code: def test_trainer_loggers_setters():
      """Test the behavior of setters for trainer.logger and trainer.loggers."""
      logger1 = CustomLogger()
      logger2 = CustomLogger()
  
      trainer = Trainer()
      assert type(trainer.logger) is TensorBoardLogger
      assert trainer.loggers == [trainer.logger]
  
      # Test setters for trainer.logger
      trainer.logger = logger1
      assert trainer.logger == logger1
      assert trainer.loggers == [logger1]
  
      trainer.logger = None
      assert trainer.logger is None
      assert trainer.loggers == []
  
      # Test setters for trainer.loggers
      trainer.loggers = [logger1, logger2]
      assert trainer.loggers == [logger1, logger2]
  
      trainer.loggers = [logger1]
      assert trainer.loggers == [logger1]
      assert trainer.logger == logger1
  
      trainer.loggers = []
      assert trainer.loggers == []
      assert trainer.logger is None
  
      trainer.loggers = None
      assert trainer.loggers == []
      assert trainer.logger is None
  
imports: import pytest
  from lightning.pytorch import Trainer
  from lightning.pytorch.loggers import TensorBoardLogger
  from tests_pytorch.loggers.test_logger import CustomLogger
label_desc: Use image node_id 2 for calling a global function with example usage: test_trainer_loggers_setters() without return types