transformers safetensors qwen2 text-generation conversational en dataset:iamtarun/python_code_instructions_18k_alpaca arxiv:1910.09700 base_model:Qwen/Qwen2-0.5B-Instruct base_model:finetune:Qwen/Qwen2-0.5B-Instruct license:apache-2.0 autotrain_compatible text-generation-inference endpoints_compatible region:us