PEFT How to use TinyQwen/TinyQwen3-4B-coder with PEFT:
from peft import PeftModel
from transformers import AutoModelForCausalLM
base_model = AutoModelForCausalLM.from_pretrained("unsloth/Qwen3-4B-unsloth-bnb-4bit")
model = PeftModel.from_pretrained(base_model, "TinyQwen/TinyQwen3-4B-coder") 
