---
library_name: transformers
tags:
- biology
- chemistry
- biological materials
- materials science
- engineering
- materials informatics
- scientific AI
- AI4science
- Llama-3-1
---

## Inference example

```
model_name='lamm-mit/Bioinspired-Llama-3-1-8B-128k-gamma'

model = AutoModelForCausalLM.from_pretrained(
    model_name,
    trust_remote_code=True,
    device_map="auto",
    torch_dtype =torch.bfloat16,
    attn_implementation="flash_attention_2"
)
model.config.use_cache = True
tokenizer = AutoTokenizer.from_pretrained(model_name)

```

#### Function to interact with the model 

```
def generate_response (text_input="What is spider silk?",
                       system_prompt='',
                       num_return_sequences=1,
                       temperature=1., #the higher the temperature, the more creative the model becomes
                       max_new_tokens=127,device='cuda',
                       add_special_tokens = False, #since tokenizer.apply_chat_template adds <|begin_of_text|> template already, set to False
                       num_beams=1,eos_token_id= [
                                            128001,
                                            128008,
                                            128009
                                          ], verbatim=False,
                       top_k = 50,
                       top_p = 0.9,
                       repetition_penalty=1.1,
                       messages=[],
                      ):

    if messages==[]: #start new messages dictionary
        if system_prompt != '': #include system prompt if provided
            messages.extend ([  {"role": "system", "content": system_prompt},  ])
        messages.extend ( [   {"role": "user", "content": text_input}, ])
        
    else: #if messages provided, will extend (make sure to add previous response as assistant message)
        messages.append ({"role": "user", "content": text_input})
        
    text_input = tokenizer.apply_chat_template(
            messages, 
            tokenize=False, 
            add_generation_prompt=True
    )
    inputs = tokenizer([text_input],  add_special_tokens = add_special_tokens,  return_tensors ='pt' ).to(device)
    if verbatim:
        print (inputs)
    with torch.no_grad():
          outputs = model.generate(**inputs,
                                   max_new_tokens=max_new_tokens,
                                   temperature=temperature, 
                                   num_beams=num_beams,
                                   top_k = top_k,eos_token_id=eos_token_id,
                                   top_p =top_p,
                                   num_return_sequences = num_return_sequences, 
                                   do_sample =True, repetition_penalty=repetition_penalty,
                                  )
    outputs=outputs[:, inputs["input_ids"].shape[1]:]
    return tokenizer.batch_decode(outputs.detach().cpu().numpy(), skip_special_tokens=True), messages             
```
Usage: 
```
res,_= generate_response (text_input = "What is collagen?", system_prompt = 'You are a materials scientist.',
                      num_return_sequences=1,
                      temperature=1., #the higher the temperature, the more creative the model becomes
                      max_new_tokens=127,
                      num_beams=1,  
                      top_k = 50, top_p =0.9, repetition_penalty=1.1,
                       
                      )
print (res[0])
```
To realize multi-turn interactions, see this example:
```
res, messages = generate_response (text_input="What is spider silk?", messages=[])
messages.append ({"role": "assistant", "content": res[0]}, ) #append result to messages dict 
print (res)
res, messages = generate_response (text_input="Explain this result in detail.", messages=messages)
messages.append ({"role": "assistant", "content": res[0]}, ) #append result to messages dict 
print (res)
res, messages = generate_response (text_input="Provide this in JSON format.", messages=messages)
messages.append ({"role": "assistant", "content": res[0]}) #append result to messages dict 
print (res)
```