222 lines
7.7 KiB
Python
222 lines
7.7 KiB
Python
#!/usr/bin/env python3
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"""训练对话模型——清洗语料 + 可恢复分阶段训练
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策略：
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1. 递归读取 corpus/ 下的本地语料
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2. 清理 markdown/HTML 噪声，过滤过短或过长段落
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3. 同时投喂简体和繁体版本
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4. 统一使用 LanguageTrainingSession 训练、验证和保存
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5. 分阶段降低学习率
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"""
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import torch
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from pathlib import Path
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import time
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import re
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import os
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from jspaceai import (
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LanguageConfig, JSpaceLanguageModel,
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CharTokenizer, load_chinese_corpus,
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build_child_chat_corpus,
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LanguageTrainingConfig, LanguageTrainingSession,
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)
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def get_config(vocab_size: int) -> LanguageConfig:
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return LanguageConfig(
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vocab_size=vocab_size, embed_dim=64, input_dim=32,
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workspace_dim=128, expert_dim=64, num_experts=12, num_wells=8,
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ode_steps=4, dt=0.1, tau_w=0.6, jacobian_sparsity=32, noise_std=0.001,
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use_rk4=True, use_layer_norm=True,
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)
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def _corpus_budget_mb(default: int | None = 64) -> int | None:
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raw = os.environ.get("JSPACE_CORPUS_MAX_MB")
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if raw is None:
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return default
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raw = raw.strip().lower()
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if raw in {"", "0", "all", "none"}:
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return None
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return int(raw)
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def clean_corpus(max_source_mb: int | None = None, use_cache: bool = True) -> str:
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"""构建中文训练语料——读取 corpus/ 下所有文件，繁简双版本同时投喂。
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策略：
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1. 递归读取 corpus/ 目录下的本地语料（默认有读取预算）
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2. 去掉 markdown/HTML 标记（链接、表格、标题符号等），只保留纯文本
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3. 对每段文本同时生成简体版和繁体版，都喂给模型
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4. 加上内嵌唐诗宋词论语（简体连续文本）
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"""
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from opencc import OpenCC
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if max_source_mb is None:
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max_source_mb = _corpus_budget_mb()
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cache_key = "all" if max_source_mb is None else f"{max_source_mb}mb"
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cache_path = Path("outputs/cache") / f"clean_corpus_{cache_key}.txt"
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if use_cache and cache_path.exists():
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return cache_path.read_text(encoding="utf-8")
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cc_s2t = OpenCC('s2t') # 简转繁
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cc_t2s = OpenCC('t2s') # 繁转简
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corpus_dir = Path(__file__).parent / 'corpus'
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raw_paragraphs = []
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source_budget = None if max_source_mb is None else max_source_mb * 1024 * 1024
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bytes_read = 0
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# 1. 内嵌唐诗宋词论语
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for para in load_chinese_corpus().split('\n\n'):
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para = para.strip()
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if para:
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raw_paragraphs.append(para)
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# 2. LCCC 对话语料（最高优先级，真实对话）
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lccc_file = corpus_dir / 'lccc_dialogues.txt'
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if lccc_file.exists():
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lccc_text = lccc_file.read_text(encoding='utf-8')
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for para in lccc_text.split('\n\n'):
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para = para.strip()
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if para:
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raw_paragraphs.append(para)
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# 3. 递归读取 corpus/ 下其他所有文件（教材+百科）
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if corpus_dir.exists():
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for filepath in sorted(corpus_dir.rglob('*')):
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if not filepath.is_file():
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continue
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if source_budget is not None:
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try:
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file_size = filepath.stat().st_size
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except OSError:
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continue
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if bytes_read >= source_budget:
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break
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if file_size > max(1024 * 1024, source_budget - bytes_read):
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continue
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try:
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content = filepath.read_text(encoding='utf-8', errors='ignore')
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except Exception:
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continue
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bytes_read += len(content.encode('utf-8', errors='ignore'))
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# 去 markdown 标记
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content = re.sub(r'\[([^\]]*)\]\([^)]*\)', r'\1', content) # 链接
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content = re.sub(r'^#{1,6}\s+', '', content, flags=re.M) # 标题
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content = re.sub(r'^\|.*\|$', '', content, flags=re.M) # 表格行
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content = re.sub(r'^---+$', '', content, flags=re.M) # 分隔线
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content = re.sub(r'```[^`]*```', '', content, flags=re.S) # 代码块
