Question

我已经尝试了一段时间，但我似乎无法在标签中显示字典的内容。我想点击显示按钮，当我这样做时，我想要显示我字典中的所有内容，请参阅下面的代码：

 import sys
from tkinter import *
from tkinter import ttk
import time
from datetime import datetime
now= datetime.now()
x = []
d = dict()
def quit():
    print("Have a great day! Goodbye :)")
    sys.exit(0)
def display():
    for key in d.keys():
        x.append(key)
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




root = Tk()
root.title("Homework 5 216020088")

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, text= x).grid(column=0, row= 4, sticky=W)

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

Answer 1

Label(..., text= x)只会在开头显示一次。

您必须使用StringVar来做您期望的事情

x_var = StringVar()
Label(..., texvariable=x_var)

现在，您可以在x_var中设置值，以便在Label

中自动设置新文字

x_var.set( x )

BTW：而不是

for key in d.keys():
    x.append(key)

可能你应该做

x = list(d.keys())

或者甚至

x = list(d)

编辑：按下按钮＆＃34;显示＆＃34;

时显示所有按键（如代码中所示）

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()

在python tkinter中的标签中显示字典内容

1 个答案: