import tkinter as tk

window = tk.Tk()

window.title('计算器')

window.geometry('360x435')

window.attributes("-alpha", 0.95)

window.resizable(0, 0)#窗口大小固定，不能缩放

var = tk.StringVar()

frm_1 = tk.Frame(window, width=360, height=115, bg='CadetBlue').place(x=0, y=0, anchor=tk.NW)#数字显示区

frm_2 = tk.Frame(window, width=270, height=240, bg='DarkSeaGreen').place(x=0, y=115, anchor=tk.NW)#数字键盘

frm_3 = tk.Frame(window, width=90, height=320, bg='Beige').place(x=270, y=115, anchor=tk.NW)#加减乘除

frm_4 = tk.Frame(window, width=270, height=80, bg='CadetBlue').place(x=0, y=355, anchor=tk.NW)#不可循环输出的

var_result = tk.StringVar()

var_dian=tk.StringVar()

var_dian.set('.')

def name(u):

u='var'+str(u)

return u

#数字显示区

I = tk.Entry(frm_1,textvariable=var_result,font=('Arial',40),bg='grey')

I.place(x=0,y=0,width=360,height=115)

#获取数字显示区的文字

#函数部分

#计算结果的

def show_result():

result = I.get()

print(eval(result))

def delete():

f.delete(1.0, tk.END)

def get():

pass

num=1

#数字键盘，可循环显示的

for j in range(3):

for i in range(3):

m=0+(i)*90

n=115+(j)*80

b=tk.Button(frm_2,text=num,bg='WhiteSmoke',font=('Arial','20'),command=get)

b.place(x=m,y=n,width=90,height=80)

num=num+1

#数字键盘，不可循环显示的

v=0

a=tk.Button(frm_4,textvariable=var_dian,bg='Gainsboro',font=('20')).place(x=0,y=355,width=90,height=80)

b=tk.Button(frm_4,text='=',bg='Gainsboro',font=('20'),command=show_result).place(x=180,y=355,width=90,height=80)

f=tk.Button(frm_4,text='0',bg='WhiteSmoke',font=('Arial','20')).place(x=90,y=355,width=90,height=80)

#加减乘除

q=0

for p in ['+','-','*','/']:

e=tk.Button(frm_3,text=p,bg='Gainsboro',font=('20')).place(x=270,y=115+q*80,width=90,height=80)

q=q+1

window.mainloop()