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content = re.sub(r'\*\*([^*]+)\*\*', r'\1', content) # 粗体
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content = re.sub(r'\*([^*]+)\*', r'\1', content) # 斜体
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content = re.sub(r'^- ', '', content, flags=re.M) # 列表
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# 按空行分段
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for para in content.split('\n\n'):
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para = para.strip()
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if para:
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raw_paragraphs.append(para)
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# 清洗过滤
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cleaned = []
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for para in raw_paragraphs:
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para = re.sub(r'[ \t]+', ' ', para)
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para = re.sub(r'\n{3,}', '\n\n', para)
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para = para.strip()
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if len(para) < 10 or len(para) > 500:
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continue
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# 至少要有一些中文字符
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zh_chars = sum(1 for c in para if len(c) == 1 and ord(c) > 0x4e00)
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if zh_chars < 3:
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continue
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cleaned.append(para)
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# 繁简双版本投喂
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bilingual = []
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for para in cleaned:
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simplified = cc_t2s.convert(para)
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traditional = cc_s2t.convert(simplified)
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bilingual.append(simplified)
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bilingual.append(traditional)
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result = build_child_chat_corpus(repeats=8) + '\n\n' + '\n\n'.join(bilingual)
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if use_cache:
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cache_path.parent.mkdir(parents=True, exist_ok=True)
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cache_path.write_text(result, encoding="utf-8")
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return result
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def main():
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text = clean_corpus()
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print(f"清洗后语料: {len(text)} 字符")
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tok = CharTokenizer.from_text(text, max_vocab=3000) # 覆盖98.9%文本
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cfg = get_config(tok.vocab_size)
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model = JSpaceLanguageModel(cfg)
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print(f"vocab={tok.vocab_size}, params={sum(p.numel() for p in model.parameters()):,}")
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all_tokens = tok.encode(text)
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# 加载已有模型
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mp = Path('outputs/chat_model.pt')
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if mp.exists():
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try:
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ckpt = torch.load(mp, map_location='cpu', weights_only=False)
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if ckpt['config'].vocab_size == cfg.vocab_size:
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model.load_state_dict(ckpt['model'])
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print(f"已加载: {mp}")
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except Exception:
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print("加载失败，全新训练")
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prompts = ['学而时习之', '床前明月光', '學而時習之', '春天', '人']
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stages = [
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(3e-3, 500, "快速下降"),
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(1e-3, 500, "稳定收敛"),
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(5e-4, 500, "精调"),
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(2e-4, 500, "最终精调"),
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]
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t_total = time.time()
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for lr, n_steps, label in stages:
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print(f"\n{'='*60}")
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print(f"阶段: {label} | lr={lr} | {n_steps}步")
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print(f"{'='*60}")
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train_cfg = LanguageTrainingConfig(
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seq_len=64,
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batch_size=8,
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lr=lr,
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ewc_lambda=0.05,
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consolidate_every=100,
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validate_every=100,
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save_every=100,
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use_euler_during_train=True,
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)
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trainer = LanguageTrainingSession(
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model, cfg, tok, train_cfg, device='cpu',
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)
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def report(stats: dict):
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if stats['step'] % 100 != 0:
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return
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val = f" val={stats['val_loss']:.3f}" if "val_loss" in stats else ""
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print(f"\n step {stats['step']:3d} | loss {stats['loss']:.3f}{val}")
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model.eval()
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for prompt in prompts:
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generated = model.generate(tok.encode(prompt) or [0], n_new=40, temperature=0.7, top_k=5)
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print(f" [{prompt}] {repr((prompt + tok.decode(generated))[:60])}")
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model.train()
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trainer.fit_tokens(
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all_tokens,
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max_steps=n_steps,
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checkpoint_path=mp,
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on_progress=report,
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)
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print(f"\n完成，总耗时 {time.time()-t_total:.0f}s，已保存到 outputs/chat_model.pt")
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if __name__ == '__main__':
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main()
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