feat(training): 添加数据质量检查工具并重构实验脚本
- 新增 check_data_quality 函数用于检测全空/全零/全NaN数据质量问题 - 重构 register_factors 函数,消除 FEATURE_COLS 和 PROCESSORS 冗余定义 - 修复实验脚本中特征列表不一致的问题,确保处理器覆盖所有特征 - 优化 LambdaRank 模型参数配置
This commit is contained in:
File diff suppressed because one or more lines are too long
@@ -31,6 +31,7 @@ from src.training import (
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Winsorizer,
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NullFiller,
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StandardScaler,
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check_data_quality,
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)
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from src.training.components.models import LightGBMLambdaRankModel
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from src.training.config import TrainingConfig
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@@ -39,13 +40,13 @@ from src.training.config import TrainingConfig
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# %% md
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# ## 2. 辅助函数
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# %%
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def create_factors_with_metadata(
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def register_factors(
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engine: FactorEngine,
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selected_factors: List[str],
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factor_definitions: dict,
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label_factor: dict,
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) -> List[str]:
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"""注册因子(SELECTED_FACTORS 从 metadata 查询,FACTOR_DEFINITIONS 用表达式注册)"""
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"""注册因子(selected_factors 从 metadata 查询,factor_definitions 用 DSL 表达式注册)"""
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print("=" * 80)
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print("注册因子")
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print("=" * 80)
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@@ -326,14 +327,18 @@ VAL_END = "20241231"
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TEST_START = "20250101"
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TEST_END = "20251231"
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# 分位数配置
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N_QUANTILES = 20 # 将 label 分为 20 组
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# LambdaRank 模型参数配置
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MODEL_PARAMS = {
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"objective": "lambdarank",
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"metric": "ndcg",
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"ndcg_at": 2, # 评估 NDCG@k
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"ndcg_at": 10, # 评估 NDCG@k
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"learning_rate": 0.01,
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"num_leaves": 31,
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"max_depth": 6,
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"max_depth": 4,
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"min_data_in_leaf": 20,
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"n_estimators": 2000,
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"early_stopping_round": 300,
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@@ -343,21 +348,10 @@ MODEL_PARAMS = {
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"reg_lambda": 1.0,
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"verbose": -1,
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"random_state": 42,
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"lambdarank_truncation_level": 10,
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"label_gain": [i for i in range(1, N_QUANTILES + 1)],
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}
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# 分位数配置
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N_QUANTILES = 20 # 将 label 分为 20 组
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# 特征列(用于数据处理器)
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FEATURE_COLS = SELECTED_FACTORS
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# 数据处理器配置
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PROCESSORS = [
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NullFiller(feature_cols=FEATURE_COLS, strategy="mean"),
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Winsorizer(feature_cols=FEATURE_COLS, lower=0.01, upper=0.99),
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StandardScaler(feature_cols=FEATURE_COLS),
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]
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# 股票池筛选函数
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def stock_pool_filter(df: pl.DataFrame) -> pl.Series:
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@@ -406,7 +400,7 @@ engine = FactorEngine()
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# 2. 使用 metadata 定义因子
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print("\n[2] 定义因子(从 metadata 注册)")
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feature_cols = create_factors_with_metadata(
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feature_cols = register_factors(
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engine, SELECTED_FACTORS, FACTOR_DEFINITIONS, LABEL_FACTOR
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)
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@@ -435,10 +429,14 @@ print(f"[配置] 特征数: {len(feature_cols)}")
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print(f"[配置] 目标变量: {target_col}({N_QUANTILES}分位数)")
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# 6. 创建排序学习模型
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model = LightGBMLambdaRankModel(params=MODEL_PARAMS)
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model: LightGBMLambdaRankModel = LightGBMLambdaRankModel(params=MODEL_PARAMS)
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# 7. 创建数据处理器
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processors = PROCESSORS
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# 7. 创建数据处理器(使用函数返回的完整特征列表)
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processors = [
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NullFiller(feature_cols=feature_cols, strategy="mean"),
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Winsorizer(feature_cols=feature_cols, lower=0.01, upper=0.99),
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StandardScaler(feature_cols=feature_cols),
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]
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# 8. 创建数据划分器
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splitter = DateSplitter(
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@@ -522,7 +520,25 @@ if splitter:
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else:
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raise ValueError("必须配置数据划分器")
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# %% md
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# ### 4.3 数据预处理
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# ### 4.3 数据质量检查
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# %%
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print("\n" + "=" * 80)
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print("数据质量检查(必须在预处理之前)")
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print("=" * 80)
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print("\n检查训练集...")
