带有列表并单独打印列表的类

Question

我在按顺序单独打印列表时遇到问题。你能告诉我我做错了什么以及如何解决这个问题吗？它只会打印出列表，而不是我想要打印出的实际值。

类定义

class Radio:
    radioStation = 0
    radioMap = ["STATIC", "97.2", "99.6", "101.7", "105.3", "108.5"]

    def __init__(self):
        self.preset1 = Radio.radioMap[0]
        self.preset2 = Radio.radioMap[0]
        self.preset3 = Radio.radioMap[0]
        ## save "STATIC" plus the 5 stations to a list, starting at the zero position
        ## set each of the 3 presets to STATIC (0 location in the list), as well as
        ##      the currently tuned in variable
        ## call the displayLCD method


    def seekNext(self):
        Radio.radioStation += 1
        for i in range(5):
            print(Radio.radioMap)
            self.displayLCD()
        ## add 1 to the currently tuned in variable
        ## if the currently turned in variable is greater then 5, set the currently tuned in variable to 1
        ## call the displayLCD melthod

    def longPressPreset1(self):
        self.preset1 = Radio.radioMap
        self.displayLCD()
        ## set preset1 variable to currently turned in 
        ## call the displayLCD melthod

    def longPressPreset2(self):
        self.preset2 = Radio.radioMap
        self.displayLCD()
        ## set preset2 variable to currently turned in
        ## call the displayLCD melthod

    def longPressPreset3(self):
        self.preset3 = Radio.radioMap
        self.displayLCD()
        ## set preset3 variable to the currently turned in
        ## call the displayLCD melthod

    def displayLCD(self):
        return print("\nCurrently tuned: ", Radio.radioMap)
        ## print the currently tuned in line using the currently turned in variable as the index into
        ## the station list

    def __str__(self):
        return "\nPreset 1: " + " " + str(self.preset1) + " " + "\nPreset 2: "+ " " + str(self.preset2) + " " + "\nPreset 3: " + " " + str(self.preset3)+ " " +"\nCurrently tuned: " + " " + str(Radio.radioMap)
        ## RETURN the three preset values and the currently turned in station in the
        ## required format AS A STRING

程序的主要功能

def main():
    myRadio = Radio()
    option = displayMenuGetOption()
    while option != "10":
        if option == "1":
            myRadio.displayLCD()
        elif option == "2":
            myRadio.longPressPreset1()
        elif option == "3":
            myRadio.longPressPreset2()
        elif option == "4":
            myRadio.longPressPreset3()
        elif option == "5":
            myRadio.seekNext()
        elif option == "6":
            myRadio.shortPressPreset1()
        elif option == "7":
            myRadio.shortPressPreset2()
        elif option == "8":
            myRadio.shortPressPreset3()
        elif option == "9":
            print(myRadio)
        option = displayMenuGetOption()

    def displayMenuGetOption():
    print("\n1 = Display tuned in station")
    print("2 = Program preset station 1")
    print("3 = Program preset station 2")
    print("4 = Program preset station 3")
    print("5 = Seek next station")
    print("6 = Tune preset station 1")
    print("7 = Tune preset station 2")
    print("8 = Tune preset station 3")
    print("9 = Dump Programming")
    print("10 = Turn off radio")
    return input("\nEnter option: ")

    main()
    input("\nRun complete. Press the Enter key to exit.")

这是打印出来的

['STATIC', '97.2', '99.6', '101.7', '105.3', '108.5']

Currently tuned:  ['STATIC', '97.2', '99.6', '101.7', '105.3', '108.5']
['STATIC', '97.2', '99.6', '101.7', '105.3', '108.5']

Currently tuned:  ['STATIC', '97.2', '99.6', '101.7', '105.3', '108.5']
['STATIC', '97.2', '99.6', '101.7', '105.3', '108.5']

Currently tuned:  ['STATIC', '97.2', '99.6', '101.7', '105.3', '108.5']
['STATIC', '97.2', '99.6', '101.7', '105.3', '108.5']

Currently tuned:  ['STATIC', '97.2', '99.6', '101.7', '105.3', '108.5']
['STATIC', '97.2', '99.6', '101.7', '105.3', '108.5']

Currently tuned:  ['STATIC', '97.2', '99.6', '101.7', '105.3', '108.5']

这就是我想要的样子

enter option: 1

Currently tuned: STATIC

enter option: 5

Currently tuned: STATIC

enter option: 5

Currently Tuned: 97.2

enter option: 2

Currently Tuned: 97.2

enter option: 5

Currently tuned: 99.6

enter option: 4

Currently tuned: 99.6

enter option: 6

Preset 1: 97.2
Preset 2: STATIC
Preset 3: 99.6
Currently tuned: 99.6

Answer 1

如果您只想显示当前电台，则在访问列表时需要使用电台号码作为索引。你的类也应该引用 self 而不是类名。

def displayLCD(self):
    return print("\nCurrently tuned: ", self.radioMap[self.radioStation])
    ## print the currently tuned in line using the currently turned in variable as the index into
    ## the station list