code: def wait_ready(self, name, timeout=5.0, sleep_interval=0.2):
          
          end = time() + timeout
          while True:
              try:
                  info = self.bucket_info(name).value
                  for node in info['nodes']:
                      if node['status'] != 'healthy':
                          raise NotReadyError.pyexc('Not all nodes are healthy')
                  return  # No error and all OK
              except E.CouchbaseError:
                  if time() + sleep_interval > end:
                      raise
                  sleep(sleep_interval)
docs: Wait for a newly created bucket to be ready.
  
          :param string name: the name to wait for
          :param seconds timeout: the maximum amount of time to wait
          :param seconds sleep_interval: the number of time to sleep
              between each probe
          :raise: :exc:`.CouchbaseError` on internal HTTP error
          :raise: :exc:`NotReadyError` if all nodes could not be
              ready in time