()       
            #create object
            volunteer = employee.Person(name, ID, city)
            #add object to list
            employee_list.append(volunteer)


        #invalid object
        employee_list.append('\nThis is invalid')
        #return employee_list
        return employee_list

    def get_input():
        #input name
        name = input("Employee's name: ")
        #validate
        while name == '':
            print('\n Name is required.  Try again.')
            name = input("Employee's name: ")

        ID_valid = False

        ID = input("Employee's ID: ")

        while ID_valid == False:

            try:
                ID = float(ID)
                if ID > 0:
                    ID_valid = True
                else:
                    print("\nID must be > 0.  Try again.")
                    ID = input("Employee's age: ")
            except ValueError:
                print("\nID must be numeric.  Try again.")
                ID = input("Employee's ID: ")

        #get city
        city = input("Enter employee's city of residence: ")

        #return values
        return name, ID, city



    def display_list(human_list):
        #create for loop for isinstance
        for human in human_list:
            #create isinstance
            if isinstance(human, employee.Person):

                print(human)

                human.show_person()

                human.show_pay()
                print
            else:
                print('Invalid employee object')

    #call main function
    main()

Answer 1

你输入的工资是以字符串的形式出现的。需要把它转换一下。

ann_salary = int(input('Enter employee annual salary: '))