我正在尝试预测一堆商店的每周销售额。我想使用XGBoost，但我总是遇到这个错误：
IndexError: tuple index out of range我的代码：
from sklearn.model_selection import train_test_split
features = ["Store",'Dept','Temperature','Fuel_Price','CPI','Unemployment']
y = allmergecopy.Weekly_Sales
X = allmergecopy[features]
X_train, y_train, X_valid, y_valid = train_test_split(y,X,test_size=.2, train_size=.8)
from xgboost import XGBRegressor
my_model = XGBRegressor(n_estimators=100)
my_model.fit(X_train, y_train)供参考：
y_train.shape = (84314,), X_train.shape = (337256,)。
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