File util.py of Package test1

# cls -> Limpia la pantalla

def cls():
	import os
	if os.name == "nt":
		os.system("cls")
	elif os.name == "posix":
		os.system("clear")
	else:
		raise "No se puede limpiar la pantalla"
		print "<-No se pudo borrar la pantalla->" 
		
def elimina_duplicados(mylist):
	if mylist:
		mylist.sort()
		last = mylist[-1]
		for i in range(len(mylist)-2, -1, -1):
			if last == mylist[i]:
				del mylist[i]
			else:
				last = mylist[i]
		return mylist
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