try:
    credentials = service_account.Credentials.from_service_account_info(self.kGoogleServiceAccountJson)
    publisher = googleapiclient.discovery.build('androidpublisher', 'v2', credentials=credentials)
    request = publisher.purchases().products().get(productId=sku.lower(), packageName=self.kGooglePackageName, token=receipt)
    purchase = request.execute()
    # logic to handle purchase response here...
except googleapiclient.errors.HttpError as err:
    # logic to handle bad purchases here...
except Error as e:
    # logic to handle other errors here...