code: def test_checkpoint_callback_file_path_setter():
      new_checkpoint_callback = callback.CheckpointCallback()
  
      try:
          new_checkpoint_callback.file_path = 1
      except:
          new_checkpoint_callback.file_path = "out"
  
      assert new_checkpoint_callback.file_path == "out"
  
file_path: opytimizer/tests/opytimizer/utils/test_callback.py
imports: from opytimark.markers.n_dimensional import Sphere
  from opytimizer.core import function
  from opytimizer.optimizers import swarm
  from opytimizer.opytimizer import Opytimizer
  from opytimizer.spaces import search
  from opytimizer.utils import callback
label_desc: Use image node_id 6 for calling a global function with example usage: test_checkpoint_callback_file_path_setter() without return types