code: def test_space_agents_setter():
      new_space = space.Space()
  
      try:
          new_space.agents = None
      except:
          new_space.agents = []
  
      assert new_space.agents == []
  
imports: import numpy
  import pytest
  from opytimizer.core import agent, space
label_desc: Use image node_id 8 for calling a global function with example usage: test_space_agents_setter() without return types