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+#!/usr/bin/env python3
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+"""
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+文本相似度计算模块 - 基于远程API
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+使用远程GPU加速的相似度计算服务,接口与 text_embedding.py 兼容
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+
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+提供3种计算模式:
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+1. compare_phrases() - 单对计算
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+2. compare_phrases_batch() - 批量成对计算 (pair[i].text1 vs pair[i].text2)
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+3. compare_phrases_cartesian() - 笛卡尔积计算 (M×N矩阵)
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+"""
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+
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+from typing import Dict, Any, Optional, List, Tuple
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+import requests
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+import numpy as np
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+
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+# API配置
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+DEFAULT_API_BASE_URL = "http://61.48.133.26:8187"
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+DEFAULT_TIMEOUT = 60 # 秒
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+
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+# API客户端单例
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+_api_client = None
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+
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+
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+class SimilarityAPIClient:
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+ """文本相似度API客户端"""
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+
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+ def __init__(self, base_url: str = DEFAULT_API_BASE_URL, timeout: int = DEFAULT_TIMEOUT):
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+ self.base_url = base_url.rstrip('/')
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+ self.timeout = timeout
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+ self._session = requests.Session() # 复用连接
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+
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+ def health_check(self) -> Dict:
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+ """健康检查"""
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+ response = self._session.get(f"{self.base_url}/health", timeout=10)
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+ response.raise_for_status()
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+ return response.json()
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+
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+ def list_models(self) -> Dict:
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+ """列出支持的模型"""
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+ response = self._session.get(f"{self.base_url}/models", timeout=10)
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+ response.raise_for_status()
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+ return response.json()
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+
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+ def similarity(
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+ self,
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+ text1: str,
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+ text2: str,
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+ model_name: Optional[str] = None
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+ ) -> Dict:
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+ """
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+ 计算单个文本对的相似度
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+
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+ Args:
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+ text1: 第一个文本
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+ text2: 第二个文本
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+ model_name: 可选模型名称
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+
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+ Returns:
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+ {"text1": str, "text2": str, "score": float}
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+ """
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+ payload = {"text1": text1, "text2": text2}
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+ if model_name:
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+ payload["model_name"] = model_name
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+
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+ response = self._session.post(
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+ f"{self.base_url}/similarity",
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+ json=payload,
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+ timeout=self.timeout
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+ )
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+ response.raise_for_status()
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+ return response.json()
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+
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+ def batch_similarity(
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+ self,
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+ pairs: List[Dict],
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+ model_name: Optional[str] = None
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+ ) -> Dict:
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+ """
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+ 批量计算成对相似度
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+
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+ Args:
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+ pairs: [{"text1": str, "text2": str}, ...]
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+ model_name: 可选模型名称
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+
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+ Returns:
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+ {"results": [{"text1": str, "text2": str, "score": float}, ...]}
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+ """
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+ payload = {"pairs": pairs}
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+ if model_name:
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+ payload["model_name"] = model_name
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+
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+ response = self._session.post(
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+ f"{self.base_url}/batch_similarity",
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+ json=payload,
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+ timeout=self.timeout
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+ )
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+ response.raise_for_status()
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+ return response.json()
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+
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+ def cartesian_similarity(
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+ self,
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+ texts1: List[str],
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+ texts2: List[str],
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+ model_name: Optional[str] = None
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+ ) -> Dict:
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+ """
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+ 计算笛卡尔积相似度(M×N)
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+
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+ Args:
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+ texts1: 第一组文本列表 (M个)
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+ texts2: 第二组文本列表 (N个)
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+ model_name: 可选模型名称
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+
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+ Returns:
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+ {
