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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def should_recover(self):
 """Returns whether the trial qualifies for restoring. This is if a checkpoint frequency is set and has not failed more than max_failures. This may return true even when there may not yet be a checkpoint. """

        return (self.checkpoint_freq > 0
                and (self.num_failures < self.max_failures
                     or self.max_failures < 0))