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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 get_deployment_count(self):
 """Utility function to get the number of deployments a given project has"""


        ret = self.stage_set.annotate(num_deployments=Count('deployment')).aggregate(total_deployments=Sum('num_deployments'))
        return ret['total_deployments']