新增功能: - 新增统一批量预测工具 utils/batch_predictor.py * 支持单进程/多进程并行模式 * 灵活的 GPU 配置和显存自动计算 * 自动临时文件管理和断点续传 * 完整的 CLI 参数支持(Click 框架) - 新增 Shell 脚本集合 scripts/ * run_parallel_predict.sh - 并行预测脚本 * run_single_predict.sh - 单进程预测脚本 * merge_results.sh - 结果合并脚本 性能优化: - 解决 CUDA + multiprocessing fork 死锁问题 * 使用 spawn 模式替代 fork * 文件描述符级别的输出重定向 - 优化预测性能 * XGBoost OpenMP 多线程(利用所有 CPU 核心) * 预加载模型减少重复加载 * 大批量处理降低函数调用开销 * 实际加速比:2-3x(12进程 vs 单进程) - 优化输出显示 * 抑制模型加载时的权重信息 * 只显示进度条和关键统计 * 临时文件自动保存到专门目录 文档更新: - README.md 新增"大规模并行预测"章节 - README.md 新增"性能优化说明"章节 - 添加详细的使用示例和参数说明 - 更新项目结构和版本信息 技术细节: - 每个模型实例约占用 2.5GB GPU 显存 - 显存计算公式:建议进程数 = GPU显存(GB) / 2.5 - GPU 瓶颈占比:MolE 表示生成 94% - 非 GIL 问题:计算密集任务在 C/CUDA 层 Breaking Changes: - 废弃旧的独立预测脚本,统一使用新工具 相关 Issue: 解决 #并行预测卡死问题 测试平台: Linux, 256 CPU cores, NVIDIA RTX 5090 32GB
508 lines
15 KiB
Python
Executable File
508 lines
15 KiB
Python
Executable File
#!/usr/bin/env python3
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"""
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批量抗菌活性预测工具
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这个工具用于大规模预测分子的抗菌活性,支持:
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- 单进程或多进程并行预测
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- 自动处理大型 CSV 文件
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- 灵活的 GPU 配置
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- 临时文件管理和断点续传
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技术细节:
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- 使用 ParallelBroadSpectrumPredictor(单进程 + XGBoost OpenMP 多线程)
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- 避免 CUDA fork 死锁问题
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- 每个模型实例约占用 2.5GB GPU 显存
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- XGBoost 自动利用所有 CPU 核心
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作者: AI Assistant
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日期: 2025-10-17
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"""
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import sys
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import os
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import time
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import click
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import pandas as pd
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from pathlib import Path
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from tqdm import tqdm
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from contextlib import redirect_stdout, redirect_stderr
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import multiprocessing as mp
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# 添加项目根目录到 Python 路径
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project_root = Path(__file__).parent.parent
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sys.path.insert(0, str(project_root))
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from models.broad_spectrum_predictor import (
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ParallelBroadSpectrumPredictor,
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MoleculeInput,
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PredictionConfig
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)
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def predict_single_process(
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input_path: str,
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output_path: str,
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smiles_column: str,
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id_column: str,
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device: str,
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batch_size: int,
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start_from: int,
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max_molecules: int,
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temp_dir: Path,
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verbose: bool = True
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) -> pd.DataFrame:
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"""
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单进程预测分子抗菌活性
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Args:
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input_path: 输入 CSV 文件路径
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output_path: 输出 CSV 文件路径
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smiles_column: SMILES 列名
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id_column: 化合物 ID 列名
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device: GPU 设备(如 'cuda:0' 或 'cpu')
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batch_size: 批处理大小
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start_from: 从第几行开始
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max_molecules: 最多处理多少个分子
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temp_dir: 临时文件目录
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verbose: 是否显示详细信息
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Returns:
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预测结果 DataFrame
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"""
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# 读取数据
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df_input = pd.read_csv(input_path)
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# 检查列是否存在(大小写不敏感)
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columns_lower = {col.lower(): col for col in df_input.columns}
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smiles_col_actual = columns_lower.get(smiles_column.lower())
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if smiles_col_actual is None:
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raise ValueError(
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f"SMILES 列 '{smiles_column}' 不存在。可用列: {list(df_input.columns)}"
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)
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# 处理 ID 列
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id_col_actual = columns_lower.get(id_column.lower())
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if id_col_actual is None:
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if verbose:
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print(f"未找到 ID 列 '{id_column}',将自动生成 ID")
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df_input[id_column] = [f"mol{i+1}" for i in range(len(df_input))]
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id_col_actual = id_column
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# 应用限制
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if start_from > 0:
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df_input = df_input.iloc[start_from:]
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if max_molecules:
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df_input = df_input.iloc[:max_molecules]
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if verbose:
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print(f" 处理 {len(df_input):,} 个分子")
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# 初始化预测器
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config = PredictionConfig(
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batch_size=10000,
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device=device
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)
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# 抑制模型加载时的输出
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if not verbose:
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with open(os.devnull, 'w') as devnull:
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with redirect_stdout(devnull):
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predictor = ParallelBroadSpectrumPredictor(config)
