Resetting generator object in Python

I have a generator object returned by multiple yield. Preparation to call this generator is rather time-consuming operation. That is why I want to reuse the generator several times.

y = FunctionWithYield()
for x in y: print(x)
#here must be something to reset 'y'
for x in y: print(x)

Of course, I’m taking in mind copying content into simple list. Is there a way to reset my generator?

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