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Prahallad Achar <acharbly at gmail.com> writes: > How to implement reverse generator A generator generates a sequence of values. The notion "reverse generator" suggests that you have a sequence of values and want to produce it in reverse order. This is not always possible. Consider: def natural(): i = 0 while True: yield i; i += 1 This generator generates all natural numbers (up to the memory limit). However, there is no "reverse generator" for the sequence of natural numbers. If you have a finate sequence of values, you can turn it into a list, reverse this list and iterate over it. This will give you a reverse generator for your sequence of values (though maybe an inefficient one).

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