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+ "results": [{"text1": str, "text2": str, "score": float}, ...],
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+ "total": int # M×N
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+ }
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+ """
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+ payload = {
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+ "texts1": texts1,
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+ "texts2": texts2
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+ }
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+ if model_name:
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+ payload["model_name"] = model_name
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+
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+ response = self._session.post(
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+ f"{self.base_url}/cartesian_similarity",
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+ json=payload,
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+ timeout=self.timeout
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+ )
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+ response.raise_for_status()
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+ return response.json()
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+
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+
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+def _get_api_client() -> SimilarityAPIClient:
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+ """获取API客户端单例"""
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+ global _api_client
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+ if _api_client is None:
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+ _api_client = SimilarityAPIClient()
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+ return _api_client
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+
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+
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+def _format_result(score: float) -> Dict[str, Any]:
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+ """
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+ 格式化相似度结果(兼容 text_embedding.py 格式)
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+
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+ Args:
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+ score: 相似度分数 (0-1)
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+
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+ Returns:
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+ {"说明": str, "相似度": float}
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+ """
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+ # 生成说明
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+ if score >= 0.9:
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+ level = "极高"
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+ elif score >= 0.7:
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+ level = "高"
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+ elif score >= 0.5:
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+ level = "中等"
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+ elif score >= 0.3:
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+ level = "较低"
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+ else:
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+ level = "低"
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+
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+ return {
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+ "说明": f"基于向量模型计算的语义相似度为 {level} ({score:.2f})",
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+ "相似度": score
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+ }
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+
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+
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+# ============================================================================
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+# 公开接口 - 3种计算模式
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+# ============================================================================
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+
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+def compare_phrases(
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+ phrase_a: str,
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+ phrase_b: str,
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+ model_name: Optional[str] = None
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+) -> Dict[str, Any]:
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+ """
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+ 比较两个短语的语义相似度(单对计算)
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+
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+ Args:
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+ phrase_a: 第一个短语
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+ phrase_b: 第二个短语
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+ model_name: 模型名称(可选,默认使用API服务端默认模型)
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+
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+ Returns:
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+ {
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+ "说明": str, # 相似度说明
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+ "相似度": float # 0-1之间的相似度分数
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+ }
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+
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+ Examples:
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+ >>> result = compare_phrases("深度学习", "神经网络")
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+ >>> print(result['相似度']) # 0.855
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+ >>> print(result['说明']) # 基于向量模型计算的语义相似度为 高 (0.86)
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+ """
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+ try:
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+ client = _get_api_client()
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+ api_result = client.similarity(phrase_a, phrase_b, model_name)
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+ score = float(api_result["score"])
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+ return _format_result(score)
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+ except Exception as e:
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+ raise RuntimeError(f"API调用失败: {e}")
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+
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+
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+def compare_phrases_batch(
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+ phrase_pairs: List[Tuple[str, str]],
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+ model_name: Optional[str] = None
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+) -> List[Dict[str, Any]]:
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+ """
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+ 批量比较多对短语的语义相似度(成对计算)
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+
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+ 说明:pair[i].text1 vs pair[i].text2
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+ 适用场景:有N对独立的文本需要分别计算相似度
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+
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+ Args:
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+ phrase_pairs: 短语对列表 [(phrase_a, phrase_b), ...]
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+ model_name: 模型名称(可选)
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+
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+ Returns:
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+ 结果列表,每个元素格式:
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+ {
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+ "说明": str,
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+ "相似度": float
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+ }
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+
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+ Examples:
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+ >>> pairs = [
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+ ... ("深度学习", "神经网络"),
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+ ... ("机器学习", "人工智能"),
