code: def wait(n):
      import time
  
      time.sleep(n)
      return n
  
file_path: ipyparallel/ipyparallel/tests/test_executor.py
imports: import time
  from ipyparallel.client.view import LazyMapIterator, LoadBalancedView
  from .clienttest import ClusterTestCase
label_desc: Use image node_id 1 for calling a global function with example usage: wait(n) and returns: n