Switch from 2to3 to six. Close #132.

.travis.yml

@@ -3,6 +3,7 @@ language: python
 python:
   - 2.7
   - 3.4
+  - 3.5
   - 3.6
   - pypy
 

blessings/__init__.py

@@ -5,6 +5,7 @@
 import curses
 from curses import setupterm, tigetnum, tigetstr, tparm
 from fcntl import ioctl
+from six import text_type, string_types
 
 try:
     from io import UnsupportedOperation as IOUnsupportedOperation
@@ -420,7 +421,7 @@ def derivative_colors(colors):
                       'shadow', 'standout', 'subscript', 'superscript']))
 
 
-class ParametrizingString(unicode):
+class ParametrizingString(text_type):
     """A Unicode string which can be called to parametrize it as a terminal
     capability"""
 
@@ -432,7 +433,7 @@ def __new__(cls, formatting, normal=None):
             "normal" capability.
 
         """
-        new = unicode.__new__(cls, formatting)
+        new = text_type.__new__(cls, formatting)
         new._normal = normal
         return new
 
@@ -461,7 +462,7 @@ def __call__(self, *args):
         except TypeError:
             # If the first non-int (i.e. incorrect) arg was a string, suggest
             # something intelligent:
-            if len(args) == 1 and isinstance(args[0], basestring):
+            if len(args) == 1 and isinstance(args[0], string_types):
                 raise TypeError(
                     'A native or nonexistent capability template received '
                     '%r when it was expecting ints. You probably misspelled a '
@@ -472,12 +473,12 @@ def __call__(self, *args):
                 raise
 
 
-class FormattingString(unicode):
+class FormattingString(text_type):
     """A Unicode string which can be called upon a piece of text to wrap it in
     formatting"""
 
     def __new__(cls, formatting, normal):
-        new = unicode.__new__(cls, formatting)
+        new = text_type.__new__(cls, formatting)
         new._normal = normal
         return new
 
@@ -492,15 +493,15 @@ def __call__(self, text):
         return self + text + self._normal
 
 
-class NullCallableString(unicode):
+class NullCallableString(text_type):
     """A dummy callable Unicode to stand in for ``FormattingString`` and
     ``ParametrizingString``
 
     We use this when there is no tty and thus all capabilities should be blank.
 
     """
     def __new__(cls):
-        new = unicode.__new__(cls, u'')
+        new = text_type.__new__(cls, u'')
         return new
 
     def __call__(self, *args):

blessings/tests.py

@@ -9,14 +9,13 @@
 xterm-256color exists.
 
 """
-from __future__ import with_statement  # Make 2.5-compatible
 from curses import tigetstr, tparm
 from functools import partial
-from StringIO import StringIO
 import sys
 
 from nose import SkipTest
 from nose.tools import eq_
+from six import StringIO
 
 # This tests that __all__ is correct, since we use below everything that should
 # be imported:
@@ -229,22 +228,22 @@ def test_nice_formatting_errors():
     t = TestTerminal()
     try:
         t.bold_misspelled('hey')
-    except TypeError, e:
+    except TypeError as e:
         assert 'probably misspelled' in e.args[0]
 
     try:
         t.bold_misspelled(u'hey')  # unicode
-    except TypeError, e:
+    except TypeError as e:
         assert 'probably misspelled' in e.args[0]
 
     try:
         t.bold_misspelled(None)  # an arbitrary non-string
-    except TypeError, e:
+    except TypeError as e:
         assert 'probably misspelled' not in e.args[0]
 
     try:
         t.bold_misspelled('a', 'b')  # >1 string arg
-    except TypeError, e:
+    except TypeError as e:
         assert 'probably misspelled' not in e.args[0]
 
 

setup.py

@@ -10,10 +10,6 @@
 from setuptools import setup, find_packages
 
 
-extra_setup = {}
-if sys.version_info >= (3,):
-    extra_setup['use_2to3'] = True
-
 setup(
     name='blessings',
     version='1.6.1',
@@ -23,6 +19,7 @@
     author_email='erikrose@grinchcentral.com',
     license='MIT',
     packages=find_packages(exclude=['ez_setup']),
+    install_requires=['six'],
     tests_require=['nose'],
     test_suite='nose.collector',
     url='https://github.com/erikrose/blessings',
@@ -49,5 +46,4 @@
         'Topic :: Terminals'
         ],
     keywords=['terminal', 'tty', 'curses', 'ncurses', 'formatting', 'style', 'color', 'console'],
-    **extra_setup
 )

tox.ini

@@ -1,8 +1,8 @@
 [tox]
-envlist = py27, py34, py36
+envlist = py{27,34,35,36,py}
 
 [testenv]
 commands = nosetests blessings
-deps = nose
-# So Python 3 runs don't pick up incompatible, un-2to3'd source from the cwd:
-changedir = .tox
+deps =
+    nose
+    six