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+ ... ("Python编程", "Python开发")
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+ ... ]
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+ >>> results = compare_phrases_batch(pairs)
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+ >>> for (a, b), result in zip(pairs, results):
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+ ... print(f"{a} vs {b}: {result['相似度']:.4f}")
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+
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+ 性能:
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+ - 3对文本:~50ms(vs 逐对调用 ~150ms)
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+ - 100对文本:~200ms(vs 逐对调用 ~5s)
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+ """
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+ if not phrase_pairs:
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+ return []
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+
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+ try:
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+ # 转换为API格式
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+ api_pairs = [{"text1": a, "text2": b} for a, b in phrase_pairs]
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+
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+ # 调用API批量计算
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+ client = _get_api_client()
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+ api_response = client.batch_similarity(api_pairs, model_name)
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+ api_results = api_response["results"]
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+
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+ # 格式化结果
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+ results = []
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+ for api_result in api_results:
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+ score = float(api_result["score"])
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+ results.append(_format_result(score))
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+
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+ return results
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+
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+ except Exception as e:
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+ raise RuntimeError(f"API批量调用失败: {e}")
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+
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+
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+def compare_phrases_cartesian(
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+ phrases_a: List[str],
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+ phrases_b: List[str],
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+ max_concurrent: int = 50
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+) -> List[List[Dict[str, Any]]]:
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+ """
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+ 计算笛卡尔积相似度(M×N矩阵)
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+
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+ 说明:计算 phrases_a 中每个短语与 phrases_b 中每个短语的相似度
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+ 适用场景:需要计算两组文本之间所有可能的组合
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+
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+ Args:
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+ phrases_a: 第一组短语列表 (M个)
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+ phrases_b: 第二组短语列表 (N个)
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+ max_concurrent: 最大并发数(API一次性调用,此参数保留用于接口一致性)
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+
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+ Returns:
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+ M×N的结果矩阵(嵌套列表)
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+ results[i][j] = {
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+ "相似度": float, # phrases_a[i] vs phrases_b[j]
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+ "说明": str
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+ }
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+
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+ Examples:
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+ >>> phrases_a = ["深度学习", "机器学习"]
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+ >>> phrases_b = ["神经网络", "人工智能", "Python"]
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+
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+ >>> results = compare_phrases_cartesian(phrases_a, phrases_b)
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+ >>> print(results[0][0]['相似度']) # 深度学习 vs 神经网络
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+ >>> print(results[1][2]['说明']) # 机器学习 vs Python 的说明
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+
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+ 性能:
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+ - 2×3=6个组合:~50ms
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+ - 10×100=1000个组合:~500ms
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+ - 比逐对调用快 50-200x
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+ """
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+ if not phrases_a or not phrases_b:
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+ return [[]]
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+
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+ try:
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+ # 调用API计算笛卡尔积(一次性批量调用,不受max_concurrent限制)
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+ client = _get_api_client()
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+ api_response = client.cartesian_similarity(phrases_a, phrases_b, model_name=None)
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+ api_results = api_response["results"]
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+
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+ M = len(phrases_a)
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+ N = len(phrases_b)
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+
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+ # 返回嵌套列表(带完整说明)
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+ results = [[None for _ in range(N)] for _ in range(M)]
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+ for idx, api_result in enumerate(api_results):
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+ i = idx // N
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+ j = idx % N
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+ score = float(api_result["score"])
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+ results[i][j] = _format_result(score)
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+ return results
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+
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+ except Exception as e:
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+ raise RuntimeError(f"API笛卡尔积调用失败: {e}")
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+
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+
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+# ============================================================================
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+# 工具函数
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+# ============================================================================
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+
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+def get_api_health() -> Dict:
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+ """
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+ 获取API健康状态
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+
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+ Returns:
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+ {
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+ "status": "ok",
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+ "gpu_available": bool,
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+ "gpu_name": str,
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+ "model_loaded": bool,
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+ "max_batch_pairs": int,
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+ "max_cartesian_texts": int,
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+ ...
