使用变量确定要使用的数组

在 Python 中，有一个有趣的项目需要完成。这个项目的功能是将数字转换为单词（英语和毛利语），例如，当用户点击“1”时，屏幕上的图像会根据下拉列表中选择的语言而改变，当选择英语时变为“one”，当选择毛利语时变为“tahi”。为此，需要创建两个列表，分别对应每种语言（仅使用数字 1-10），然后根据用户在下拉列表中点击的语言，将相应的列表传递给 number_converter 函数。

2、解决方案

为了解决这个问题，可以使用一个变量来代替 number_converter 函数中的两个列表名称。当用户在下拉列表中选择一种语言时，该变量将被替换为所选列表的名称。这样，number_converter 函数就可以根据变量的值来确定要使用的列表。

代码示例

import tkinter, sys

class newpulldownlist:
  def __init__ (self, parent, valuearray, cmd):
    self.options = valuearray
    self.listvariable = tkinter.StringVar()
    self.listvariable.set(valuearray[0])
    self.guilist = tkinter.OptionMenu(parent, self.listvariable, *valuearray, command = cmd)
    self.guilist.configure(width = "0")
    self.guilist.pack()

  def value(self):
    return self.listvariable.get()

  def changevalue(self, tothis):
    self.listvariable.set(tothis)

class newbutton:
  def __init__ (self, parent, x, y, label, cmd):
    self.width = x
    self.height = y
    self.label = label
    self.guibut = tkinter.Button(parent, width = x, height = y, text = label, command = cmd)
    self.guibut.pack(side = "left")

def number_select(n):
  global language
  print("You pressed", n, ".")
  picture.delete('all')
  newpic = picture.create_image(602, 2, image = language[n], anchor = "n")

def select(self):
  options = lang_list.value()
  print(lang_list.value())

appwindow = tkinter.Tk()
appwindow.title("Number Converter")

rightside = tkinter.Frame(appwindow)
rightside.pack(side = tkinter.RIGHT)

topside = tkinter.Frame(appwindow)
topside.pack(side = tkinter.TOP)

bottomside = tkinter.Frame(appwindow)
bottomside.pack(side = tkinter.BOTTOM)

picture = tkinter.Canvas(topside, width = 1200, height = 70, bg = "white")
picture.pack()

# Arrays for each language.

options = ['English', 'Maori']

maori = []
maori.append(tkinter.PhotoImage(file = "Title_1.gif"))
maori.append(tkinter.PhotoImage(file = "1_Tahi.gif"))
maori.append(tkinter.PhotoImage(file = "2_Rua.gif"))
maori.append(tkinter.PhotoImage(file = "3_Toru.gif"))
maori.append(tkinter.PhotoImage(file = "4_Wha.gif"))
maori.append(tkinter.PhotoImage(file = "5_Rima.gif"))
maori.append(tkinter.PhotoImage(file = "6_Ono.gif"))
maori.append(tkinter.PhotoImage(file = "7_Whitu.gif"))
maori.append(tkinter.PhotoImage(file = "8_Waru.gif"))
maori.append(tkinter.PhotoImage(file = "9_Iwa.gif"))
maori.append(tkinter.PhotoImage(file = "10_Tekau.gif"))

english = []
english.append(tkinter.PhotoImage(file = "Title_1.gif"))
english.append(tkinter.PhotoImage(file = "1.gif"))
english.append(tkinter.PhotoImage(file = "2.gif"))
english.append(tkinter.PhotoImage(file = "3.gif"))
english.append(tkinter.PhotoImage(file = "4.gif"))
english.append(tkinter.PhotoImage(file = "5.gif"))
english.append(tkinter.PhotoImage(file = "6.gif"))
english.append(tkinter.PhotoImage(file = "7.gif"))
english.append(tkinter.PhotoImage(file = "8.gif"))
english.append(tkinter.PhotoImage(file = "9.gif"))
english.append(tkinter.PhotoImage(file = "10.gif"))

lang_list = newpulldownlist(appwindow, options, cmd = select)

language = lang_list.value()

if language == 'Maori':
  language = maori
  print("Maori")
elif language == 'English':
  language = english
  print("English")

startpic = picture.create_image(602, 2, image = language[0], anchor = "n")

# Buttons
one = newbutton(bottomside, 12, 1, "1", cmd = lambda n=1: number_select(n))
two = newbutton(bottomside, 12, 1, "2", cmd = lambda n=2: number_select(n))
three = newbutton(bottomside, 12, 1, "3", cmd = lambda n=3: number_select(n))
four = newbutton(bottomside, 12, 1, "4", cmd = lambda n=4: number_select(n))
five = newbutton(bottomside, 12, 1, "5", cmd = lambda n=5: number_select(n))
six = newbutton(bottomside, 12, 1, "6", cmd = lambda n=6: number_select(n))
seven = newbutton(bottomside, 12, 1, "7", cmd = lambda n=7: number_select(n))
eight = newbutton(bottomside, 12, 1, "8", cmd = lambda n=8: number_select(n))
nine = newbutton(bottomside, 12, 1, "9", cmd = lambda n=9: number_select(n))
ten = newbutton(bottomside, 12, 1, "10", cmd = lambda n=10: number_select(n))

quitbutton = newbutton(bottomside, 12, 1, "Quit", cmd = sys.exit)

appwindow.mainloop()

在上面的代码中，通过在 number_converter 函数中使用一个名为 language 的全局变量，成功地解决了在两个列表之间切换的问题。language 变量的值由下拉列表中的选择决定，并在每次选择更改时进行更新。这样，number_converter 函数就可以根据 language 的值来确定要使用的列表。