201 lines
8.5 KiB
Python
201 lines
8.5 KiB
Python
from model import TransClassifier
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from transformers import AutoTokenizer
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from data_process import extract_json_data, Formatter
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import torch
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import json
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from typing import Dict, List, Optional
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import os
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import random
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import warnings
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warnings.filterwarnings("ignore")
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valid_keys = [
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"Core_Fear_Source", "Pain_Threshold", "Time_Window_Pressure", "Helplessness_Index",
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"Social_Shame", "Payer_Decision_Maker", "Hidden_Wealth_Proof", "Price_Sensitivity",
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"Sunk_Cost", "Compensatory_Spending", "Trust_Deficit", "Secret_Resistance", "Family_Sabotage",
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"Low_Self_Efficacy", "Attribution_Barrier", "Emotional_Trigger", "Ultimatum_Event", "Expectation_Bonus",
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"Competitor_Mindset", "Cognitive_Stage", "Follow_up_Priority", "Last_Interaction", "Referral_Potential"
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]
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ch_valid_keys = [
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"核心恐惧源", "疼痛阈值", "时间窗口压力", "无助指数",
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"社会羞耻感", "付款决策者", "隐藏财富证明", "价格敏感度",
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"沉没成本", "补偿性消费", "信任赤字", "秘密抵触情绪", "家庭破坏",
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"低自我效能感", "归因障碍", "情绪触发点", "最后通牒事件", "期望加成",
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"竞争者心态", "认知阶段", "跟进优先级", "最后互动时间", "推荐潜力"
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]
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all_keys = valid_keys + ["session_id", "label"]
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en2ch = {en:ch for en, ch in zip(valid_keys, ch_valid_keys)}
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d1_keys = valid_keys[:5]
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d2_keys = valid_keys[5:10]
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d3_keys = valid_keys[10:15]
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d4_keys = valid_keys[15:19]
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d5_keys = valid_keys[19:23]
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class InferenceEngine:
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def __init__(self, backbone_dir: str, ckpt_path: str = "best_ckpt.pth", device: str = "cuda"):
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self.backbone_dir = backbone_dir
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self.ckpt_path = ckpt_path
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self.device = device
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# 加载 tokenizer
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self.tokenizer = AutoTokenizer.from_pretrained(backbone_dir)
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print(f"Tokenizer loaded from {backbone_dir}")
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# 加载模型
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self.model = TransClassifier(backbone_dir, device)
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self.model.to(device)
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if self.ckpt_path:
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self.model.load_state_dict(torch.load(ckpt_path, map_location=device))
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print(f"Model loaded from {ckpt_path}")
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else:
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print("Warning: No checkpoint path provided. Using untrained model.")
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self.model.eval()
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print("Inference engine initialized successfully.")
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self.formatter = Formatter(en2ch)
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def inference_batch(self, json_list: List[str]) -> dict:
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"""
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批量推理函数，输入为 JSON 字符串列表，输出为包含转换概率的字典列表。为防止OOM，列表最大长度为8。
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请注意Json文件中的词条数必须大于等于10.
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"""
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assert len(json_list) <= 8, "单次输入json文件数量不可超过8。"
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id2feature = extract_json_data(json_list) # id2feature
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message_list = []
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for id, feature in id2feature.items():
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messages = self.formatter.get_llm_prompt(feature)
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message_list.append(messages)
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inputs = self.tokenizer.apply_chat_template(
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message_list,
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tokenize=False,
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add_generation_prompt=True,
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enable_thinking=False
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)
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model_inputs = self.tokenizer(
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inputs,
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padding=True,
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truncation=True,
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max_length=2048,
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return_tensors="pt"
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).to(self.device)
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with torch.inference_mode():
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with torch.amp.autocast(device_type=self.device, dtype=torch.bfloat16):
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outputs = self.model(model_inputs)
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# 1. 计算分类标签（argmax）
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preds = torch.argmax(outputs, dim=1).cpu().numpy().tolist()
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# 2. 计算softmax概率（核心修正：转CPU、转numpy、转列表，解决Tensor序列化问题）
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outputs_float = outputs.float() # 转换为 float32 避免精度问题
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probs = torch.softmax(outputs_float, dim=1) # probs: [B, 2]
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# 转换为CPU的numpy数组，再转列表（每个样本对应2个类别的概率）
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probs = probs.cpu().numpy().tolist()
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# 返回格式：labels是每个样本的分类标签列表，probs是每个样本的类别概率列表
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return {"labels": preds, "probs": probs}
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def inference_sample(self, json_path: str) -> dict:
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"""
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单样本推理函数，输入为 JSON 字符串路径，输出为包含转换概率的字典。
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请注意Json文件中的词条数必须大于等于10.
