feat: inference notebook, script, and app

app.py

@@ -0,0 +1,204 @@
+import os
+import sys
+
+import fire
+import gradio as gr
+import torch
+import transformers
+from peft import PeftModel
+from transformers import GenerationConfig, LlamaForCausalLM, LlamaTokenizer
+
+from utils.callbacks import Iteratorize, Stream
+from utils.prompter import Prompter
+
+if torch.cuda.is_available():
+    device = "cuda"
+else:
+    device = "cpu"
+
+try:
+    if torch.backends.mps.is_available():
+        device = "mps"
+except:  # noqa: E722
+    pass
+
+
+def main(
+    load_8bit: bool = False,
+    base_model: str = "",
+    lora_weights: str = "",
+    prompt_template: str = "",  # The prompt template to use, will default to alpaca.
+    server_name: str = "0.0.0.0",  # Allows to listen on all interfaces by providing '0.
+    share_gradio: bool = False,
+):
+    base_model = base_model or os.environ.get("BASE_MODEL", "")
+    assert (
+        base_model
+    ), "Please specify a --base_model, e.g. --base_model='huggyllama/llama-7b'"
+
+    prompter = Prompter(prompt_template)
+    tokenizer = LlamaTokenizer.from_pretrained(base_model)
+    if device == "cuda":
+        model = LlamaForCausalLM.from_pretrained(
+            base_model,
+            load_in_8bit=load_8bit,
+            torch_dtype=torch.float16,
+            device_map="auto",
+        )
+        model = PeftModel.from_pretrained(
+            model,
+            lora_weights,
+            torch_dtype=torch.float16,
+        )
+    elif device == "mps":
+        model = LlamaForCausalLM.from_pretrained(
+            base_model,
+            device_map={"": device},
+            torch_dtype=torch.float16,
+        )
+        model = PeftModel.from_pretrained(
+            model,
+            lora_weights,
+            device_map={"": device},
+            torch_dtype=torch.float16,
+        )
+    else:
+        model = LlamaForCausalLM.from_pretrained(
+            base_model, device_map={"": device}, low_cpu_mem_usage=True
+        )
+        model = PeftModel.from_pretrained(
+            model,
+            lora_weights,
+            device_map={"": device},
+        )
+
+    # unwind broken decapoda-research config
+    model.config.pad_token_id = tokenizer.pad_token_id = 0  # unk
+    model.config.bos_token_id = 1
+    model.config.eos_token_id = 2
+
+    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(
+        instruction,
+        input=None,
+        temperature=0.1,
+        top_p=0.75,
+        top_k=40,
+        num_beams=4,
+        max_new_tokens=128,
+        stream_output=False,
+        **kwargs,
+    ):
+        prompt = prompter.generate_prompt(instruction, 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,
+            **kwargs,
+        )
+
+        generate_params = {
+            "input_ids": input_ids,
+            "generation_config": generation_config,
+            "return_dict_in_generate": True,
+            "output_scores": True,
+            "max_new_tokens": max_new_tokens,
+        }
+
+        if stream_output:
+            def generate_with_callback(callback=None, **kwargs):
+                kwargs.setdefault(
+                    "stopping_criteria", transformers.StoppingCriteriaList()
+                )
+                kwargs["stopping_criteria"].append(Stream(callback_func=callback))
+                with torch.no_grad():
+                    model.generate(**kwargs)
+
+            def generate_with_streaming(**kwargs):
+                return Iteratorize(generate_with_callback, kwargs, callback=None)
+
+            with generate_with_streaming(**generate_params) as generator:
+                for output in generator:
+                    # new_tokens = len(output) - len(input_ids[0])
+                    decoded_output = tokenizer.decode(output)
+
+                    if output[-1] in [tokenizer.eos_token_id]:
+                        break
+
+                    yield prompter.get_response(decoded_output)
+            return  # early return for stream_output
+
+        # Without streaming
+        with torch.no_grad():
+            generation_output = model.generate(
+                input_ids=input_ids,
+                generation_config=generation_config,
+                return_dict_in_generate=True,
+                output_scores=True,
+                max_new_tokens=max_new_tokens,
+            )
+        s = generation_output.sequences[0]
+        output = tokenizer.decode(s)
+        yield prompter.get_response(output)
+
+    gr.Interface(
+        fn=evaluate,
+        inputs=[
+            gr.components.Textbox(
+                lines=2,
+                label="Instruction",
+                placeholder="Tell me about alpacas.",
+            ),
+            gr.components.Textbox(lines=2, label="Input", placeholder="none"),
+            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=4, step=1, value=4, label="Beams"),
+            gr.components.Slider(
+                minimum=1, maximum=2000, step=1, value=128, label="Max tokens"
+            ),
+            gr.components.Checkbox(label="Stream output"),
+        ],
+        outputs=[
+            gr.inputs.Textbox(
+                lines=5,
+                label="Output",
+            )
+        ],
+        title="🧑‍🏫🤏 LoRA-Instruct",
+        description="🧑‍🏫🤏 LoRA-Instruct is a LoRA instruction fine-tuning for permissive open source models. For more information, please visit [the project's website](https://github.com/leehanchung/lora-instruct).",  # noqa: E501
+    ).queue().launch(server_name="0.0.0.0", share=share_gradio)
+    # Old testing code follows.
+
+    """
+    # testing code for readme
+    for instruction in [
+        "Tell me about alpacas.",
+        "Tell me about the president of Mexico in 2019.",
+        "Tell me about the king of France in 2019.",
+        "List all Canadian provinces in alphabetical order.",
+        "Write a Python program that prints the first 10 Fibonacci numbers.",
+        "Write a program that prints the numbers from 1 to 100. But for multiples of three print 'Fizz' instead of the number and for the multiples of five print 'Buzz'. For numbers which are multiples of both three and five print 'FizzBuzz'.",  # noqa: E501
+        "Tell me five words that rhyme with 'shock'.",
+        "Translate the sentence 'I have no mouth but I must scream' into Spanish.",
+        "Count up from 1 to 500.",
+    ]:
+        print("Instruction:", instruction)
+        print("Response:", evaluate(instruction))
+        print()
+    """
+
+
+if __name__ == "__main__":
+    fire.Fire(main)

