Lasso回归

def solve():
    import pandas as pd
    from sklearn.linear_model import Lasso
    from sklearn.model_selection import train_test_split
    df = pd.read_csv(____)
    X = df.drop(____); y = df["____"]
    X_train, X_test, y_train, y_test = train_test_split(____)
    lasso = Lasso(____).fit(____)
    print(____)