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check_data_quality(train_data, feature_cols, raise_on_error=True)
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print("\n检查验证集...")
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check_data_quality(val_data, feature_cols, raise_on_error=True)
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print("\n检查测试集...")
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check_data_quality(test_data, feature_cols, raise_on_error=True)
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print("[成功] 数据质量检查通过,未发现异常")
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# %% md
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# ### 4.4 数据预处理
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# %%
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print("\n" + "=" * 80)
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print("数据预处理")
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@@ -584,112 +600,51 @@ print("\n" + "=" * 80)
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print("训练指标曲线")
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print("=" * 80)
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# 重新训练以收集指标(因为之前的训练没有保存评估结果)
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print("\n重新训练模型以收集训练指标...")
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# 从模型获取训练评估结果
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evals_result = model.get_evals_result()
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import lightgbm as lgb
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# 准备数据(使用 val 做验证,test 不参与训练过程)
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X_train_np = X_train.to_numpy()
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y_train_np = y_train.to_numpy()
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X_val_np = val_data.select(feature_cols).to_numpy()
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y_val_np = val_data.select(target_col).to_series().to_numpy()
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# 创建数据集
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train_dataset = lgb.Dataset(X_train_np, label=y_train_np, group=train_group)
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val_dataset = lgb.Dataset(
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X_val_np, label=y_val_np, group=val_group, reference=train_dataset
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)
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# 用于存储评估结果
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evals_result = {}
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# 使用与原模型相同的参数重新训练
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# 正确的三分法:train用于训练,val用于验证,test不参与训练过程
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booster_with_eval = lgb.train(
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MODEL_PARAMS,
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train_dataset,
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num_boost_round=MODEL_PARAMS.get("n_estimators", 1000),
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valid_sets=[train_dataset, val_dataset],
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valid_names=["train", "val"],
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callbacks=[
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lgb.record_evaluation(evals_result),
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lgb.early_stopping(stopping_rounds=50, verbose=True),
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],
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)
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print("训练完成,指标已收集")
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# 获取评估的 NDCG 指标
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ndcg_metrics = [k for k in evals_result["train"].keys() if "ndcg" in k]
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print(f"\n评估的 NDCG 指标: {ndcg_metrics}")
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# 显示早停信息
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actual_rounds = len(list(evals_result["train"].values())[0])
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expected_rounds = MODEL_PARAMS.get("n_estimators", 1000)
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print(f"\n[早停信息]")
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print(f" 配置的最大轮数: {expected_rounds}")
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print(f" 实际训练轮数: {actual_rounds}")
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if actual_rounds < expected_rounds:
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print(f" 早停状态: 已触发(连续50轮验证指标未改善)")
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if evals_result is None or not evals_result:
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print("[警告] 没有可用的训练指标,请确保训练时使用了 eval_set 参数")
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else:
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print(f" 早停状态: 未触发(达到最大轮数)")
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print("[成功] 已从模型获取训练评估结果")
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# 显示各 NDCG 指标的最终值
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print(f"\n最终 NDCG 指标:")
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for metric in ndcg_metrics:
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train_ndcg = evals_result["train"][metric][-1]
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val_ndcg = evals_result["val"][metric][-1]
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print(f" {metric}: 训练集={train_ndcg:.4f}, 验证集={val_ndcg:.4f}")
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# %%
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# 绘制 NDCG 训练指标曲线
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import matplotlib.pyplot as plt
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# 获取评估的 NDCG 指标
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ndcg_metrics = [k for k in evals_result["train"].keys() if "ndcg" in k]
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print(f"\n评估的 NDCG 指标: {ndcg_metrics}")
