def _check_writable(self):

        if not self._iswritable():
            raise FileModeError("the file is not writable")
Allows plugins to process an item model before it is saved.
dataset/ETHPy150Open PyTables/PyTables/tables/file.py/File._check_writable--crossover with--dataset/ETHPy150Open IanLewis/django-lifestream/lifestream/plugins/__init__.py/FeedPlugin.post_process