question: Is Trainer.validate not available now in the latest version?
context: My code is like this:
  model = MyLitModel()
  trainer = Trainer(gpus=1)
  trainer.validate(model, dataloader)
  However, I got an AttributeError:
  AttributeError: type object 'Trainer' has no attribute 'validate'
answer: It's available in master!
  Note that your first call is using Trainer.validate not trainer.validate and that's why you get that error
  fixed:
  model = MyLitModel()
  trainer = Trainer(gpus=1)
  trainer.validate(model, dataloader)