Label(..., text= x)將只顯示一次-在開始處。在

您必須使用StringVar來完成您期望的操作x_var = StringVar()

Label(..., texvariable=x_var)

現在您可以在x_var中設置值，以自動在Label中設置新文本

^{pr2}$

順便說一句：不是

^{3}$

也許你該這么做x = list(d.keys())

或者甚至x = list(d)

編輯：按“顯示”按鈕時顯示所有鍵(如代碼中所示)import sys

from Tkinter import *

import ttk

import time

from datetime import datetime

# - functions

def quit():

print("Have a great day! Goodbye :)")

sys.exit(0)

def display():

x_var.set( list(d) )

def add(*args):

global stock

global d

stock = stock_Entry.get()

Quantity = Quantity_Entry.get()

if stock not in d:

d[stock] = Quantity

else:

d[stock] += Quantity

# - main -

x = list()

d = dict()

now = datetime.now()

root = Tk()

root.title("Homework 5 216020088")

x_var = StringVar()

mainframe = ttk.Frame(root, padding="6 6 20 20")

mainframe.grid(column=0, row=0, sticky=(N, W, E, S))

ttk.Label(mainframe, text="you are accesing this on day %s of month %s of %s" % (now.day,now.month,now.year)+" at exactly %s:%s:%s" % (now.hour,now.minute,now.second), foreground="yellow", background="Black").grid(column=0, row = 0)

stock_Entry= ttk.Entry(mainframe, width = 60, textvariable="stock")

stock_Entry.grid(column=0, row = 1, sticky=W)

ttk.Label(mainframe, text="Please enter the stock name").grid(column=1, row = 1, sticky=(N, W, E, S))

Quantity_Entry= ttk.Entry(mainframe, width = 60, textvariable="Quantity")

Quantity_Entry.grid(column=0, row = 2, sticky=W)

ttk.Label(mainframe, text="Please enter the quantity").grid(column=1, row = 2, sticky=(N, W, E, S))

ttk.Button(mainframe, text="Add", command=add).grid(column=0, row=3, sticky=W)

ttk.Button(mainframe, text="Display", command=display).grid(column=0, row=3, sticky=S)

ttk.Button(mainframe, text="Exit", command=quit).grid(column=0, row=3, sticky=E)

ttk.Label(mainframe, textvariable=x_var).grid(column=0, row= 4, sticky=W)

for child in mainframe.winfo_children(): child.grid_configure(padx=5, pady=5)

root.mainloop()

總結

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