from tkinter import *

def a():

a=(entry1.get())

s=""

for i in a:

b=a.index(i)

i=int(i)

if i>=4:

bai="1"

if i-4>=2:

shi="1"

ge=str(i-6)

elif i-4<2:

shi="0"

ge=str(i-4)

elif 2<=i<4:

if b==0:

bai=""

shi="1"

ge=str(i-2)

elif b!=0:

bai="0"

shi="1"

ge=str(i-2)

elif i<2:

if b==0:

bai=""

shi=""

ge=str(i)

elif b!=0:

bai="0"

shi="0"

ge=str(i)

c=bai+shi+ge

s=s+c

label1.config(text="{}(八进制）={}(二进制）".format(a,s))

top=Tk()

top.geometry("300x400")

label1=Label(top,text="八进制转二进制")

label1.pack()

entry1=Entry(top,text=0)

entry1.pack()

button1=Button(top,text="转换",command=a)

button1.pack()

top.mainloop()