def truncate(self, size=-1):
        raise NotImplementedError, 'PushbackFile is read-only'
Ensures that a directory exists.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/grizzled/grizzled/io/__init__.py/PushbackFile.truncate--crossover with--dataset/ETHPy150Open audreyr/cookiecutter/cookiecutter/utils.py/make_sure_path_exists