def save(self, *args, **kwargs):
        if not self.creation_date:
            self.creation_date = now()

        super(Dataset, self).save(*args, **kwargs)
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dataset/ETHPy150Open pandaproject/panda/panda/models/dataset.py/Dataset.save--crossover with--dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/imaplib.py/IMAP4.close