python
步骤1:导入必要的库
from sklearn.model_selection import train_test_split
from sklearn.linear_model import LogisticRegression
from sklearn.metrics import accuracy_score, classification_report
from sklearn.datasets import load_iris
from sklearn.preprocessing import StandardScaler
步骤2:加载数据并准备
iris = load_iris()
X = iris.data
y = iris.target