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class Menu:
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def __init__(self, values:list):
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self.values = values
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self.position = 0
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def go_up(self):
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self.position = max(0, self.position -1)
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def go_down(self):
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self.position = min(len(self.values)-1, self.position +1)
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def validate(self):
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return self.values[self.position] |