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100 lines
3.1 KiB
Python
100 lines
3.1 KiB
Python
#
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# Copyright 2024 The InfiniFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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from abc import ABC
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import dashscope
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from openai import OpenAI
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from FlagEmbedding import FlagModel
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import torch
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import os
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import numpy as np
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from rag.utils import num_tokens_from_string
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flag_model = FlagModel("BAAI/bge-large-zh-v1.5",
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query_instruction_for_retrieval="为这个句子生成表示以用于检索相关文章：",
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use_fp16=torch.cuda.is_available())
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class Base(ABC):
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def __init__(self, key, model_name):
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pass
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def encode(self, texts: list, batch_size=32):
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raise NotImplementedError("Please implement encode method!")
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class HuEmbedding(Base):
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def __init__(self, key="", model_name=""):
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"""
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If you have trouble downloading HuggingFace models, -_^ this might help!!
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For Linux:
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export HF_ENDPOINT=https://hf-mirror.com
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For Windows:
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Good luck
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^_-
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"""
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self.model = flag_model
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def encode(self, texts: list, batch_size=32):
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token_count = 0
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for t in texts: token_count += num_tokens_from_string(t)
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res = []
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for i in range(0, len(texts), batch_size):
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res.extend(self.model.encode(texts[i:i + batch_size]).tolist())
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return np.array(res), token_count
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def encode_queries(self, text: str):
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token_count = num_tokens_from_string(text)
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return self.model.encode_queries([text]).tolist()[0], token_count
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class OpenAIEmbed(Base):
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def __init__(self, key, model_name="text-embedding-ada-002"):
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self.client = OpenAI(key)
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self.model_name = model_name
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def encode(self, texts: list, batch_size=32):
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token_count = 0
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for t in texts: token_count += num_tokens_from_string(t)
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res = self.client.embeddings.create(input=texts,
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model=self.model_name)
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return [d["embedding"] for d in res["data"]], token_count
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class QWenEmbed(Base):
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def __init__(self, key, model_name="text_embedding_v2"):
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dashscope.api_key = key
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self.model_name = model_name
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def encode(self, texts: list, batch_size=32, text_type="document"):
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import dashscope
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res = []
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token_count = 0
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for txt in texts:
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resp = dashscope.TextEmbedding.call(
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model=self.model_name,
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input=txt[:2048],
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text_type=text_type
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)
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res.append(resp["output"]["embeddings"][0]["embedding"])
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token_count += resp["usage"]["total_tokens"]
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return res, token_count
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