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else:
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predictor = ParallelBroadSpectrumPredictor(config)
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# 分批处理
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all_results = []
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n_batches = (len(df_input) + batch_size - 1) // batch_size
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iterator = range(0, len(df_input), batch_size)
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if verbose:
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iterator = tqdm(iterator, desc="处理进度", unit="批")
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for i in iterator:
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batch_df = df_input.iloc[i:i+batch_size]
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# 准备分子输入
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molecules = [
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MoleculeInput(
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smiles=row[smiles_col_actual],
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chem_id=str(row[id_col_actual])
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)
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for _, row in batch_df.iterrows()
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]
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# 执行预测
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try:
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# 抑制详细输出
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with open(os.devnull, 'w') as devnull:
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with redirect_stdout(devnull):
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results = predictor.predict_batch(
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molecules,
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include_strain_predictions=False
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)
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# 转换结果
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for result in results:
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result_dict = result.to_dict()
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mol_idx = int(result.chem_id.replace('mol', '')) - 1
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if mol_idx < len(batch_df):
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result_dict['smiles'] = batch_df.iloc[mol_idx][smiles_col_actual]
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all_results.append(result_dict)
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except Exception as e:
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if verbose:
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print(f"\n❌ 批次 {i//batch_size + 1} 失败: {e}")
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continue
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# 定期保存临时结果(每 10 批)
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if (i // batch_size + 1) % 10 == 0:
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temp_df = pd.DataFrame(all_results)
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temp_file = temp_dir / f"batch_{i//batch_size+1}.csv"
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temp_df.to_csv(temp_file, index=False)
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if verbose:
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print(f"\n💾 临时保存: {temp_file}")
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# 转换为 DataFrame
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df_results = pd.DataFrame(all_results)
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# 重新排列列顺序
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if 'smiles' in df_results.columns:
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cols = ['smiles', 'chem_id'] + [col for col in df_results.columns
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if col not in ['smiles', 'chem_id']]
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df_results = df_results[cols]
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# 保存结果
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df_results.to_csv(output_path, index=False)
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return df_results
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def predict_chunk_worker(args):
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"""
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多进程工作函数:处理单个数据块
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Args:
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args: (chunk_data, chunk_id, output_file, params_dict)
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Returns:
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(chunk_id, output_file, success)
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"""
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chunk_data, chunk_id, output_file, params = args
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try:
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# 保存 chunk 数据到临时文件
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temp_input = params['temp_dir'] / f"chunk_{chunk_id}_input.csv"
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chunk_data.to_csv(temp_input, index=False)
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# 调用单进程预测
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predict_single_process(
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input_path=str(temp_input),
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output_path=str(output_file),
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smiles_column=params['smiles_column'],
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id_column=params['id_column'],
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device=params['device'],
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batch_size=params['batch_size'],
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start_from=0,
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max_molecules=None,
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temp_dir=params['temp_dir'],
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verbose=(chunk_id == 0) # 只有第一个进程显示详细信息
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)
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# 清理临时输入文件
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temp_input.unlink()
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return chunk_id, output_file, True
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except Exception as e:
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print(f"❌ Chunk {chunk_id} 失败: {e}")
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import traceback
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traceback.print_exc()
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return chunk_id, output_file, False
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@click.command()
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@click.option(
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'--input', '-i',
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required=True,
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type=click.Path(exists=True),
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help='输入 CSV 文件路径'
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)
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@click.option(
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'--output', '-o',
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required=True,
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type=click.Path(),
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help='输出 CSV 文件路径'
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)
