Python: fix deprecated joblib (#2068)

* Import modules in init and fix deprecated joblib

* revert init chanage

* Update build-linux.yml

* Update .travis.yml

* Update .travis.yml

* Update .travis.yml

* Update build-linux.yml

* Update build-linux.yml

.pipelines/build-linux.yml

@@ -5,7 +5,7 @@ pool:
   vmImage: 'ubuntu-16.04'
 
 container:
-  image: vowpalwabbit/ubuntu1604-build:0.1.0
+  image: vowpalwabbit/ubuntu1604-build:0.3.0
   endpoint: DockerHub
 
 steps:

.travis.yml

@@ -4,9 +4,9 @@ services:
   - docker
 
 before_install:
-  - docker pull vowpalwabbit/ubuntu1404-build:0.1.0
+  - docker pull vowpalwabbit/ubuntu1404-build:0.1.1
 script:
-  - docker run -a STDOUT -v `pwd`:/vw -t vowpalwabbit/ubuntu1404-build:0.1.0 /bin/bash -c "cd /vw && chmod +x ./build-linux.sh && ./build-linux.sh"
+  - docker run -a STDOUT -v `pwd`:/vw -t vowpalwabbit/ubuntu1404-build:0.1.1 /bin/bash -c "cd /vw && chmod +x ./build-linux.sh && ./build-linux.sh"
 
 after_success:
-  - docker run -e TRAVIS_JOB_ID -e TRAVIS_BRANCH -a STDOUT -v `pwd`:/vw -t vowpalwabbit/ubuntu1404-build:0.1.0 /bin/bash -c "cd /vw && coveralls --include explore --include vowpalwabbit --gcov-options '\-lp'"
+  - docker run -e TRAVIS_JOB_ID -e TRAVIS_BRANCH -a STDOUT -v `pwd`:/vw -t vowpalwabbit/ubuntu1404-build:0.1.1 /bin/bash -c "cd /vw && coveralls --include explore --include vowpalwabbit --gcov-options '\-lp'"

python/vowpalwabbit/sklearn_vw.py

@@ -12,7 +12,7 @@
 from sklearn.datasets.svmlight_format import dump_svmlight_file
 from sklearn.utils.validation import check_is_fitted
 from sklearn.utils import shuffle
-from sklearn.externals import joblib
+import joblib
 from vowpalwabbit import pyvw
 
 

requirements.txt

@@ -1,3 +1,4 @@
 numpy>=1.6.1
 scipy>=0.9
 scikit-learn>=0.17
+joblib>=0.10.3