网格搜索调参

def solve():
    from sklearn.datasets import load_iris
    from sklearn.model_selection import GridSearchCV
    from sklearn.svm import SVC
    from sklearn.preprocessing import StandardScaler
    iris = load_iris()
    X = iris.data
    y = iris.target
    scaler = StandardScaler()
    X_s = scaler.fit_transform(____)
    params = {'____': [____, ____, ____], '____': ['____', '____']}
    grid = GridSearchCV(SVC(____), params, cv=____)
    grid.fit(____)
    print(____)