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fig, axes = plt.subplots(2, 2, figsize=(14, 10))
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axes = axes.flatten()
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# 显示早停信息
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actual_rounds = len(list(evals_result["train"].values())[0])
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expected_rounds = MODEL_PARAMS.get("n_estimators", 1000)
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print(f"\n[早停信息]")
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print(f" 配置的最大轮数: {expected_rounds}")
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print(f" 实际训练轮数: {actual_rounds}")
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for idx, metric in enumerate(ndcg_metrics[:4]): # 最多显示4个NDCG指标
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ax = axes[idx]
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train_metric = evals_result["train"][metric]
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val_metric = evals_result["val"][metric]
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iterations = range(1, len(train_metric) + 1)
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best_iter = model.get_best_iteration()
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if best_iter is not None and best_iter < actual_rounds:
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print(f" 早停状态: 已触发(最佳迭代: {best_iter})")
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else:
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print(f" 早停状态: 未触发(达到最大轮数)")
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ax.plot(
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iterations, train_metric, label=f"Train {metric}", linewidth=2, color="blue"
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)
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ax.plot(iterations, val_metric, label=f"Val {metric}", linewidth=2, color="red")
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ax.set_xlabel("Iteration", fontsize=10)
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ax.set_ylabel(metric.upper(), fontsize=10)
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ax.set_title(
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f"Training and Validation {metric.upper()}", fontsize=12, fontweight="bold"
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)
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ax.legend(fontsize=9)
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ax.grid(True, alpha=0.3)
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# 显示各 NDCG 指标的最终值
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print(f"\n最终 NDCG 指标:")
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for metric in ndcg_metrics:
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train_ndcg = evals_result["train"][metric][-1]
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val_ndcg = evals_result["val"][metric][-1]
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print(f" {metric}: 训练集={train_ndcg:.4f}, 验证集={val_ndcg:.4f}")
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# 标记最佳验证指标点
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best_iter = val_metric.index(max(val_metric))
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best_metric = max(val_metric)
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ax.axvline(x=best_iter + 1, color="green", linestyle="--", alpha=0.7)
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ax.scatter([best_iter + 1], [best_metric], color="green", s=80, zorder=5)
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ax.annotate(
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f"Best: {best_metric:.4f}",
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xy=(best_iter + 1, best_metric),
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xytext=(best_iter + 1 + len(iterations) * 0.05, best_metric),
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fontsize=8,
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arrowprops=dict(arrowstyle="->", color="green", alpha=0.7),
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)
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# 使用封装好的方法绘制所有指标
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print("\n[绘图] 使用 LightGBM 原生接口绘制训练曲线...")
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fig = model.plot_all_metrics(metrics=ndcg_metrics[:4], figsize=(14, 10))
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plt.show()
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plt.tight_layout()
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plt.show()
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print(f"\n[指标分析]")
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print(f" 各NDCG指标在验证集上的最佳值:")
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for metric in ndcg_metrics:
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val_metric_list = evals_result["val"][metric]
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best_iter = val_metric_list.index(max(val_metric_list))
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best_val = max(val_metric_list)
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print(f" {metric}: {best_val:.4f} (迭代 {best_iter + 1})")
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print(f"\n[重要提醒] 验证集仅用于早停/调参,测试集完全独立于训练过程!")
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print(f"\n[指标分析]")
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print(f" 各NDCG指标在验证集上的最佳值:")
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for metric in ndcg_metrics:
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val_metric_list = evals_result["val"][metric]
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best_iter_metric = val_metric_list.index(max(val_metric_list))
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best_val = max(val_metric_list)
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print(f" {metric}: {best_val:.4f} (迭代 {best_iter_metric + 1})")
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print(f"\n[重要提醒] 验证集仅用于早停/调参,测试集完全独立于训练过程!")
