import sys
def exit():
	print "Exiting..."
	sys.exit(0);
"Interactive User Input Loop"
try:
	while 1:
		a = raw_input("ds> ")
		if a == "ls":
			print "Get Data Sources"
		elif a == "exit":
			exit()
		elif a == "quit":
			exit()
except EOFError, e:
	"For CTRL-D"
	print ""
	exit()
except KeyboardInterrupt, e:
	"For CTRL-C"
	print ""
	exit()