def enabled_package_list(self):
        return self._package_list.values()
Remove and return an item from the queue without blocking.
dataset/ETHPy150Open VisTrails/VisTrails/vistrails/core/packagemanager.py/PackageManager.enabled_package_list--crossover with--dataset/ETHPy150Open tornadoweb/tornado/tornado/queues.py/Queue.get_nowait