MAINT drop python 2 and upgrade scikit-learn 0.21 (#576)

Author: glemaitre

.travis.yml

@@ -1,5 +1,5 @@
 # make it explicit that we favor the new container-based travis workers
-dist: trusty
+dist: xenial
 sudo: false
 
 language: python
@@ -16,8 +16,8 @@ cache:
 addons:
   apt:
     packages:
-      - python-numpy
-      - python-scipy
+      - python3-numpy
+      - python3-scipy
 env:
   global:
     # Directory where tests are run from
@@ -32,12 +32,10 @@ matrix:
     # Ubuntu 14.04 environment
     - env: DISTRIB="ubuntu"
     # Latest release
-    - env: DISTRIB="conda" PYTHON_VERSION="2.7"
-           NUMPY_VERSION="1.13.1" SCIPY_VERSION="0.19.1" SKLEARN_VERSION="0.20"
     - env: DISTRIB="conda" PYTHON_VERSION="3.6"
-           NUMPY_VERSION="*" SCIPY_VERSION="*" SKLEARN_VERSION="0.20"
+           NUMPY_VERSION="*" SCIPY_VERSION="*" SKLEARN_VERSION="0.21"
     - env: DISTRIB="conda" PYTHON_VERSION="3.7"
-           NUMPY_VERSION="1.13.1" SCIPY_VERSION="0.19.1" SKLEARN_VERSION="0.20"
+           NUMPY_VERSION="1.13.1" SCIPY_VERSION="0.19.1" SKLEARN_VERSION="0.21"
     - env: DISTRIB="conda" PYTHON_VERSION="3.7"
            NUMPY_VERSION="*" SCIPY_VERSION="*" SKLEARN_VERSION="master"
   allow_failures:

README.rst

@@ -52,20 +52,18 @@ Installation
 Dependencies
 ~~~~~~~~~~~~
 
-imbalanced-learn is tested to work under Python 2.7 and Python 3.6, and
-3.7. The dependency requirements are based on the last scikit-learn release:
+imbalanced-learn is tested to work under Python 3.6+.
+The dependency requirements are based on the last scikit-learn release:
 
-* scipy(>=0.13.3)
-* numpy(>=1.8.2)
-* scikit-learn(>=0.20)
+* scipy(>=0.17)
+* numpy(>=1.11)
+* scikit-learn(>=0.21)
 * keras 2 (optional)
 * tensorflow (optional)
 
 Additionally, to run the examples, you need matplotlib(>=2.0.0) and
 pandas(>=0.22).
 
-**imbalanced-learn 0.4 is the last version to support Python 2.7**
-
 Installation
 ~~~~~~~~~~~~
 

appveyor.yml

@@ -7,16 +7,6 @@ environment:
   # We run the tests on 2 different target platforms for testing purpose only.
   # We use miniconda versions of Python provided by appveyor windows images
   matrix:
-    - PYTHON: "C:\\Miniconda-x64"
-      PYTHON_VERSION: "2.7"
-      PYTHON_ARCH: "64"
-      OPTIONAL_DEP: "pandas"
-
-    - PYTHON: "C:\\Miniconda"
-      PYTHON_VERSION: "2.7"
-      PYTHON_ARCH: "32"
-      OPTIONAL_DEP: "pandas"
-
     - PYTHON: "C:\\Miniconda36-x64"
       PYTHON_VERSION: "3.6"
       PYTHON_ARCH: "64"

build_tools/travis/install.sh

@@ -64,12 +64,12 @@ elif [[ "$DISTRIB" == "ubuntu" ]]; then
     # install.
     deactivate
     # Create a new virtualenv using system site packages for python, numpy
-    virtualenv --system-site-packages testvenv
+    virtualenv --system-site-packages --python=python3 testvenv
     source testvenv/bin/activate
 
-    pip install scikit-learn
-    pip install pandas keras tensorflow
-    pip install pytest pytest-cov codecov sphinx numpydoc
+    pip3 install scikit-learn
+    pip3 install pandas keras tensorflow
+    pip3 install pytest pytest-cov codecov sphinx numpydoc
 
 fi
 

doc/conf.py

@@ -15,7 +15,6 @@
 import os
 import sys
 import sphinx_rtd_theme
-from sklearn.externals.six import u
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -76,8 +75,8 @@
 master_doc = 'index'
 
 # General information about the project.
-project = u('imbalanced-learn')
-copyright = u('2016 - 2017, G. Lemaitre, F. Nogueira, D. Oliveira, C. Aridas')
+project = 'imbalanced-learn'
+copyright = '2016 - 2017, G. Lemaitre, F. Nogueira, D. Oliveira, C. Aridas'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -231,8 +230,8 @@
 # (source start file, target name, title,
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
-    ('index', 'imbalanced-learn.tex', u('imbalanced-learn Documentation'),
-     u('G. Lemaitre, F. Nogueira, D. Oliveira, C. Aridas'), 'manual'),
+    ('index', 'imbalanced-learn.tex', 'imbalanced-learn Documentation',
+     'G. Lemaitre, F. Nogueira, D. Oliveira, C. Aridas', 'manual'),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
@@ -278,8 +277,8 @@
 
 # One entry per manual page. List of tuples
 # (source start file, name, description, authors, manual section).
-man_pages = [('index', 'imbalanced-learn', u'imbalanced-learn Documentation',
-              [u'G. Lemaitre, F. Nogueira, D. Oliveira, C. Aridas'], 1)]
+man_pages = [('index', 'imbalanced-learn', 'imbalanced-learn Documentation',
+              ['G. Lemaitre, F. Nogueira, D. Oliveira, C. Aridas'], 1)]
 
 # If true, show URL addresses after external links.
 # man_show_urls = False
@@ -290,8 +289,8 @@
 # (source start file, target name, title, author,
 #  dir menu entry, description, category)
 texinfo_documents = [
-    ('index', 'imbalanced-learn', u'imbalanced-learn Documentation',
-     u'G. Lemaitre, F. Nogueira, D. Oliveira, C. Aridas', 'imbalanced-learn',
+    ('index', 'imbalanced-learn', 'imbalanced-learn Documentation',
+     'G. Lemaitre, F. Nogueira, D. Oliveira, C. Aridas', 'imbalanced-learn',
      'Toolbox for imbalanced dataset in machine learning.', 'Miscellaneous'),
 ]
 
@@ -332,6 +331,6 @@ def setup(app):
 
 # The following is used by sphinx.ext.linkcode to provide links to github
 linkcode_resolve = make_linkcode_resolve('imblearn',
-                                         u'https://github.com/scikit-learn-contrib/'
+                                         'https://github.com/scikit-learn-contrib/'
                                          'imbalanced-learn/blob/{revision}/'
                                          '{package}/{path}#L{lineno}')

doc/install.rst

@@ -7,16 +7,12 @@ Prerequisites
 
 The imbalanced-learn package requires the following dependencies:
 
-* numpy (>=1.8.2)
-* scipy (>=0.13.3)
-* scikit-learn (>=0.20)
+* numpy (>=1.11)
+* scipy (>=0.17)
+* scikit-learn (>=0.21)
 * keras 2 (optional)
 * tensorflow (optional)
 
-Our release policy is to follow the scikit-learn releases in order to
-synchronize the new feature. **imbalanced-learn 0.4 is the last version to
-support Python 2.7**
-
 Install
 =======