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| import sys | |
| import torch | |
| from peft import PeftModel, PeftModelForCausalLM, LoraConfig | |
| import transformers | |
| import gradio as gr | |
| import argparse | |
| import warnings | |
| import os | |
| from utils import StreamPeftGenerationMixin,StreamLlamaForCausalLM | |
| # assert ( | |
| # "LlamaTokenizer" in transformers._import_structure["models.llama"] | |
| # ), "LLaMA is now in HuggingFace's main branch.\nPlease reinstall it: pip uninstall transformers && pip install git+https://github.com/huggingface/transformers.git" | |
| from transformers import LlamaTokenizer, LlamaForCausalLM, GenerationConfig | |
| parser = argparse.ArgumentParser() | |
| TOT_CUDA="0" #Upgrade bitsandbytes to the latest version to enable balanced loading of multiple GPUs, for example: pip install bitsandbytes==0.39.0 | |
| BASE_MODEL="ziqingyang/chinese-llama-2-13b" | |
| LORA_PATH="teachyourselfcoding/llama-2-13b-22sep" | |
| USE_LOCAL=1 # 1: use local model, 0: use huggingface model | |
| TYPE_WRITER=1 # whether output streamly | |
| args = parser.parse_args() | |
| print(args) | |
| tokenizer = LlamaTokenizer.from_pretrained(BASE_MODEL) | |
| LOAD_8BIT = True | |
| # fix the path for local checkpoint | |
| lora_bin_path = os.path.join(LORA_PATH, "adapter_model.bin") | |
| print(lora_bin_path) | |
| if not os.path.exists(lora_bin_path) and USE_LOCAL: | |
| pytorch_bin_path = os.path.join(LORA_PATH, "pytorch_model.bin") | |
| print(pytorch_bin_path) | |
| if os.path.exists(pytorch_bin_path): | |
| os.rename(pytorch_bin_path, lora_bin_path) | |
| warnings.warn( | |
| "The file name of the lora checkpoint'pytorch_model.bin' is replaced with 'adapter_model.bin'" | |
| ) | |
| else: | |
| assert ('Checkpoint is not Found!') | |
| if torch.cuda.is_available(): | |
| device = "cuda" | |
| else: | |
| device = "cpu" | |
| try: | |
| if torch.backends.mps.is_available(): | |
| device = "mps" | |
| except: | |
| pass | |
| if device == "cuda": | |
| model = LlamaForCausalLM.from_pretrained( | |
| BASE_MODEL, | |
| load_in_8bit=LOAD_8BIT, | |
| torch_dtype=torch.float16, | |
| device_map="auto", #device_map={"": 0}, | |
| ) | |
| model = StreamPeftGenerationMixin.from_pretrained( | |
| model, LORA_PATH, torch_dtype=torch.float16, device_map="auto", #device_map={"": 0} | |
| ) | |
| elif device == "mps": | |
| model = LlamaForCausalLM.from_pretrained( | |
| BASE_MODEL, | |
| device_map={"": device}, | |
| torch_dtype=torch.float16, | |
| ) | |
| model = StreamPeftGenerationMixin.from_pretrained( | |
| model, | |
| LORA_PATH, | |
| device_map={"": device}, | |
| torch_dtype=torch.float16, | |
| ) | |
| else: | |
| model = LlamaForCausalLM.from_pretrained( | |
| BASE_MODEL, device_map={"": device}, low_cpu_mem_usage=True | |
| ) | |
| model = StreamPeftGenerationMixin.from_pretrained( | |
| model, | |
| LORA_PATH, | |
| device_map={"": device}, | |
| ) | |
| def generate_prompt(instruction, input=None): | |
| if input: | |
| return f"""你是一个乐于助人的中文助手，请你回答一下以下问题 | |
| ### Instruction: | |
| {instruction} | |
| ### Input: | |
| {input} | |
| ### Response:""" | |
| else: | |
| return f"""你是一个乐于助人的中文助手，请你回答一下以下问题 | |
| ### Instruction: | |
| {instruction} | |
| ### Response:""" | |
| if not LOAD_8BIT: | |
| model.half() # seems to fix bugs for some users. | |
| model.eval() | |
| if torch.__version__ >= "2" and sys.platform != "win32": | |
| model = torch.compile(model) | |
| def evaluate( | |
| input, | |
| temperature=0.1, | |
| top_p=0.75, | |
| top_k=40, | |
| num_beams=4, | |
| max_new_tokens=128, | |
| min_new_tokens=1, | |
| repetition_penalty=2.0, | |
| **kwargs, | |
| ): | |
| prompt = generate_prompt(input) | |
| inputs = tokenizer(prompt, return_tensors="pt") | |
| input_ids = inputs["input_ids"].to(device) | |
| generation_config = GenerationConfig( | |
| temperature=temperature, | |
| top_p=top_p, | |
| top_k=top_k, | |
| num_beams=num_beams, | |
| bos_token_id=1, | |
| eos_token_id=2, | |
| pad_token_id=0, | |
| max_new_tokens=max_new_tokens, # max_length=max_new_tokens+input_sequence | |
| min_new_tokens=min_new_tokens, # min_length=min_new_tokens+input_sequence | |
| **kwargs, | |
| ) | |
| with torch.no_grad(): | |
| if TYPE_WRITER: | |
| for generation_output in model.stream_generate( | |
| input_ids=input_ids, | |
| generation_config=generation_config, | |
| return_dict_in_generate=True, | |
| output_scores=False, | |
| repetition_penalty=float(repetition_penalty), | |
| ): | |
| outputs = tokenizer.batch_decode(generation_output) | |
| show_text = "\n--------------------------------------------\n".join( | |
| [output.split("### Response:")[1].strip().replace('�','')+" ▌" for output in outputs] | |
| ) | |
| # if show_text== '': | |
| # yield last_show_text | |
| # else: | |
| yield show_text | |
| yield outputs[0].split("### Response:")[1].strip().replace('�','') | |
| else: | |
| generation_output = model.generate( | |
| input_ids=input_ids, | |
| generation_config=generation_config, | |
| return_dict_in_generate=True, | |
| output_scores=False, | |
| repetition_penalty=1.3, | |
| ) | |
| output = generation_output.sequences[0] | |
| output = tokenizer.decode(output).split("### Response:")[1].strip() | |
| print(output) | |
| yield output | |
| gr.Interface( | |
| fn=evaluate, | |
| inputs=[ | |
| gr.components.Textbox( | |
| lines=2, label="Input", placeholder="Tell me about alpacas." | |
| ), | |
| gr.components.Slider(minimum=0, maximum=1, value=0.1, label="Temperature"), | |
| gr.components.Slider(minimum=0, maximum=1, value=0.75, label="Top p"), | |
| gr.components.Slider(minimum=0, maximum=100, step=1, value=40, label="Top k"), | |
| gr.components.Slider(minimum=1, maximum=10, step=1, value=4, label="Beams Number"), | |
| gr.components.Slider( | |
| minimum=1, maximum=2000, step=1, value=256, label="Max New Tokens" | |
| ), | |
| gr.components.Slider( | |
| minimum=1, maximum=300, step=1, value=1, label="Min New Tokens" | |
| ), | |
| gr.components.Slider( | |
| minimum=0.1, maximum=10.0, step=0.1, value=2.0, label="Repetition Penalty" | |
| ), | |
| ], | |
| outputs=[ | |
| gr.inputs.Textbox( | |
| lines=25, | |
| label="Output", | |
| ) | |
| ], | |
| title="HKLawGPT", | |
| description="", | |
| ).queue().launch() | |