@property
    def num_revisions(self):
        return FileAttachment.objects.filter(
            attachment_history=self.attachment_history_id).count() - 1
Deserialize ``s`` (a ``str`` or ``unicode`` instance containing a JSON
dataset/ETHPy150Open reviewboard/reviewboard/reviewboard/attachments/models.py/FileAttachment.num_revisions--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-build/python-libs/python-twitter/simplejson/__init__.py/loads