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# %% md
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# ### 4.6 模型评估
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# %%
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@@ -18,6 +18,7 @@ from src.training import (
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Trainer,
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Winsorizer,
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NullFiller,
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check_data_quality,
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)
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from src.training.config import TrainingConfig
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@@ -25,13 +26,13 @@ from src.training.config import TrainingConfig
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# %% md
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# ## 2. 定义辅助函数
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# %%
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def create_factors_with_metadata(
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def register_factors(
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engine: FactorEngine,
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selected_factors: List[str],
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factor_definitions: dict,
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label_factor: dict,
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) -> List[str]:
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"""注册因子(SELECTED_FACTORS 从 metadata 查询,FACTOR_DEFINITIONS 用表达式注册)"""
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"""注册因子(selected_factors 从 metadata 查询,factor_definitions 用 DSL 表达式注册)"""
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print("=" * 80)
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print("注册因子")
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print("=" * 80)
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@@ -285,9 +286,6 @@ MODEL_PARAMS = {
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"random_state": 42,
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}
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# 数据处理器配置(新 API:需要传入 feature_cols)
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# 注意:processor 现在需要显式指定要处理的特征列
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# 股票池筛选函数
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# 使用新的 StockPoolManager API:传入自定义筛选函数和所需列/因子
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@@ -355,7 +353,7 @@ engine = FactorEngine(metadata_path="data/factors.jsonl")
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# 2. 使用 metadata 定义因子
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print("\n[2] 定义因子(从 metadata 注册)")
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feature_cols = create_factors_with_metadata(
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feature_cols = register_factors(
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engine, SELECTED_FACTORS, FACTOR_DEFINITIONS, LABEL_FACTOR
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)
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target_col = LABEL_NAME
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@@ -380,7 +378,7 @@ print(f"[配置] 目标变量: {target_col}")
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# 5. 创建模型
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model = LightGBMModel(params=MODEL_PARAMS)
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# 6. 创建数据处理器(新 API:需要传入 feature_cols)
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# 6. 创建数据处理器(使用函数返回的完整特征列表)
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processors = [
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NullFiller(feature_cols=feature_cols, strategy="mean"),
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Winsorizer(feature_cols=feature_cols, lower=0.01, upper=0.99),
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@@ -482,8 +480,26 @@ else:
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test_data = filtered_data
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print(" 未配置划分器,全部作为训练集")
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# %%
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# 步骤 3: 训练集数据处理
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print("\n[步骤 3/6] 训练集数据处理")
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# 步骤 3: 数据质量检查(必须在预处理之前)
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print("\n[步骤 3/7] 数据质量检查")
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print("-" * 60)
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print(" [说明] 此检查在 fillna 等处理之前执行,用于发现数据问题")
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print("\n 检查训练集...")
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check_data_quality(train_data, feature_cols, raise_on_error=True)
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if "val_data" in locals() and val_data is not None:
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print("\n 检查验证集...")
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check_data_quality(val_data, feature_cols, raise_on_error=True)
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print("\n 检查测试集...")
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check_data_quality(test_data, feature_cols, raise_on_error=True)
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print(" [成功] 数据质量检查通过,未发现异常")
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# %%
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# 步骤 4: 训练集数据处理
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print("\n[步骤 4/7] 训练集数据处理")
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print("-" * 60)
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fitted_processors = []
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if processors:
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@@ -510,7 +526,7 @@ for col in feature_cols[:5]: # 只显示前5个特征的缺失值
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print(f" {col}: {null_count} ({null_count / len(train_data) * 100:.2f}%)")
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# %%
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# 步骤 4: 训练模型
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print("\n[步骤 4/6] 训练模型")
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print("\n[步骤 5/7] 训练模型")
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print("-" * 60)
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print(f" 模型类型: LightGBM")
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print(f" 训练样本数: {len(train_data)}")
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@@ -532,7 +548,7 @@ model.fit(X_train, y_train)
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print(" 训练完成!")
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# %%
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# 步骤 5: 测试集数据处理
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print("\n[步骤 5/6] 测试集数据处理")
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print("\n[步骤 6/7] 测试集数据处理")
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print("-" * 60)
|
||||
if processors and test_data is not train_data:
|
||||
for i, processor in enumerate(fitted_processors, 1):
|
||||
@@ -548,7 +564,7 @@ else:
|
||||
print(" 跳过测试集处理")
|
||||
# %%
|
||||
# 步骤 6: 生成预测
|
||||
print("\n[步骤 6/6] 生成预测")
|
||||
print("\n[步骤 7/7] 生成预测")
|
||||
print("-" * 60)
|
||||
X_test = test_data.select(feature_cols)
|
||||
print(f" 测试样本数: {len(X_test)}")
|
||||
|
||||
Reference in New Issue
Block a user