code: def select_backend(name):
      """Select the pyzmq backend"""
      try:
          mod = __import__(name, fromlist=public_api)
      except ImportError:
          raise
      except Exception as e:
          import sys
          from zmq.utils.sixcerpt import reraise
  
          exc_info = sys.exc_info()
          reraise(
              ImportError,
              ImportError("Importing %s failed with %s" % (name, e)),
              exc_info[2],
          )
  
      ns = {}
      for key in public_api:
          ns[key] = getattr(mod, key)
      return ns
  
label_desc: Use image node_id 1 for calling a global function with example usage: select_backend(name) and returns: ns