多重共线性的检验与处理 0 导入&加载数据 import os import tarfile import urllib import urllib.request DOWNLOAD_ROOT = "https://raw.githubusercontent.com/ageron/handson-ml2/master/" HOUSING_PATH = os.path.join("datasets", "housing") # 把目录和文件名合成一个路径 HOUSING_URL = DOWNLOAD_ROOT + "datasets/housing/housing.tgz" def fetch_