handler.py

from transformers import AutoTokenizer, AutoModelForCausalLM
import re
import time
import torch

class SweetCommander():

    def __init__(self, path="BlueDice/Katakuri-350m") -> None:
        self.tokenizer = AutoTokenizer.from_pretrained(path)
        self.model = AutoModelForCausalLM.from_pretrained(
            path,
            low_cpu_mem_usage = True, 
            trust_remote_code = False,
            torch_dtype = torch.float32,
        )
        self.default_template = open("character_card.txt", "r").read()
        self.star_line = "***********************************************************"

    def __call__(self, char_name, user_name, user_input):
        t1 = time.time()
        prompt = self.default_template.format(
            char_name = char_name,
            user_name = user_name,
            user_input = user_input
        )
        print(self.star_line)
        print(prompt)
        input_ids = self.tokenizer(prompt + f"\n{char_name}:", return_tensors = "pt")
        encoded_output = self.model.generate(
            input_ids["input_ids"],
            max_new_tokens = 50,
            temperature = 0.5,
            do_sample = True,
            top_p = 0.9,
            top_k = 0,
            repetition_penalty = 1.1,
            pad_token_id = 50256,
            num_return_sequences = 1
        )
        decoded_output = self.tokenizer.decode(encoded_output[0], skip_special_tokens = True).replace(prompt, "")
        decoded_output = decoded_output.split(f"{char_name}:", 1)[1].split(f"{user_name}:",1)[0].strip()
        # parsed_result = re.sub('\*.*?\*', '', decoded_output).strip()
        # if len(parsed_result) != 0: decoded_output = parsed_result
        # decoded_output = " ".join(decoded_output.replace("*","").split())
        # try:
        #     parsed_result = decoded_output[:[m.start() for m in re.finditer(r'[.!?]', decoded_output)][-1]+1]
        #     if len(parsed_result) != 0: decoded_output = parsed_result
        # except Exception: pass
        print(self.star_line)
        print("Response:",decoded_output)
        print("Eval time:",time.time()-t1)
        print(self.star_line)
        return decoded_output