Code:

import subprocess
from Tkinter import *

root = Tk()
root.title("Test")
background = "BLACK"
root.configure(bg=background , padx=10, pady=10)

def GasWicd():
  subprocess.call('xterm -e "service wicd stop"', shell=True)
  Status.insert(END,">>Gasim Wicd<<")
  return

def BriFajl():
  subprocess.call('rm  *.netxml *.csv', shell=True)
  Status.insert(END,">>Brisem Fajlove<<")
  return

Status = Text(root, background="BLACK" , foreground="GREEN" , width=35 , height=10 )
Status.grid(row = 10, rowspan=2 ,columnspan=2 )

GWicd=Button(root, text="Iskljuci Wicd" , width=40 ,bg="BLACK",fg="RED", command=GasWicd).grid(rowspan=2 ,columnspan=2 , sticky=W  ,  padx=5 , pady=1)

PFajl=Button(root, text="Obrisi Fajlove" , width=40 ,bg="BLACK",fg="RED",  command=BriFajl).grid(rowspan=2 ,columnspan=2 , sticky=W,  padx=5 , pady=1)

root.mainloop()