Drop support for Python 2.6

This is starting to cause other packages to fail and Python
2.6 has been deprecated for half a decade at this point.

Author: acdha

.travis.yml

@@ -1,12 +1,12 @@
 language: python
 python:
  - "2.7"
- - "2.6"
  - "3.3"
  - "3.4"
  - "3.5"
  - "3.6"
  - "3.6-dev"
+ - "3.7-dev"
 
 addons:
   apt:
@@ -15,11 +15,12 @@ addons:
 
 matrix:
   allow_failures:
-    python: "3.6-dev"
+    python:
+        - "3.6-dev"
+        - "3.7-dev"
 
 install:
     - pip install --upgrade pip
-    - if [[ $TRAVIS_PYTHON_VERSION == '2.6' ]]; then pip install unittest2; fi
     - pip install coveralls coverage
 
 script: coverage run --include=bagit.py setup.py test

README.rst

@@ -16,7 +16,7 @@ project as needed or you can install globally with:
 
     pip install bagit
 
-Python v2.6+ is required.
+Python v2.7+ is required.
 
 Command Line Usage
 ------------------

bagit.py

@@ -115,9 +115,7 @@ def find_locale_dir():
     # Payload-Oxum is autogenerated
 ]
 
-# The getattr call can be replaced with direct access when we're willing to
-# break compatibility with Python 2.6:
-CHECKSUM_ALGOS = getattr(hashlib, 'algorithms_guaranteed', set(('md5', 'sha1', 'sha256', 'sha384', 'sha512')))
+CHECKSUM_ALGOS = hashlib.algorithms_guaranteed
 DEFAULT_CHECKSUMS = ['sha256', 'sha512']
 
 #: Block size used when reading files for hashing:
@@ -1394,9 +1392,6 @@ def main():
     if args.processes < 0:
         parser.error(_("The number of processes must be 0 or greater"))
 
-    if sys.version_info < (2, 7) and args.processes > 1:
-        parser.error(_('Multiple processes are not supported on Python 2.6'))
-
     if args.fast and not args.validate:
         parser.error(_('--fast is only allowed as an option for --validate!'))
 

locale/bagit-python.pot

@@ -345,9 +345,6 @@ msgstr ""
 msgid "The number of processes must be 0 or greater"
 msgstr ""
 
-msgid "Multiple processes are not supported on Python 2.6"
-msgstr ""
-
 msgid "--fast is only allowed as an option for --validate!"
 msgstr ""
 

locale/en/LC_MESSAGES/bagit-python.po

@@ -352,9 +352,6 @@ msgstr ""
 msgid "The number of processes must be 0 or greater"
 msgstr ""
 
-msgid "Multiple processes are not supported on Python 2.6"
-msgstr ""
-
 msgid "--fast is only allowed as an option for --validate!"
 msgstr ""
 

setup.py

@@ -9,8 +9,8 @@
 import sys
 from setuptools import setup
 
-if sys.version_info < (2, 6):
-    print("Python 2.6 or higher is required")
+if sys.version_info < (2, 7):
+    print("Python 2.7 or higher is required")
     sys.exit(1)
 
 description = 'Create and validate BagIt packages'
@@ -20,9 +20,6 @@
 
 tests_require = ['mock', 'coverage']
 
-if sys.version_info < (2, 7):
-    tests_require.append('unittest2')
-
 
 def get_message_catalogs():
     message_catalogs = []
@@ -65,7 +62,6 @@ def get_message_catalogs():
         'Topic :: Communications :: File Sharing',
         'Topic :: Software Development :: Libraries :: Python Modules',
         'Topic :: System :: Filesystems',
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3.1',
         'Programming Language :: Python :: 3.2',

test.py

@@ -19,9 +19,6 @@
 import bagit
 import mock
 
-if sys.version_info < (2, 7):
-    import unittest2 as unittest  # NOQA
-
 logging.basicConfig(filename='test.log', level=logging.DEBUG)
 stderr = logging.StreamHandler()
 stderr.setLevel(logging.WARNING)
@@ -633,7 +630,6 @@ def test_garbage_in_bagit_txt(self):
             bf.write(bagfile)
         self.assertRaises(bagit.BagValidationError, bagit.Bag, self.tmpdir)
 
-    @unittest.skipIf(sys.version_info < (2, 7), 'multiprocessing is unstable on Python 2.6')
     def test_make_bag_multiprocessing(self):
         bagit.make_bag(self.tmpdir, processes=2)
         self.assertTrue(os.path.isdir(j(self.tmpdir, 'data')))

tox.ini

@@ -1,7 +1,5 @@
 [tox]
-envlist = py26,py27,py33,py34,py35,py36
+envlist = py27,py33,py34,py35,py36
 
 [testenv]
 commands = python setup.py test
-deps =
-    py26: unittest2