mirror of
https://github.com/ParisNeo/lollms-webui.git
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69 lines
2.6 KiB
Python
69 lines
2.6 KiB
Python
######
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# Project : GPT4ALL-UI
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# File : backend.py
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# Author : ParisNeo with the help of the community
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# Supported by Nomic-AI
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# Licence : Apache 2.0
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# Description :
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# This is an interface class for GPT4All-ui backends.
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######
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from pathlib import Path
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from typing import Callable
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from transformers import AutoTokenizer
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from transformers import AutoModelForCausalLM
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from pyGpt4All.backends.backend import GPTBackend
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__author__ = "parisneo"
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__github__ = "https://github.com/nomic-ai/gpt4all-ui"
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__copyright__ = "Copyright 2023, "
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__license__ = "Apache 2.0"
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backend_name = "Transformers"
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class Transformers(GPTBackend):
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file_extension='*'
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def __init__(self, config:dict) -> None:
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"""Builds a GPT-J backend
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Args:
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config (dict): The configuration file
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"""
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super().__init__(config, True)
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self.config = config
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self.tokenizer = tokenizer = AutoTokenizer.from_pretrained(f"./models/transformers/{self.config['model']}/tokenizer.json", local_files_only=True)
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self.model = AutoModelForCausalLM.from_pretrained(f"./models/transformers/{self.config['model']}/model.bin", local_files_only=True)
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def generate(self,
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prompt:str,
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n_predict: int = 128,
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new_text_callback: Callable[[str], None] = bool,
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verbose: bool = False,
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**gpt_params ):
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"""Generates text out of a prompt
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Args:
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prompt (str): The prompt to use for generation
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n_predict (int, optional): Number of tokens to prodict. Defaults to 128.
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new_text_callback (Callable[[str], None], optional): A callback function that is called everytime a new text element is generated. Defaults to None.
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verbose (bool, optional): If true, the code will spit many informations about the generation process. Defaults to False.
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"""
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inputs = self.tokenizer(prompt, return_tensors="pt").input_ids
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while len(inputs<n_predict):
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outputs = self.model.generate(
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inputs,
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max_new_tokens=1,
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#new_text_callback=new_text_callback,
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temp=self.config['temp'],
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top_k=self.config['top_k'],
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top_p=self.config['top_p'],
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repeat_penalty=self.config['repeat_penalty'],
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repeat_last_n = self.config['repeat_last_n'],
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n_threads=self.config['n_threads'],
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verbose=verbose
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)
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inputs += outputs
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new_text_callback(self.tokenizer.batch_decode(outputs, skip_special_tokens=True))
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