Python 数据类型和长度检查，并使用 train_test_split 分割数据

print(type(data)) print(len(data)) print("For Distance = 2") print(type(labels)) print(len(labels)) X_train, X_test, y_train, y_test = train_test_split(data, labels, test_size=0.2, random_state=42)