Chap 9, p.248, California housing dataset: "BadZipFile: File is not a zip file" about handson-ml HOT 3 CLOSED

Python 3.5.3 (default, Jan 19 2017, 14:11:04) 
[GCC 6.3.0 20170118] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from sklearn.datasets import fetch_california_housing
>>> housing = fetch_california_housing()
downloading Cal. housing from http://www.dcc.fc.up.pt/~ltorgo/Regression/cal_housing.tgz to /home/ageron/scikit_learn_data
>>> m,n=housing.data.shape
>>> housing_data_plus_bias = np.c_[np.ones((m,1)), housing.data]
>>> housing_data_plus_bias
array([[   1.        ,    8.3252    ,   41.        , ...,    2.55555556,
          37.88      , -122.23      ],
       [   1.        ,    8.3014    ,   21.        , ...,    2.10984183,
          37.86      , -122.22      ],
       [   1.        ,    7.2574    ,   52.        , ...,    2.80225989,
          37.85      , -122.24      ],
       ..., 
       [   1.        ,    1.7       ,   17.        , ...,    2.3256351 ,
          39.43      , -121.22      ],
       [   1.        ,    1.8672    ,   18.        , ...,    2.12320917,
          39.43      , -121.32      ],
       [   1.        ,    2.3886    ,   16.        , ...,    2.61698113,
          39.37      , -121.24      ]])

$ ls -l ~/scikit_learn_data/
total 372
-rw-r--r-- 1 ageron ageron 366877 avril 16 22:37 cal_housing_py3.pkz
drwxr-xr-x 2 ageron ageron   4096 avril  8 14:21 mldata