Removed Python 2.6 support and related checks

.travis.yml

@@ -37,8 +37,6 @@ notifications:
 
 matrix:
   include:
-    - python: 2.6
-      env: WITH_PYAMG=1 NO_SPHINX=1
     - python: 2.7
       env: PIP_FLAGS="--pre"
     - python: 2.7

DEPENDS.txt

@@ -1,14 +1,14 @@
 Build Requirements
 ------------------
-* `Python >= 2.6 <http://python.org>`__
+* `Python >= 2.7 <http://python.org>`__
 * `Numpy >= 1.7.2 <http://numpy.scipy.org/>`__
 * `Cython >= 0.23 <http://www.cython.org/>`__
 * `Six >=1.4 <https://pypi.python.org/pypi/six>`__
 * `SciPy >=0.9 <http://scipy.org>`__
 
 Runtime requirements
 --------------------
-* `Python >= 2.6 <http://python.org>`__
+* `Python >= 2.7 <http://python.org>`__
 * `Numpy >= 1.7.2 <http://numpy.scipy.org/>`__
 * `SciPy >= 0.9 <http://scipy.org>`__
 * `Matplotlib >= 1.1.0 <http://matplotlib.sf.net>`__

TODO.txt

@@ -21,8 +21,6 @@ Version 0.14
 
 Version 0.13
 ------------
-* Require Python 2.7+, remove warning in `__init__.py` and 2.6 hack in
-  `doc/release/contribs.py`.
 * Remove deprecated `None` defaults for `skimage.exposure.rescale_intensity`
 * Remove deprecated edge filters `hsobel`, `vsobel`, `hscharr`, `vscharr`,
   `hprewitt`, `vprewitt`, `roberts_positive_diagonal`,

doc/release/contribs.py

@@ -10,45 +10,41 @@
 
 tag = sys.argv[1]
 
+def call(cmd):
+    return subprocess.check_output(shlex.split(cmd), universal_newlines=True).split('\n')
 
-if not sys.version_info[:2] == (2, 6):
+tag_date = call("git show --format='%%ci' %s" % tag)[0]
+print("Release %s was on %s\n" % (tag, tag_date))
 
-    def call(cmd):
-        return subprocess.check_output(shlex.split(cmd), universal_newlines=True).split('\n')
+merges = call("git log --since='%s' --merges --format='>>>%%B' --reverse" % tag_date)
+merges = [m for m in merges if m.strip()]
+merges = '\n'.join(merges).split('>>>')
+merges = [m.split('\n')[:2] for m in merges]
+merges = [m for m in merges if len(m) == 2 and m[1].strip()]
 
-    tag_date = call("git show --format='%%ci' %s" % tag)[0]
-    print("Release %s was on %s\n" % (tag, tag_date))
+num_commits = call("git rev-list %s..HEAD --count" % tag)[0]
+print("A total of %s changes have been committed.\n" % num_commits)
 
-    merges = call("git log --since='%s' --merges --format='>>>%%B' --reverse" % tag_date)
-    merges = [m for m in merges if m.strip()]
-    merges = '\n'.join(merges).split('>>>')
-    merges = [m.split('\n')[:2] for m in merges]
-    merges = [m for m in merges if len(m) == 2 and m[1].strip()]
+print("It contained the following %d merges:\n" % len(merges))
+for (merge, message) in merges:
+    if merge.startswith('Merge pull request #'):
+        PR = ' (%s)' % merge.split()[3]
+    else:
+        PR = ''
 
-    num_commits = call("git rev-list %s..HEAD --count" % tag)[0]
-    print("A total of %s changes have been committed.\n" % num_commits)
+    print('- ' + message + PR)
 
-    print("It contained the following %d merges:\n" % len(merges))
-    for (merge, message) in merges:
-        if merge.startswith('Merge pull request #'):
-            PR = ' (%s)' % merge.split()[3]
-        else:
-            PR = ''
+print("\nMade by the following committers [alphabetical by last name]:\n")
 
-        print('- ' + message + PR)
+authors = call("git log --since='%s' --format=%%aN" % tag_date)
+authors = [a.strip() for a in authors if a.strip()]
 
+def key(author):
+    author = [v for v in author.split() if v[0] in string.ascii_letters]
+    if len(author) > 0:
+        return author[-1]
 
-    print("\nMade by the following committers [alphabetical by last name]:\n")
+authors = sorted(set(authors), key=key)
 
-    authors = call("git log --since='%s' --format=%%aN" % tag_date)
-    authors = [a.strip() for a in authors if a.strip()]
-
-    def key(author):
-        author = [v for v in author.split() if v[0] in string.ascii_letters]
-        if len(author) > 0:
-            return author[-1]
-
-    authors = sorted(set(authors), key=key)
-
-    for a in authors:
-        print('- ' + a)
+for a in authors:
+    print('- ' + a)

doc/release/release_dev.txt

@@ -33,6 +33,8 @@ API Changes
 Deprecations
 ------------
 
+- Python 2.6 support has been dropped. Minimal required Python version is 2.7.
+
 
 Contributors to this release
 ----------------------------

optional_requirements.txt

@@ -3,4 +3,4 @@ imread; python_version != '2.7'
 SimpleITK; python_version != '3.4' and python_version != '3.5'
 astropy
 tifffile
-imageio; python_version != '2.6'
+imageio

skimage/__init__.py

@@ -157,10 +157,4 @@ def _raise_build_error(e):
     from .util.dtype import *
 
 
-if sys.version.startswith('2.6'):
-    msg = ("Python 2.6 is deprecated and will not be supported in "
-           "scikit-image 0.13+")
-    warnings.warn(msg, stacklevel=2)
-
-
 del warnings, functools, osp, imp, sys

skimage/_shared/tests/test_version_requirements.py

@@ -15,14 +15,13 @@ def test_get_module_version():
 
 
 def test_is_installed():
-    assert version_req.is_installed('python', '>=2.6')
+    assert version_req.is_installed('python', '>=2.7')
     assert not version_req.is_installed('numpy', '<1.0')
 
 
 def test_require():
-
-    # A function that only runs on Python >2.6 and numpy > 1.5 (should pass)
-    @version_req.require('python', '>2.6')
+    # A function that only runs on Python >2.7 and numpy > 1.5 (should pass)
+    @version_req.require('python', '>2.7')
     @version_req.require('numpy', '>1.5')
     def foo():
         return 1

tools/travis_before_install.sh

@@ -32,13 +32,6 @@ retry () {
 # add build dependencies
 echo "cython>=0.23.4" >> requirements.txt
 
-# require networkx 1.9.1 on 2.6, as 2.6 support was dropped in 1.10
-# require matplotlib 1.4.3 on 2.6, as 2.6 support was dropped in 1.5
-if [[ $TRAVIS_PYTHON_VERSION == 2.6* ]]; then
-    sed -i 's/networkx.*/networkx==1.9.1/g' requirements.txt
-    sed -i 's/matplotlib.*/matplotlib==1.4.3/g' requirements.txt
-fi
-
 if [[ $MINIMUM_REQUIREMENTS == 1 ]]; then
     sed -i 's/>=/==/g' requirements.txt
 fi