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Delete openai_service.py
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openai_service.py
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from flask import Flask, request, jsonify
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import tiktoken
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import os
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app = Flask(__name__)
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# OpenAI模型映射
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MODEL_MAPPINGS = {
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# GPT-4系列
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"gpt-4o": "o200k_base",
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"gpt-4-turbo": "cl100k_base",
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"gpt-4": "cl100k_base",
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# GPT-3.5系列
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"gpt-3.5-turbo": "cl100k_base",
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"gpt-35-turbo": "cl100k_base",
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# 旧模型
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"text-davinci-003": "p50k_base",
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"text-davinci-002": "p50k_base",
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"davinci": "r50k_base",
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# 嵌入模型
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"text-embedding-ada-002": "cl100k_base",
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}
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@app.route('/count_tokens', methods=['POST'])
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def count_tokens():
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try:
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data = request.json
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messages = data.get('messages', [])
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system = data.get('system')
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model = data.get('model', 'gpt-3.5-turbo')
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# 根据模型名称选择合适的编码器
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model_key = model.lower()
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encoding_name = None
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# 查找完全匹配
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if model_key in MODEL_MAPPINGS:
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encoding_name = MODEL_MAPPINGS[model_key]
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else:
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# 查找部分匹配
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for key in MODEL_MAPPINGS:
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if key in model_key:
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encoding_name = MODEL_MAPPINGS[key]
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break
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# 如果没有找到匹配,使用默认的cl100k_base编码器
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if not encoding_name:
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encoding_name = "cl100k_base" # 最常用的编码器
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# 获取编码器
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try:
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encoding = tiktoken.get_encoding(encoding_name)
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except KeyError:
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# 如果找不到编码器,使用gpt-3.5-turbo的编码器
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encoding = tiktoken.encoding_for_model("gpt-3.5-turbo")
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# 计算tokens
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total_tokens = 0
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# 按照OpenAI的格式计算tokens
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# 参考: https://github.com/openai/openai-cookbook/blob/main/examples/How_to_count_tokens_with_tiktoken.ipynb
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# 对于ChatGPT模型,每个请求都有3个隐藏tokens
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if encoding_name in ["cl100k_base", "o200k_base"]:
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# 每条消息开头有3个token,结尾有1个token
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total_tokens += 3 # 每个请求的起始tokens
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# 计算每条消息的tokens
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for message in messages:
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total_tokens += 4 # 每条消息增加4个token (包括角色)
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for key, value in message.items():
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total_tokens += len(encoding.encode(value))
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# 名称字段比较少见,但也计入
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if key == "name":
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total_tokens -= 1 # 角色名称单独token计算减免
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# 计算system消息的token
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if system:
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total_tokens += 4 # system消息也视为一条消息
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total_tokens += len(encoding.encode(system))
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else:
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# 对于旧模型,只计算文本的token数量
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all_text = ""
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if system:
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all_text += system + "\n\n"
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for message in messages:
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role = message.get('role', '')
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content = message.get('content', '')
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all_text += f"{role}: {content}\n"
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total_tokens = len(encoding.encode(all_text))
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return jsonify({
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'input_tokens': total_tokens,
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'model': model,
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'encoding': encoding_name
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})
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except Exception as e:
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return jsonify({
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'error': str(e)
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}), 400
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@app.route('/health', methods=['GET'])
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def health():
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return jsonify({
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'status': 'healthy',
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'tokenizer': 'openai-tiktoken',
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'supported_models': list(MODEL_MAPPINGS.keys())
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})
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if __name__ == '__main__':
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app.run(host='127.0.0.1', port=7862)
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