new_contents: #!/usr/bin/env python
  
  import contextlib
  import os
  import re
  import sys
  
  top_dir = os.path.abspath(os.path.join(os.path.dirname(__file__),
                                         os.pardir))
  sys.path.insert(0, top_dir)
  
  from taskflow.utils import kazoo_utils
  
  
  @contextlib.contextmanager
  def finalize_client(client):
      try:
          yield client
      finally:
          kazoo_utils.finalize_client(client)
  
  
  def iter_children(client, path):
      if client.exists(path):
          for child_path in client.get_children(path):
              if path == "/":
                  child_path = "/%s" % (child_path)
              else:
                  child_path = "%s/%s" % (path, child_path)
              yield child_path
              for child_child_path in iter_children(client, child_path):
                  yield child_child_path
  
  
  def main():
      conf = {}
      if len(sys.argv) > 1:
          conf['hosts'] = sys.argv[1:]
      with finalize_client(kazoo_utils.make_client(conf)) as client:
          client.start(timeout=1.0)
          children = list(iter_children(client, "/taskflow"))
          for child_path in reversed(children):
              if not re.match(r"^/taskflow/(.*?)-test/(.*)$", child_path):
                  continue
              print("Deleting %s" % child_path)
              client.delete(child_path)
  
  
  if __name__ == "__main__":
      main()
  
subject: Add a helper tool which clears zookeeper test dirs