KNN-特征重要性分析

def solve():
    import pandas as pd
    from sklearn.neighbors import KNeighborsClassifier
    from sklearn.model_selection import train_test_split
    from sklearn.metrics import accuracy_score
    df = pd.read_csv(____)
    y = df['____']
    features = ['____', '____', '____', '____']
    for feat in features:
        X = df[[feat]]
        X_train, X_test, y_train, y_test = train_test_split(____)
        knn = KNeighborsClassifier(____)
        knn.fit(____)
        acc = accuracy_score(y_test, knn.predict(____))
        print(____)