特征选择-卡方检验

def solve():
    from sklearn.datasets import load_iris
    from sklearn.feature_selection import SelectKBest, chi2
    from sklearn.preprocessing import MinMaxScaler
    iris = load_iris()
    X = iris.data
    y = iris.target
    scaler = MinMaxScaler()
    X_s = scaler.fit_transform(____)
    selector = SelectKBest(____)
    X_selected = selector.fit_transform(____)
    print(____)