code.dump();

“A generator and a list used like a cache.”

class GeneratorList(object):

    def __init__(self, generator):
        self.__generator = generator
        self.__list = []

    def __getitem__(self, index):
        for _ in range(index - len(self.__list) + 1):
            self.__list.append(self.__generator.next())
        return self.__list[index]