inference.py

@@ -0,0 +1,59 @@
+import os
+import sys
+
+import fire
+import gradio as gr
+import torch
+import transformers
+from peft import PeftModel
+from transformers import AutoModelForCausalLM, AutoTokenizer, GenerationConfig, LlamaForCausalLM, LlamaTokenizer
+
+from utils.callbacks import Iteratorize, Stream
+from utils.prompter import Prompter
+
+if torch.cuda.is_available():
+    device = "cuda:0"
+else:
+    device = "cpu"
+
+try:
+    if torch.backends.mps.is_available():
+        device = "mps"
+except:  # noqa: E722
+    pass
+
+
+def main(base_model: str, lora_weights: str, load_8bit: bool = False,):
+    # if device == "cuda:o":
+    print(torch.cuda.is_available())
+    model = AutoModelForCausalLM.from_pretrained(
+        base_model,
+        load_in_8bit=load_8bit,
+        torch_dtype=torch.float16,
+        device_map="auto",
+    )
+    model = PeftModel.from_pretrained(
+        model,
+        lora_weights,
+        torch_dtype=torch.float16,
+    )
+    print(model.eval())
+
+    input = "this is a good day to die"
+    tokenizer = AutoTokenizer.from_pretrained(base_model)
+
+    input_ids = tokenizer(input, return_tensors="pt").input_ids.to(device)
+
+    greedy_output  = model.generate(
+        input_ids=input_ids,
+        # generation_config=generation_config,
+        return_dict_in_generate=True,
+        output_scores=True,
+        max_new_tokens=500,
+    )
+    print("Output:\n" + 100 * '-')
+    print(tokenizer.decode(greedy_output[0][0], skip_special_tokens=True))
+
+
+if __name__ == "__main__":
+    fire.Fire(main)