KFold cross validation example: Trainer has no attribute 'strategy'

[KevinCrp]

🐛 Bug

I'm trying the K-Fold cross-validation example from pl_examples.
When I run the example, there is an error
AttributeError: 'Trainer' object has no attribute 'strategy'

`Traceback (most recent call last):

File "test_kflod.py", line 281, in
trainer.fit(model, datamodule)

File "/home/[USER]/[PATH]/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 740, in fit
self._call_and_handle_interrupt(

File "/home/[USER]/[PATH]/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 685, in _call_and_handle_interrupt
return trainer_fn(*args, **kwargs)

File "/home/[USER]/[PATH]/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 777, in _fit_impl
self._run(model, ckpt_path=ckpt_path)

File "/home/[USER]/[PATH]/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 1199, in _run
self._dispatch()

File "/home/[USER]/[PATH]/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 1279, in _dispatch
self.training_type_plugin.start_training(self)

File "/home/[USER]/[PATH]/lib/python3.8/site-packages/pytorch_lightning/plugins/training_type/training_type_plugin.py", line 202, in start_training
self._results = trainer.run_stage()

File "/home/[USER]/[PATH]/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 1289, in run_stage
return self._run_train()

File "/home/[USER]/[PATH]/lib/python3.8/site-packages/pytorch_lightning/trainer/trainer.py", line 1319, in _run_train
self.fit_loop.run()

File "/home/[USER]/[PATH]/lib/python3.8/site-packages/pytorch_lightning/loops/base.py", line 146, in run
self.on_advance_end()

File "test_kflod.py", line 206, in on_advance_end
self.trainer.strategy.setup_optimizers(self.trainer)

AttributeError: 'Trainer' object has no attribute 'strategy'`

Expected behavior

Environment

• PyTorch Lightning Version (e.g., 1.5.0): 1.5.8 (Conda)
• PyTorch Version (e.g., 1.10): 1.10.0 (pip)
• Python version (e.g., 3.9): 3.8.12
• OS (e.g., Linux): WSL
• CUDA/cuDNN version: -
• GPU models and configuration: -
• How you installed PyTorch (conda, pip, source): pip
• If compiling from source, the output of torch.__config__.show():
• Any other relevant information:

Additional context

[rohitgr7]

hey @KevinCrp !
the example there will work fine on master since Loops are currently experimental.
Check out the conversation here for more info and workaround: #11230 (comment)

[KevinCrp]

It works, thanks