code: def test_manager_host_invalid(self):
      manager = PerspectiveManager()
      with raises(PerspectiveError):
          manager.host({})
  
imports: import json
  import time
  import numpy
  import pyarrow
  from datetime import datetime
  from functools import partial
  from pytest import raises
  from perspective import Table, PerspectiveError, PerspectiveManager
label_desc: Use image node_id 4 for calling the TestPerspectiveManager obj's underlying member method code with example usage: obj.test_manager_host_invalid() without return types