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"""
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return self.inference_batch([json_path])
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if __name__ == "__main__":
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# 配置参数
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backbone_dir = "Qwen3-1.7B"
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ckpt_path = "best_ckpt.pth"
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device = "cuda"
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engine = InferenceEngine(backbone_dir, ckpt_path, device)
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from data_process import extract_json_files
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import random
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# 获取成交和未成交的json文件路径
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deal_files = extract_json_files("deal")
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not_deal_files = extract_json_files("not_deal")
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def filter_json_files_by_key_count(files: List[str], min_keys: int = 10) -> List[str]:
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"""
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过滤出JSON文件中字典键数量大于等于指定数量的文件
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Args:
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files: JSON文件路径列表
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min_keys: 最小键数量要求，默认为10
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Returns:
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符合条件的文件路径列表
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"""
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valid_files = []
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for file_path in files:
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try:
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with open(file_path, 'r', encoding='utf-8') as f:
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data = json.load(f)
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# 检查是否为字典且键数量是否符合要求
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if isinstance(data, dict) and len(data) >= min_keys:
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valid_files.append(file_path)
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else:
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print(f"跳过文件 {os.path.basename(file_path)}: 键数量不足 ({len(data)} < {min_keys})")
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except Exception as e:
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print(f"读取文件 {file_path} 时出错: {e}")
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return valid_files
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deal_files_filtered = filter_json_files_by_key_count(deal_files, min_keys=10)
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not_deal_files_filtered = filter_json_files_by_key_count(not_deal_files, min_keys=10)
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num_samples = 8
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# 计算每类需要选取的数量
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num_deal_needed = min(4, len(deal_files_filtered)) # 最多选4个成交文件
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num_not_deal_needed = min(4, len(not_deal_files_filtered)) # 最多选4个未成交文件
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# 如果某类文件不足，从另一类补足
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if num_deal_needed + num_not_deal_needed < num_samples:
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if len(deal_files_filtered) > num_deal_needed:
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num_deal_needed = min(num_samples, len(deal_files_filtered))
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elif len(not_deal_files_filtered) > num_not_deal_needed:
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num_not_deal_needed = min(num_samples, len(not_deal_files_filtered))
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# 随机选取文件
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selected_deal_files = random.sample(deal_files_filtered, min(num_deal_needed, len(deal_files_filtered))) if deal_files_filtered else []
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selected_not_deal_files = random.sample(not_deal_files_filtered, min(num_not_deal_needed, len(not_deal_files_filtered))) if not_deal_files_filtered else []
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# 合并选中的文件
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selected_files = selected_deal_files + selected_not_deal_files
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# 如果总数不足8个，尝试从原始文件中随机选取补足
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if len(selected_files) < num_samples:
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all_files = deal_files + not_deal_files
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# 排除已选的文件
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remaining_files = [f for f in all_files if f not in selected_files]
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additional_needed = num_samples - len(selected_files)
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if remaining_files:
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additional_files = random.sample(remaining_files, min(additional_needed, len(remaining_files)))
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selected_files.extend(additional_files)
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true_labels = []
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for i, file_path in enumerate(selected_files):
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folder_type = "未成交" if "not_deal" in file_path else "成交"
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true_labels.append(folder_type)
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# 使用inference_batch接口进行批量推理
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if selected_files:
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print("\n开始批量推理...")
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try:
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batch_result = engine.inference_batch(selected_files)
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print(batch_result)
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print(true_labels)
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except Exception as e:
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print(f"推理过程中出错: {e}")
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else:
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print("未找到符合条件的文件进行推理")
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print("\n推理端口测试完成!") |