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@click.option(
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'--smiles-column', '-s',
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default='smiles',
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help='SMILES 列名(默认: smiles)'
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)
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@click.option(
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'--id-column', '-d',
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default='chem_id',
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help='化合物 ID 列名(默认: chem_id,如不存在则自动生成)'
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)
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@click.option(
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'--device', '-g',
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default='cuda:0',
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help='GPU 设备(默认: cuda:0)。可选: cuda:0, cuda:1, cpu'
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)
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@click.option(
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'--n-processes', '-n',
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default=1,
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type=int,
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help='并行进程数(默认: 1)。建议值 = GPU显存(GB) / 2.5。例如 32GB 显存可用 ~12 个进程'
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)
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@click.option(
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'--batch-size', '-b',
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default=1000,
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type=int,
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help='每批处理的分子数量(默认: 1000)'
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)
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@click.option(
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'--start-from',
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default=0,
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type=int,
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help='从第几行开始处理(默认: 0,用于断点续传)'
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)
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@click.option(
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'--max-molecules', '-m',
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default=None,
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type=int,
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help='最多处理多少个分子(默认: None,处理全部)'
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)
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@click.option(
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'--temp-dir',
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default=None,
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type=click.Path(),
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help='临时文件目录(默认: {输入文件名}_temp)'
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)
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@click.option(
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'--keep-temp/--no-keep-temp',
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default=True,
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help='是否保留临时文件(默认: 保留)'
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)
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@click.option(
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'--verbose/--quiet',
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default=True,
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help='是否显示详细信息(默认: 显示)'
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)
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def main(
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input: str,
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output: str,
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smiles_column: str,
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id_column: str,
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device: str,
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n_processes: int,
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batch_size: int,
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start_from: int,
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max_molecules: int,
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temp_dir: str,
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keep_temp: bool,
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verbose: bool
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):
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"""
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批量预测分子抗菌活性
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\b
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示例用法:
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1. 单进程预测(最稳定):
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pixi run python utils/batch_predictor.py -i data.csv -o output.csv
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2. 多进程并行(4个进程,适合32GB显存):
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pixi run python utils/batch_predictor.py -i data.csv -o output.csv -n 4
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3. 指定 GPU 和列名:
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pixi run python utils/batch_predictor.py -i data.csv -o output.csv \\
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-g cuda:1 -s SMILES -d ID -n 8
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4. 断点续传(从第 100000 行开始):
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pixi run python utils/batch_predictor.py -i data.csv -o output.csv \\
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--start-from 100000
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\b
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显存计算公式:
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- 每个模型实例约占用 2.5GB GPU 显存
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- 建议并行进程数 = GPU显存(GB) / 2.5
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- 例如:
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* 12GB 显存 → 建议 4 个进程
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* 24GB 显存 → 建议 9 个进程
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* 32GB 显存 → 建议 12 个进程
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* 48GB 显存 → 建议 19 个进程
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\b
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注意事项:
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- 单 GPU 上的多进程会串行使用 GPU,不是真正的并行
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- 预期加速比约 2-3x(而非线性加速)
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- 如果 GPU 内存不足,减少 n-processes
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- 临时文件保存在 {输入文件名}_temp/ 目录
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"""
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print("=" * 80)
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print("🚀 批量抗菌活性预测")
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print("=" * 80)
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# 设置路径
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input_path = Path(input)
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output_path = Path(output)
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if temp_dir is None:
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temp_dir = input_path.parent / f"{input_path.stem}_temp"
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else:
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temp_dir = Path(temp_dir)
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temp_dir.mkdir(parents=True, exist_ok=True)
