title: sklearn.externals joblib throws ImportError - no module named joblib.numpy_pickle on a server
body: <p>I am struggling with a joblib issue.</p>
  
  <p>I need to push inference application to a remote server, and I also need to load a saved standard scaler, because if I try to fit, i get an out of memory exception. I can't make phisical changes to the server, as it is a <strong>sap cloud foundry instance</strong>, and I don't see a way to solve it.</p>
  
  <p><strong>Traceback from server:</strong></p>
  
  <pre><code>   2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR   File "app.py", line 40, in &lt;module&gt;
     2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR     standard_scaler = joblib.load('./datascaler.save')
     2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR   File "/home/vcap/deps/0/python/lib/python2.7/site-packages/sklearn/externals/joblib/numpy_pickle.py", line 598, in load
     2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR     obj = _unpickle(fobj, filename, mmap_mode)
     2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR   File "/home/vcap/deps/0/python/lib/python2.7/site-packages/sklearn/externals/joblib/numpy_pickle.py", line 526, in _unpickle
     2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR     obj = unpickler.load()
     2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR   File "/home/vcap/deps/0/python/lib/python2.7/pickle.py", line 864, in load
     2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR     dispatch[key](self)
     2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR   File "/home/vcap/deps/0/python/lib/python2.7/pickle.py", line 1096, in load_global
     2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR     klass = self.find_class(module, name)
     2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR   File "/home/vcap/deps/0/python/lib/python2.7/pickle.py", line 1130, in find_class
     2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR     __import__(module)
     2019-08-05T15:34:41.54+0200 [APP/PROC/WEB/0] ERR ImportError: No module named joblib.numpy_pickle
  </code></pre>
  
  <p>From what I have seen on similar posts, <strong>joblib version conflict/mismatch</strong> might be a cause, but I can't really do anything with this, since its not my local machine that has this error.</p>
  
  <p>Is there any other way to save the scaler, or to solve this conflict?</p>