PEFT How to use TFLai/CodeRush with PEFT:
from peft import PeftModel
from transformers import AutoModelForCausalLM
base_model = AutoModelForCausalLM.from_pretrained("EleutherAI/gpt-neox-20b")
model = PeftModel.from_pretrained(base_model, "TFLai/CodeRush")