markusthoemmes commented on a change in pull request #3382: Cleanup script for 
unused entities in the whisks database.
URL: 
https://github.com/apache/incubator-openwhisk/pull/3382#discussion_r172871483
 
 

 ##########
 File path: tools/db/cleanUpWhisks.py
 ##########
 @@ -0,0 +1,150 @@
+#!/usr/bin/env python
+"""Python script to delete whisks entries having none existent ns.
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+"""
+
+import argparse
+import time
+import couchdb.client
+
+skipWhisks = 0
+
+try:
+    long        # Python 2
+except NameError:
+    long = int  # Python 3
+
+HOUR = 1000 * 60 * 60
+DAY = HOUR * 24
+
+#
+# simple ring buffer like list
+#
+class SimpleRingBuffer:
+    def __init__(self, size):
+        self.index = -1
+        self.data = []
+        self.maxsize = size * 2
+
+    def append(self, ns, bool):
+
+        self.index=(self.index+2)%self.maxsize
+
+        if len(self.data) < self.maxsize:
+            self.data.append(ns)
+            self.data.append(bool)
 
 Review comment:
   Python?supports tuples. Should we store tuples of (String, Boolean) instead 
of relying on a fixed order here?

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