title: How to add children node data update watch in Python using kazoo package
body: <p>I want to add watch on all children nodes of a node in Python using kazoo client but <code>ChildrenWatch</code> only watches for child add or remove not for data update of any child node. I am searching for a simple recipe which does this task.</p>
  
  <p>Sample code will be like this </p>
  
  <pre><code>from kazoo.client import KazooClient
  
  zk = KazooClient(hosts='127.0.0.1:2181')
  zk.start()
  
  @zk.SomeRecipe("/root")
  def watch_children_update(event):
      print("Updated child at path:%s data:%s stat:%s" % event.path, event.data, event.stat)
  </code></pre>