def cache_clear():
            """Clear the cache and cache statistics"""
            with lock:
                cache.clear()
                root = nonlocal_root[0]
                root[:] = [root, root, None, None]
                stats[:] = [0, 0]
Clear the cache and cache statistics
recipes/Python/578078_Py26_Py30_backport_Pyth33s_LRU/recipe-578078.py