def get(self, key):

        return self.attrib[key]
Tests case that about half the files are cached and the worker is randomly
dataset/ETHPy150Open openstack/rack/rack/api/xmlutil.py/TemplateElement.get--crossover with--dataset/ETHPy150Open BD2KGenomics/toil/src/toil/test/src/jobFileStoreTest.py/JobFileStoreTest.testJobFileStoreWithMediumCacheAndBadWorker