PEFT How to use under-tree/mirody-decody with PEFT:
from peft import PeftModel
from transformers import AutoModelForCausalLM
base_model = AutoModelForCausalLM.from_pretrained("ai-forever/rugpt3small_based_on_gpt2")
model = PeftModel.from_pretrained(base_model, "under-tree/mirody-decody")