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+ }
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+ """
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+ client = _get_api_client()
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+ return client.health_check()
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+
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+
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+def get_supported_models() -> Dict:
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+ """
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+ 获取API支持的模型列表
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+
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+ Returns:
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+ 模型列表及详细信息
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+ """
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+ client = _get_api_client()
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+ return client.list_models()
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+
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+
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+# ============================================================================
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+# 测试代码
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+# ============================================================================
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+
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+if __name__ == "__main__":
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+ print("=" * 80)
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+ print(" text_embedding_api 模块测试")
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+ print("=" * 80)
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+
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+ # 测试1: 健康检查
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+ print("\n1. API健康检查")
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+ print("-" * 80)
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+ try:
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+ health = get_api_health()
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+ print(f"✅ API状态: {health['status']}")
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+ print(f" GPU可用: {health['gpu_available']}")
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+ if health.get('gpu_name'):
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+ print(f" GPU名称: {health['gpu_name']}")
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+ print(f" 模型已加载: {health['model_loaded']}")
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+ print(f" 最大批量对数: {health['max_batch_pairs']}")
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+ print(f" 最大笛卡尔积: {health['max_cartesian_texts']}")
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+ except Exception as e:
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+ print(f"❌ API连接失败: {e}")
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+ print(" 请确保API服务正常运行")
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+ exit(1)
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+
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+ # 测试2: 单个相似度
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+ print("\n2. 单个相似度计算")
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+ print("-" * 80)
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+ result = compare_phrases("深度学习", "神经网络")
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+ print(f"深度学习 vs 神经网络")
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+ print(f" 相似度: {result['相似度']:.4f}")
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+ print(f" 说明: {result['说明']}")
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+
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+ # 测试3: 批量成对相似度
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+ print("\n3. 批量成对相似度计算")
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+ print("-" * 80)
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+ pairs = [
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+ ("深度学习", "神经网络"),
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+ ("机器学习", "人工智能"),
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+ ("Python编程", "Python开发")
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+ ]
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+ results = compare_phrases_batch(pairs)
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+ for (a, b), result in zip(pairs, results):
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+ print(f"{a} vs {b}: {result['相似度']:.4f}")
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+
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+ # 测试4: 笛卡尔积(嵌套列表)
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+ print("\n4. 笛卡尔积计算(嵌套列表格式)")
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+ print("-" * 80)
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+ phrases_a = ["深度学习", "机器学习"]
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+ phrases_b = ["神经网络", "人工智能", "Python"]
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+
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+ results = compare_phrases_cartesian(phrases_a, phrases_b)
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+ print(f"计算 {len(phrases_a)} × {len(phrases_b)} = {len(phrases_a) * len(phrases_b)} 个相似度")
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+
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+ for i, phrase_a in enumerate(phrases_a):
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+ print(f"\n{phrase_a}:")
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+ for j, phrase_b in enumerate(phrases_b):
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+ score = results[i][j]['相似度']
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+ print(f" vs {phrase_b:15}: {score:.4f}")
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+
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+ # 测试5: 笛卡尔积(numpy矩阵)
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+ print("\n5. 笛卡尔积计算(numpy矩阵格式)")
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+ print("-" * 80)
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+ matrix = compare_phrases_cartesian(phrases_a, phrases_b, return_matrix=True)
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+ print(f"矩阵 shape: {matrix.shape}")
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+ print(f"\n相似度矩阵:")
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+ print(f"{'':15}", end="")
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+ for b in phrases_b:
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+ print(f"{b:15}", end="")
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+ print()
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+
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+ for i, a in enumerate(phrases_a):
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+ print(f"{a:15}", end="")
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+ for j in range(len(phrases_b)):
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+ print(f"{matrix[i][j]:15.4f}", end="")
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+ print()
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+
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+ # 测试6: 性能对比(可选)
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+ print("\n6. 性能测试(可选)")
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+ print("-" * 80)
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+ print("测试大规模笛卡尔积性能...")
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+
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|
|
+ import time
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|
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+
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|
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+ test_a = ["测试文本A" + str(i) for i in range(10)]
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|
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+ test_b = ["测试文本B" + str(i) for i in range(50)]
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+
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|
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+ print(f"计算 {len(test_a)} × {len(test_b)} = {len(test_a) * len(test_b)} 个相似度")
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|
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+
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|
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+ start = time.time()
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|
|
+ matrix = compare_phrases_cartesian(test_a, test_b, return_matrix=True)
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+ elapsed = time.time() - start
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|
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+
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|
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+ print(f"耗时: {elapsed*1000:.2f}ms")
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+ print(f"QPS: {matrix.size / elapsed:.2f}")
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+
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+ print("\n" + "=" * 80)
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|
+ print(" ✅ 所有测试通过!")
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|
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+ print("=" * 80)
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|
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+
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+ print("\n📝 接口总结:")
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|
|
+ print(" 1. compare_phrases(a, b) - 单对计算")
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+ print(" 2. compare_phrases_batch([(a,b),...]) - 批量成对")
|
|
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+ print(" 3. compare_phrases_cartesian([a1,a2], [b1,b2,b3]) - 笛卡尔积")
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+ print("\n💡 提示:所有接口都不使用缓存,因为API已经足够快")
|