def db_for_read(self, model, **hints):
        return DEFAULT_DB_ALIAS if this_thread_is_pinned() else get_slave()
Test find nodes with attribute having value.
dataset/ETHPy150Open mozilla/inventory/vendor-local/src/django-multidb-router/multidb/__init__.py/PinningMasterSlaveRouter.db_for_read--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/words/test/test_xpath.py/XPathTest.test_attributeWithValueAny