Download dataset_code/sekai/preprocess/merge_csv.py from SuperCS/useful_code: direct link, hf CLI and curl.
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https://huggingface.co/datasets/SuperCS/useful_code/resolve/80e15b44f299247edcd020061ecbaa4bf18e2c49/dataset_code/sekai/preprocess/merge_csv.py
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curl -L -o merge_csv.py https://huggingface.co/datasets/SuperCS/useful_code/resolve/80e15b44f299247edcd020061ecbaa4bf18e2c49/dataset_code/sekai/preprocess/merge_csv.py
7.84 kB
| import pandas as pd | |
| import os | |
| import glob | |
| from pathlib import Path | |
| from concurrent.futures import ThreadPoolExecutor, as_completed | |
| from tqdm import tqdm | |
| import threading | |
| from functools import partial | |
| def read_single_csv(file_path, expected_columns=None): | |
| """ | |
| 读取单个CSV文件的辅助函数 | |
| Args: | |
| file_path (str): CSV文件路径 | |
| expected_columns (list): 期望的列名列表 | |
| Returns: | |
| tuple: (DataFrame或None, 文件名, 错误信息或None) | |
| """ | |
| try: | |
| df = pd.read_csv(file_path) | |
| # 检查列是否一致 | |
| if expected_columns and df.columns.tolist() != expected_columns: | |
| return None, os.path.basename(file_path), f"列结构不一致" | |
| return df, os.path.basename(file_path), None | |
| except Exception as e: | |
| return None, os.path.basename(file_path), str(e) | |
| def merge_single_row_csvs(folder_path, output_file='merged_data.csv', max_workers=None): | |
| """ | |
| 使用多线程合并文件夹中所有单行CSV文件为一个大的CSV文件 | |
| Args: | |
| folder_path (str): 包含CSV文件的文件夹路径 | |
| output_file (str): 输出文件名 | |
| max_workers (int): 最大线程数,默认为None(使用系统默认值) | |
| """ | |
| # 获取文件夹中所有CSV文件 | |
| csv_files = glob.glob(os.path.join(folder_path, "*.csv")) | |
| if not csv_files: | |
| print("文件夹中没有找到CSV文件") | |
| return | |
| print(f"找到 {len(csv_files)} 个CSV文件") | |
| # 读取第一个文件获取列名 | |
| try: | |
| first_df = pd.read_csv(csv_files[0]) | |
| expected_columns = first_df.columns.tolist() | |
| print(f"期望的列结构: {expected_columns}") | |
| except Exception as e: | |
| print(f"无法读取第一个文件: {str(e)}") | |
| return | |
| # 存储所有数据的列表 | |
| all_data = [] | |
| failed_files = [] | |
| # 创建部分函数,预设expected_columns参数 | |
| read_csv_partial = partial(read_single_csv, expected_columns=expected_columns) | |
| # 使用ThreadPoolExecutor进行多线程处理 | |
| print("开始多线程读取文件...") | |
| with ThreadPoolExecutor(max_workers=max_workers) as executor: | |
| # 提交所有任务 | |
| future_to_file = {executor.submit(read_csv_partial, file_path): file_path | |
| for file_path in csv_files} | |
| # 使用tqdm显示进度并收集结果 | |
| with tqdm(total=len(csv_files), desc="读取CSV文件") as pbar: | |
| for future in as_completed(future_to_file): | |
| df, filename, error = future.result() | |
| if df is not None: | |
| all_data.append(df) | |
| else: | |
| failed_files.append((filename, error)) | |
| pbar.update(1) | |
| # 在进度条描述中显示成功/失败统计 | |
| pbar.set_postfix({ | |
| '成功': len(all_data), | |
| '失败': len(failed_files) | |
| }) | |
| # 显示处理结果 | |
| print(f"\n处理完成:") | |
| print(f"成功读取: {len(all_data)} 个文件") | |
| print(f"失败: {len(failed_files)} 个文件") | |
| if failed_files: | |
| print("\n失败的文件:") | |
| for filename, error in failed_files[:10]: # 只显示前10个错误 | |
| print(f" {filename}: {error}") | |
| if len(failed_files) > 10: | |
| print(f" ... 还有 {len(failed_files) - 10} 个失败的文件") | |
