XGBoostError: Check failed: typestr.size() == 3 (2 vs. 3) : `typestr' should be of format <endian><type><size of type in bytes>

XGBoostError: Check failed: typestr.size() == 3 (2 vs. 3) : `typestr' should be of format <endian><type><size of type in bytes>

我在新安装 xgboost 时遇到了一个奇怪的问题。在正常情况下，它工作正常。但是，当我在以下函数中使用该模型时，它给出了标题中的错误。

我使用的数据集是从kaggle借来的，可以在这里看到：https://www.kaggle.com/kemical/kickstarter-projects

我用来拟合模型的函数如下：

def get_val_scores(model, X, y, return_test_score=False, return_importances=False, random_state=42, randomize=True, cv=5, test_size=0.2, val_size=0.2, use_kfold=False, return_folds=False, stratify=True):
    print("Splitting data into training and test sets")
    if randomize:
        if stratify:
            X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=test_size, stratify=y, shuffle=True, random_state=random_state)
        else:
            X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=test_size, shuffle=True, random_state=random_state)
    else:
        if stratify:
            X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=test_size, stratify=y, shuffle=False)
        else:
            X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=test_size, shuffle=False)
    print(f"Shape of training data, X: {X_train.shape}, y: {y_train.shape}.  Test, X: {X_test.shape}, y: {y_test.shape}")
    if use_kfold:
        val_scores = cross_val_score(model, X=X_train, y=y_train, cv=cv)
    else:
        print("Further splitting training data into validation sets")
        if randomize:
            if stratify:
                X_train_, X_val, y_train_, y_val = train_test_split(X_train, y_train, test_size=val_size, stratify=y_train, shuffle=True)
            else:
                X_train_, X_val, y_train_, y_val = train_test_split(X_train, y_train, test_size=val_size, shuffle=True)
        else:
            if stratify:
                print("Warning! You opted to both stratify your training data and to not randomize it.  These settings are incompatible with scikit-learn.  Stratifying the data, but shuffle is being set to True")
                X_train_, X_val, y_train_, y_val = train_test_split(X_train, y_train, test_size=val_size, stratify=y_train,  shuffle=True)
            else:
                X_train_, X_val, y_train_, y_val = train_test_split(X_train, y_train, test_size=val_size, shuffle=False)
        print(f"Shape of training data, X: {X_train_.shape}, y: {y_train_.shape}.  Val, X: {X_val.shape}, y: {y_val.shape}")
        print("Getting ready to fit model.")
        model.fit(X_train_, y_train_)
        val_score = model.score(X_val, y_val)
        
    if return_importances:
        if hasattr(model, 'steps'):
            try:
                feats = pd.DataFrame({
                    'Columns': X.columns,
                    'Importance': model[-2].feature_importances_
                }).sort_values(by='Importance', ascending=False)
            except:
                model.fit(X_train, y_train)
                feats = pd.DataFrame({
                    'Columns': X.columns,
                    'Importance': model[-2].feature_importances_
                }).sort_values(by='Importance', ascending=False)
        else:
            try:
                feats = pd.DataFrame({
                    'Columns': X.columns,
                    'Importance': model.feature_importances_
                }).sort_values(by='Importance', ascending=False)
            except:
                model.fit(X_train, y_train)
                feats = pd.DataFrame({
                    'Columns': X.columns,
                    'Importance': model.feature_importances_
                }).sort_values(by='Importance', ascending=False)
            
    mod_scores = {}
    try:
        mod_scores['validation_score'] = val_scores.mean()
        if return_folds:
            mod_scores['fold_scores'] = val_scores
    except:
        mod_scores['validation_score'] = val_score
        
    if return_test_score:
        mod_scores['test_score'] =  model.score(X_test, y_test)
            
    if return_importances:
        return mod_scores, feats
    else:
        return mod_scores

我 运行 的奇怪之处在于，如果我在 sklearn 中创建一个管道，它会在函数外部的数据集上运行，但不会在函数内部运行。例如：

from sklearn.pipeline import make_pipeline
from category_encoders import OrdinalEncoder
from xgboost import XGBClassifier

pipe = make_pipeline(OrdinalEncoder(), XGBClassifier())

X = df.drop('state', axis=1)
y = df['state']

在这种情况下，pipe.fit(X, y) 工作得很好。但是 get_val_scores(pipe, X, y) 失败并在标题中显示错误消息。更奇怪的是 get_val_scores(pipe, X, y) 似乎适用于其他数据集，例如泰坦尼克号。当模型拟合 X_train 和 y_train.

时出现错误

在这种情况下，损失函数为 binary:logistic，state 列的值为 successful 和 failed。

xgboost 库目前正在更新以修复此错误，因此当前的解决方案是将库降级到旧版本，对我来说，我已经通过降级到 xgboost v0.90 解决了这个问题

尝试通过cmd检查你的xgboost版本：

python 

import xgboost

print(xgboost.__version__)

exit()

如果版本不是 0.90 则通过以下方式卸载当前版本：

pip uninstall xgboost

安装 xgboost 版本 0.90

pip install xgboost==0.90

运行 又是你的代码！

我在 macOS Big Sur 上使用 python 3.8.6，刚刚遇到 xgboost==1.4.0 和 1.4.1 的错误。当我降级到 1.3.3 时，问题就消失了。根据您当前的版本尝试升级或降级。

此错误将在 XGBoost 1.4.2 中修复

参见：https://github.com/dmlc/xgboost/pull/6927

我也遇到过同样的错误；但就我而言，通过将 bool 列转换为 numeric.

解决了错误