如何使tkinter按钮小部件占据整个网格宽度

Question

我试过this但没用。

我在做一个计算器程序。到目前为止我已经做到了：

from tkinter import *
window = Tk()

disp = Entry(window, state='readonly', readonlybackground="white")
disp.grid(column=0, row=0, columnspan=4)
#row 1
seven = Button(window, text="7", command=Seven)
seven.grid(column=1,row=1)

eight = Button(window, text="8", command=Eight)
eight.grid(column=2,row=1)

nine = Button(window, text="9", command=Nine)
nine.grid(column=3,row=1)

divide = Button(window, text="÷", command=Divide)
divide.grid(column=4,row=1)

#row 2

four = Button(window, text="4", command=Four)
four.grid(column=1,row=2)

five = Button(window, text="5", command=Five)
five.grid(column=2,row=2)

six = Button(window, text="6", command=Six)
six.grid(column=3,row=2)

multiply = Button(window, text="×", command=Multiply)
multiply.grid(column=4,row=2)

#row 3

one = Button(window, text="1", command=One)
one.grid(column=1,row=3)

two = Button(window, text="2", command=Two)
two.grid(column=2,row=3)

three = Button(window, text="3", command=Three)
three.grid(column=3,row=3)

minus = Button(window, text="-", command=Minus)
minus.grid(column=4,row=3)

#row 4

zero = Button(window, text="0", command=Zero)
zero.grid(column=1,row=4)

dec = Button(window, text=".", command=Dec)
dec.grid(column=2,row=4)

equal = Button(window, text="=", command=Equal)
equal.grid(column=3,row=4)

add = Button(window, text="+", command=Add)
add.grid(column=4,row=4)

window.mainloop()

这看起来像这样（我的声誉太低，无法发布图片）：https://i.imgsafe.org/268d2a57c1.jpg （编辑：图像链接已折旧）

我希望箱子同样宽，填满可用的空间。 结果应该类似于这样：http://python.6.x6.nabble.com/file/n4545517/skaiciavke.png

如何使按钮占据行/列的整个宽度？

Answer 1

两件事：

1. 将输入框设置为从列0开始应用，但随后的每一行都从列1开始操作。保持一致-你的7号按钮应该在0列，8号在1列等等
2. 当你用.grid按钮时，使用sticky=N+S+E+W。这将允许按钮按其各自的行和列大小展开。

更新： N+S+E+W不适用于python3.6.7，它是nesw或这4个字母的任意组合。

例如：

#!/usr/bin/python
# -*- coding: utf-8 -*-

from tkinter import *
window = Tk()

disp = Entry(window, state='readonly', readonlybackground="white")
disp.grid(column=0, row=0, columnspan=4)
#row 1
seven = Button(window, text="7")
seven.grid(column=0,row=1, sticky='nesw')

eight = Button(window, text="8")
eight.grid(column=1,row=1, sticky='nesw')

nine = Button(window, text="9")
nine.grid(column=2,row=1, sticky='nesw')

divide = Button(window, text="÷")
divide.grid(column=3,row=1, sticky='nesw')

window.mainloop()

返回一个如下所示的窗口：