def autocomplete(opts, sIn): options = set() size = len(sIn) for opt in opts: option = opt[:size] if option == sIn: options.add(opt) if len(options)==0: return None # This and the above line may be removed if you want to just check the size of the returned set. return options print(autocomplete(["test","test2","cat","bat"],"ca")) print() print(autocomplete(["test","test2","cat","bat"],"te")) print() print(autocomplete(["test","test2","cat","bat"],"tet"))
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