| if not all_data: | |
| print("没有成功读取任何数据") | |
| return | |
| # 合并所有数据 | |
| print("\n正在合并数据...") | |
| with tqdm(desc="合并数据") as pbar: | |
| merged_df = pd.concat(all_data, ignore_index=True) | |
| pbar.update(1) | |
| # 保存合并后的数据 | |
| print("正在保存文件...") | |
| with tqdm(desc="保存文件") as pbar: | |
| merged_df.to_csv(output_file, index=False) | |
| pbar.update(1) | |
| print(f"\n✅ 合并完成!") | |
| print(f"共 {len(merged_df)} 行数据已保存到 {output_file}") | |
| # 显示数据概览 | |
| print(f"\n📊 数据概览:") | |
| print(f"总行数: {len(merged_df):,}") | |
| print(f"总列数: {len(merged_df.columns)}") | |
| print(f"文件大小: {os.path.getsize(output_file) / 1024 / 1024:.2f} MB") | |
| print(f"列名: {list(merged_df.columns)}") | |
| # 显示前几行数据 | |
| print(f"\n📝 数据预览:") | |
| print(merged_df.head()) | |
| def merge_with_batch_processing(folder_path, output_file='merged_data.csv', | |
| batch_size=1000, max_workers=None): | |
| """ | |
| 使用批处理的方式合并大量CSV文件,减少内存占用 | |
| Args: | |
| folder_path (str): 包含CSV文件的文件夹路径 | |
| output_file (str): 输出文件名 | |
| batch_size (int): 每批处理的文件数量 | |
| max_workers (int): 最大线程数 | |
| """ | |
| csv_files = glob.glob(os.path.join(folder_path, "*.csv")) | |
| if not csv_files: | |
| print("文件夹中没有找到CSV文件") | |
| return | |
| print(f"找到 {len(csv_files)} 个CSV文件,将分批处理") | |
| # 读取第一个文件获取列名 | |
| try: | |
| first_df = pd.read_csv(csv_files[0]) | |
| expected_columns = first_df.columns.tolist() | |
| except Exception as e: | |
| print(f"无法读取第一个文件: {str(e)}") | |
| return | |
| # 分批处理文件 | |
| total_rows = 0 | |
| is_first_batch = True | |
| with tqdm(total=len(csv_files), desc="总进度") as main_pbar: | |
| for i in range(0, len(csv_files), batch_size): | |
| batch_files = csv_files[i:i + batch_size] | |
| batch_data = [] | |
| # 处理当前批次 | |
| read_csv_partial = partial(read_single_csv, expected_columns=expected_columns) | |
| with ThreadPoolExecutor(max_workers=max_workers) as executor: | |
| future_to_file = {executor.submit(read_csv_partial, file_path): file_path | |
| for file_path in batch_files} | |
| for future in as_completed(future_to_file): | |
| df, filename, error = future.result() | |
| if df is not None: | |
| batch_data.append(df) | |
| main_pbar.update(1) | |
| # 合并当前批次数据 | |
| if batch_data: | |
| batch_df = pd.concat(batch_data, ignore_index=True) | |
| # 保存到文件(追加模式) | |
| mode = 'w' if is_first_batch else 'a' | |
| header = is_first_batch | |
| batch_df.to_csv(output_file, mode=mode, header=header, index=False) | |
| total_rows += len(batch_df) | |
| is_first_batch = False | |
| print(f"\n批次 {i//batch_size + 1} 完成,添加了 {len(batch_df)} 行") | |
| print(f"\n✅ 所有批次处理完成!总共 {total_rows} 行数据保存到 {output_file}") | |
| # 使用示例 | |
| if __name__ == "__main__": | |
| folder_path = "/mnt/bn/yufan-dev-my/ysh/Ckpts/Lixsp11/0_final_sekai_dataset/yamls/sekai-game-walking-386" | |
| output_file = "/mnt/bn/yufan-dev-my/ysh/Ckpts/Lixsp11/0_final_sekai_dataset/yamls/sekai-game-walking-386.csv" | |
| # 方法1: 标准多线程合并(推荐用于中等大小的数据集) | |
| merge_single_row_csvs( | |
| folder_path=folder_path, | |
| output_file=output_file, | |
| max_workers=8 # 可以根据你的CPU核心数调整 | |
| ) | |
| # 方法2: 批处理合并(推荐用于大型数据集,节省内存) | |
| # merge_with_batch_processing( | |
| # folder_path=folder_path, | |
| # output_file=output_file, | |
| # batch_size=1000, | |
| # max_workers=8 | |
| # ) | |