我无法显示按钮

Question

从tkinter导入* 根= Tk（） answer = StringVar（） disp = Entry（root，bg =“ blue”，font =（“ bold”，20），bd = 20，textvariable = answer.grid（row = 0，coloumnspan = 4） btn1 = Button（root，text =“ 1”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 1，coloumn = 0） btn2 = Button（root，text =“ 2”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 1，coloumn = 1） btn3 = Button（root，text =“ 3”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 1，coloumn = 2） btn4 = Button（root，text =“ 4”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 2，coloumn = 0） btn5 = Button（root，text =“ 5”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 2，coloumn = 1） btn6 = Button（root，text =“ 6”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 2，coloumn = 2） btn7 = Button（root，text =“ 7”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 3，coloumn = 0） btn8 = Button（root，text =“ 8”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 3，coloumn = 1） btn9 = Button（root，text =“ 9”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 3，coloumn = 2） btn0 = Button（root，text =“ 0”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 4，coloumn = 2） btn_add =按钮（root，text =“ +”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 1，coloumn = 3） btn_sub = Button（root，text =“-”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 2，coloumn = 3） btn_mul = Button（root，text =“ x”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 3，coloumn = 3） btn_div =按钮（root，text =“％”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 4，coloumn = 0） btn_equl =按钮（root，text =“ =”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 4，coloumn = 1） btn_clr =按钮（root，text =“ CLR”，padx = 10，bg =“ white”，fg =“ black”，font =（“ bold”，20））。grid（row = 4，coloumn = 3） root.mainloop（）

Answer 1

$ yarn --version 0.32 代替column，coloumn代替columnspan

Answer 2

仅使用column而不是coloumn和coloumnspan而不是columnspan

from tkinter import *
root = Tk()
answer = StringVar()
disp = Entry(root, bg="blue", font=("bold", 20), bd=20, textvariable=answer).grid(row=0, columnspan=4)
btn1 = Button(root, text="1", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=1, column=0)
btn2 = Button(root, text="2", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=1, column=1)
btn3 = Button(root, text="3", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=1, column=2)
btn4 = Button(root, text="4", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=2, column=0)
btn5 = Button(root, text="5", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=2, column=1)
btn6 = Button(root, text="6", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=2, column=2)
btn7 = Button(root, text="7", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=3, column=0)
btn8 = Button(root, text="8", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=3, column=1)
btn9 = Button(root, text="9", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=3, column=2)
btn0 = Button(root, text="0", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=4, column=2)
btn_add = Button(root, text="+", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=1, column=3)
btn_sub = Button(root, text="-", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=2, column=3)
btn_mul = Button(root, text="x", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=3, column=3)
btn_div = Button(root, text="%", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=4, column=0)
btn_equl = Button(root, text="=", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=4, column=1)
btn_clr = Button(root, text="CLR", padx=10, bg="white", fg="black", font=("bold", 20)).grid(row=4, column=3)
root.mainloop()

我总是喜欢这样分两步进行：

from tkinter import *
root = Tk()

answer = StringVar()

disp = Entry(root, bg="blue", font=("bold", 20), bd=20, textvariable=answer)
btn1 = Button(root, text="1", padx=10, bg="white", fg="black", font=("bold", 20))
btn2 = Button(root, text="2", padx=10, bg="white", fg="black", font=("bold", 20))
btn3 = Button(root, text="3", padx=10, bg="white", fg="black", font=("bold", 20))
btn4 = Button(root, text="4", padx=10, bg="white", fg="black", font=("bold", 20))
btn5 = Button(root, text="5", padx=10, bg="white", fg="black", font=("bold", 20))
btn6 = Button(root, text="6", padx=10, bg="white", fg="black", font=("bold", 20))
btn7 = Button(root, text="7", padx=10, bg="white", fg="black", font=("bold", 20))
btn8 = Button(root, text="8", padx=10, bg="white", fg="black", font=("bold", 20))
btn9 = Button(root, text="9", padx=10, bg="white", fg="black", font=("bold", 20))
btn0 = Button(root, text="0", padx=10, bg="white", fg="black", font=("bold", 20))
btn_add = Button(root, text="+", padx=10, bg="white", fg="black", font=("bold", 20))
btn_sub = Button(root, text="-", padx=10, bg="white", fg="black", font=("bold", 20))
btn_mul = Button(root, text="x", padx=10, bg="white", fg="black", font=("bold", 20))
btn_div = Button(root, text="%", padx=10, bg="white", fg="black", font=("bold", 20))
btn_equl = Button(root, text="=", padx=10, bg="white", fg="black", font=("bold", 20))
btn_clr = Button(root, text="CLR", padx=10, bg="white", fg="black", font=("bold", 20))

disp.grid(row=0, columnspan=4)
btn1.grid(row=1, column=0)
btn2.grid(row=1, column=1)
btn3.grid(row=1, column=2)
btn4.grid(row=2, column=0)
btn5.grid(row=2, column=1)
btn6.grid(row=2, column=2)
btn7.grid(row=3, column=0)
btn8.grid(row=3, column=1)
btn9.grid(row=3, column=2)
btn0.grid(row=4, column=2)
btn_add.grid(row=1, column=3)
btn_sub.grid(row=2, column=3)
btn_mul.grid(row=3, column=3)
btn_div.grid(row=4, column=0)
btn_equl.grid(row=4, column=1)
btn_clr.grid(row=4, column=3)

mainloop()