python tkinter）如何命令按钮回调类？

Question

我希望圣诞老人按钮在单击d_day类时回调我的d_day类，但我不确定该怎么做。 以下是到目前为止我得到的源代码！ 我已经运行了，但是什么也没有发生..没有运行，没有任何错误。 谁能告诉我问题出在哪里？ 非常感谢！

from Tkinter import *
import random
import datetime

root = Tk()

class D_day:
    def __init__(self, root, time):   
        self.root = root
        self.frame = Frame(self.root)
        self.dDay = datetime.datetime.strptime(time, "%m/%d/%y")
        self.calDays = Label(self.frame)
        self.count = Button(self.frame, text="Countdown", background='green', command=lambda:self.root.after(1000, self.update))
        self.daysLabel = Label(self.frame, text="Days left until (mm/dd/yy):")
        self.dDayE = Entry(self.frame)
        self.dDayE.insert(0, time)
        self.frame.grid()
        self.calDays.grid(row=1,column=1, columnspan=3)
        self.count.grid(row=2, column=1, rowspan=2)
        self.daysLabel.grid(row=2, column=2)
        self.dDayE.grid(row=3, column=2)

    def update(self):
        remaining = self.dDay-datetime.datetime.now()
        daysRemaining = remaining.days
        self.calDays.config(text="HoHoHo {days} days until Christmas!".format(days=daysRemaining))
        self.root.after(1000, self.update)

d = D_day(root, "12/25/13")


c = Canvas(root, width=500, height=400, background='black')
c.create_text(250, 90, text="Merry Christmas", font='Times 28 bold italic', fill='red')
c.create_text(250, 130, text="and", font='Times 15 bold italic', fill='white')
c.create_text(250, 170, text="Happy New Year", font='Times 28 bold italic', fill='green')
c.pack()

flake = []
for i in range(80):
    flake.append(c.create_text(random.randrange(500), random.randrange(400), text="*", fill='white', font='Times 27'))

santa = Button(root, text = "Click me!", foreground = 'red', compound = TOP, command=d)
photo = PhotoImage(file = "C:/Users/admin/Desktop/python/santa.gif")
santa.config(image = photo, width = 90, height = 140)
santa_window = c.create_window(250, 350, anchor = S, window=santa)

root.mainloop()

Answer 1

修改以下模板以满足您的需求：

class D_day:
    def __init__(self, root):   
        self.root = root
        c = Canvas(self.root, width=500, height=400, background='black')
        c.create_text(250, 90, text="Merry Christmas", font='Times 28 bold italic', fill='red')
        c.create_text(250, 130, text="and", font='Times 15 bold italic', fill='white')
        c.create_text(250, 170, text="Happy New Year", font='Times 28 bold italic', fill='green')
        c.pack()
        santa = Button(self.root, text="Click me!", command=self.santa_click)
        santa_window = c.create_window(200, 300, anchor=NW, window=santa)

    def santa_click(self):
        print "You clicked me!\n"

root = Tk()
root.title("D Day Test")
d_day = D_day(root)
root.mainloop()

修改santa_click方法以更改行为。 我让你来做那个。