python-3.x - 如何将此按钮与其上方的其他列对齐？

Question

所以我正在关注 Python 中关于 tkinter 的教程，我们正在制作一个基本的计算器，但我似乎无法让我的等号按钮与其他按钮相匹配，它要么太长，要么太短，或者最终改变了正上方按钮的大小。据我了解，网格系统之所以有效，是因为我理解的按钮位置是相对的。有没有办法来解决这个问题？

from tkinter import *

root = Tk()
root.title("Simple Calculator")

e = Entry(root, width=35, bg='white', fg='red', borderwidth=5)
# padx, pady add "padding" or space around the entry widget.
e.grid(row=0, column=0, columnspan=3, padx=10, pady=10)
# Button functions

def button_add():
    return

# Define the buttons
button_1 = Button(root, text='1', padx= 40, pady=20, command=button_add)
button_2 = Button(root, text='2', padx= 40, pady=20, command=button_add)
button_3 = Button(root, text='3', padx= 40, pady=20, command=button_add)
button_4 = Button(root, text='4', padx= 40, pady=20, command=button_add)
button_5 = Button(root, text='5', padx= 40, pady=20, command=button_add)
button_6 = Button(root, text='6', padx= 40, pady=20, command=button_add)
button_7 = Button(root, text='7', padx= 40, pady=20, command=button_add)
button_8 = Button(root, text='8', padx= 40, pady=20, command=button_add)
button_9 = Button(root, text='9', padx= 40, pady=20, command=button_add)
button_0 = Button(root, text='0', padx= 40, pady=20, command=button_add)
button_add = Button(root, text='+', padx= 39, pady= 20, command=button_add)
button_clear = Button(root, text='Clear', padx= 77, pady= 20, command=button_add)
button_equal = Button(root, text='=', padx= 87, pady= 20, command=button_add)

# Display the buttons on the screen.
button_1.grid(row=3, column=0)
button_2.grid(row=3, column=1)
button_3.grid(row=3, column=2)

button_4.grid(row=2, column=0)
button_5.grid(row=2, column=1)
button_6.grid(row=2, column=2)

button_7.grid(row=1, column=0)
button_8.grid(row=1, column=1)
button_9.grid(row=1, column=2)

button_0.grid(row=4, column=0)
button_clear.grid(row=4, column=1, columnspan=2)
button_add.grid(row=5, column=0)
button_equal.grid(row=5, column=1, columnspan=2)



root.mainloop()

标签： python-3.xtkinter