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# 显示配置
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if verbose:
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print(f"\n配置:")
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print(f" 输入文件: {input_path}")
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print(f" 输出文件: {output_path}")
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print(f" SMILES 列: {smiles_column}")
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print(f" ID 列: {id_column}")
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print(f" GPU 设备: {device}")
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print(f" 并行进程数: {n_processes}")
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print(f" 批处理大小: {batch_size}")
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print(f" 临时目录: {temp_dir}")
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if start_from > 0:
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print(f" 开始行: {start_from}")
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if max_molecules:
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print(f" 最多处理: {max_molecules:,} 个分子")
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print("=" * 80)
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start_time = time.time()
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# 单进程模式
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if n_processes == 1:
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if verbose:
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print("\n📦 使用单进程模式")
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df_results = predict_single_process(
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input_path=str(input_path),
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output_path=str(output_path),
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smiles_column=smiles_column,
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id_column=id_column,
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device=device,
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batch_size=batch_size,
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start_from=start_from,
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max_molecules=max_molecules,
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temp_dir=temp_dir,
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verbose=verbose
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)
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# 多进程模式
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else:
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if verbose:
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print(f"\n📦 使用多进程模式({n_processes} 个进程)")
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# 读取数据
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df_input = pd.read_csv(input_path)
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# 应用限制
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if start_from > 0:
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df_input = df_input.iloc[start_from:]
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if max_molecules:
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df_input = df_input.iloc[:max_molecules]
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# 分割数据
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chunk_size = len(df_input) // n_processes
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chunks = []
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for i in range(n_processes):
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start_idx = i * chunk_size
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if i == n_processes - 1:
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end_idx = len(df_input)
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else:
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end_idx = (i + 1) * chunk_size
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chunk = df_input.iloc[start_idx:end_idx].copy()
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output_file = temp_dir / f"part_{i}.csv"
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params = {
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'smiles_column': smiles_column,
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'id_column': id_column,
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'device': device,
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'batch_size': batch_size,
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'temp_dir': temp_dir
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}
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chunks.append((chunk, i, output_file, params))
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if verbose:
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print(f" 数据分成 {n_processes} 块")
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print(f" 每块约 {chunk_size:,} 个分子")
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print(f"\n🔄 开始并行处理...")
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# 使用 spawn 模式避免 CUDA fork 问题
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mp.set_start_method('spawn', force=True)
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# 并行处理
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with mp.Pool(processes=n_processes) as pool:
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results = list(tqdm(
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pool.imap(predict_chunk_worker, chunks),
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total=len(chunks),
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desc="处理进度",
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disable=not verbose
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))
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# 合并结果
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if verbose:
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print("\n📦 合并结果...")
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all_dfs = []
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for chunk_id, output_file, success in sorted(results, key=lambda x: x[0]):
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if success and output_file.exists():
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df = pd.read_csv(output_file)
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all_dfs.append(df)
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if verbose:
|
||
print(f" ✓ part_{chunk_id}.csv: {len(df):,} 行")
|
||
else:
|
||
print(f" ❌ part_{chunk_id}.csv: 失败")
|
||
|
||
df_results = pd.concat(all_dfs, ignore_index=True)
|
||
df_results.to_csv(output_path, index=False)
|
||
|
||
# 统计信息
|
||
elapsed_time = time.time() - start_time
|
||
|
||
if verbose:
|
||
print("\n" + "=" * 80)
|
||
print("✅ 预测完成")
|
||
print("=" * 80)
|
||
print(f"\n📈 统计信息:")
|
||
print(f" 处理分子数: {len(df_results):,}")
|
||
print(f" 总耗时: {elapsed_time:.2f} 秒 ({elapsed_time/60:.2f} 分钟)")
|
||
print(f" 平均速度: {len(df_results)/elapsed_time:.2f} 分子/秒")
|
||
|
||
# 广谱抗菌统计
|
||
n_broad = df_results['broad_spectrum'].sum()
|
||
print(f"\n🎯 预测结果:")
|
||
print(f" 广谱抗菌: {n_broad:,} 个 ({n_broad/len(df_results)*100:.2f}%)")
|
||
print(f" 非广谱: {len(df_results)-n_broad:,} 个")
|
||
|
||
# 抑制菌株数分布
|
||
print(f"\n📊 抑制菌株数分布:")
|
||
for threshold in [0, 5, 10, 15, 20, 30]:
|
||
n = (df_results['ginhib_total'] >= threshold).sum()
|
||
print(f" ≥{threshold:2d} 个菌株: {n:,} ({n/len(df_results)*100:.2f}%)")
|
||
|
||
print("\n" + "=" * 80)
|
||
|
||
if not keep_temp:
|
||
print(f"\n🗑️ 清理临时文件...")
|
||
import shutil
|
||
shutil.rmtree(temp_dir)
|
||
print(f"✓ 已删除: {temp_dir}")
|
||
else:
|
||
print(f"\n📁 临时文件保留在: {temp_dir}")
|
||
|
||
|
||
if __name__ == '__main__':
|
||
main()
|
||
|