# 导入必要的库
import pandas as pd
from sklearn.model_selection import train_test_split
from sklearn.linear_model import LinearRegression

# 加载数据
data = pd.read_csv("data.csv")

# 将数据分成训练集和测试集
X_train, X_test, y_train, y_test = train_test_split(data.drop("target", axis=1), data["target"], test_size=0.2, random_state=42)

# 创建线性回归模型
model = LinearRegression()

# 训练模型
model.fit(X_train, y_train)

# 评估模型
score = model.score(X_test, y_test)

# 打印模型得分
print("模型得分：", score)