Quick and dirty eth0 interface toggling GUI for testing purposes

Eth0_interface_manager

from Tkinter import *
from subprocess import check_output
import ttk, os, sys

def disableConnection():
	global currentstatus
	try:
		os.popen('sudo ifdown eth0', 'r', 1)
		print 'Connection disabled'
		currentstatus.set('down')
	except ValueError:
	       pass

def enableConnection():
	global w
	try:
		os.popen('sudo ifup eth0', 'r', 1)
		print 'Connection enabled'
		currentstatus.set('up')
	except ValueError:
		pass
    
def toggle(*args):	
	try:		
		status = getInterfaceStatus()
		if 'up' in status:
			print 'Up so disabling'
			disableConnection()			
		else:
			print 'Up so enabling'
			enableConnection()			
	except ValueError:
		pass

def getInterfaceStatus():
	f = open("/sys/class/net/eth0/operstate", "r")
	status = f.read()
	f.close()
	return status		

# main
master = Tk()
master.wm_title("Eth0 Interface Mgmt")

f = Frame(master, height=100, width=250, padx=10, pady=10)
f.pack_propagate(0) # don't shrink
f.pack()

b = Button(f, text="Toggle interface", padx=10, pady=10, command=toggle)
b.pack()

currentstatus = StringVar()
currentstatus.set(getInterfaceStatus())

w = Label(f, textvariable=currentstatus)
w.pack()

mainloop()