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+from cmd import Cmd
+# using ``do_`` methods
+
+class Pirate(Cmd):
+ gold = 3
+ def do_loot(self, arg):
+ 'Seize booty from a passing ship.'
+ self.gold += 1
+ print('Now we gots {0} doubloons'
+ .format(self.gold))
+ def do_drink(self, arg):
+ 'Drown your sorrrows in rrrum.'
+ self.gold -= 1
+ print('Now we gots {0} doubloons'
+ .format(self.gold))
+
+pirate = Pirate()
+pirate.cmdloop()