如何将多个用户输入保存到 Python tkinter 中的变量中？

Question

我正在使用 Tkinter 制作一个愚蠢的计算器，并且我有一个名为“短语”的全局变量。所以基本上，我有按钮（无意义的名称），我只想加/减并打印出句子，例如“香蕉”+“牛奶”=“香蕉牛奶！”但是我很难将用户的输入保存到全局变量“短语”中。以下是我的代码：

from tkinter import *

phrase = ''


# To press any button
def press(item):
    global phrase
    if item == 'Banana':
        phrase = 'This is yellow'
    elif item == 'Milk':
        phrase = 'This is white'
    return equation.set(phrase)

############################### Here is the fucntion adding together
def recipe(item):
    global phrase
    if item == 'AND':
        phrase = phrase + ' ' + str(item)
        equation.set(phrase)



# Driver code
if __name__ == '__main__':
    # create application window
    app = Tk()

    # title
    app.title("Silly Calculator")

    # geometry
    app.geometry('290x162')

    # background color
    app.configure(bg='pink')

    equation = StringVar()
    windows = Entry(app, textvariable=equation)
    windows.grid(columnspan=5, ipadx=100, ipady=10)
    equation.set('Listen to your Funculator!')

    # Create buttons and other accessories
    button1 = Button(app, text='Banana', fg='yellow', bg='purple',
                     command=lambda: press('Banana'), height=2, width=10)
    button1.grid(row=2, column=0, sticky="NSEW")

    button2 = Button(app, text='Milk', fg='brown', bg='pink',
                     command=lambda: press('Milk'), height=2, width=10)
    button2.grid(row=2, column=1, sticky="NSEW")

    plus = Button(app, text='AND', fg='black', bg='white',
                  command=lambda: recipe('AND'), height=2, width=10)
    plus.grid(row=4, column=0, sticky="NSEW")

# start the GUI
app.mainloop()

所以我尝试将全局变量 phase 设置为列表 []，并可能通过索引号访问。但这不起作用，我只将最后一个用户输入保存到“短语”中。有没有办法可以保存在不同的变量中，例如短语_1、短语_2，以便我可以在以下情况下使用它们：

# This is enter
def recipe(item):
    global phrase
    if item == 'AND':
        phrase = phrase_1 + phrase_2
        equation.set(phrase)

像这样？

任何建议将不胜感激！

Answer 1

这样的？还是我没有理解正确？

from tkinter import *

phrase = []
phrase_string = ''


# To press any button
def press(item):
    global phrase_string
    global phrase

    if item == 'Banana':
        phrase.append(' Banana')
    elif item == 'Milk':
        phrase.append(' Milk')
    elif item == 'AND':
        phrase.append(' and')

    phrase_string = ''
    for ele in phrase:
        phrase_string += ele

    equation.set(phrase_string)



# Driver code
if __name__ == '__main__':
    # create application window
    app = Tk()

    # title
    app.title("Silly Calculator")

    # geometry
    app.geometry('290x162')

    # background color
    app.configure(bg='pink')

    equation = StringVar()
    windows = Entry(app, textvariable=equation)
    windows.grid(columnspan=5, ipadx=100, ipady=10)

    # Create buttons and other accessories
    button1 = Button(app, text='Banana', fg='yellow', bg='purple',
                     command=lambda: press('Banana'), height=2, width=10)
    button1.grid(row=2, column=0, sticky="NSEW")

    button2 = Button(app, text='Milk', fg='brown', bg='pink',
                     command=lambda: press('Milk'), height=2, width=10)
    button2.grid(row=2, column=1, sticky="NSEW")

    plus = Button(app, text='AND', fg='black', bg='white',
                  command=lambda: press('AND'), height=2, width=10)
    plus.grid(row=4, column=0, sticky="NSEW")

    app.mainloop()