Merge pull request faif#308 from gyermolenko/py3only

Updating code to Python 3

Author: faif

.travis.yml

@@ -5,10 +5,6 @@ sudo: false
 
 matrix:
   include:
-    - python: "2.7"
-      env: TOXENV=ci27
-    - python: "3.6"
-      env: TOXENV=ci36
     - python: "3.7"
       env: TOXENV=ci37
     - python: "3.8"

README.md

@@ -107,10 +107,8 @@ In some cases class-level docstring with doctest would also help (see [adapter.p
 but readable OUTPUT section is much better.
 
 
-##### Python2/3 compatibility
-Try to keep it (discussion is held in [issue #208](https://github.com/faif/python-patterns/issues/208))
-- use new style classes (inherit from `object`)
-- use `from __future__ import print_function`
+##### Python2 compatibility
+To see Python 2 compatible versions of some patterns please check-out `legacy` tag.
 
 ##### Update README
 When everything else is done - update corresponding part of README.

…havioral/chain_of_responsibility__py3.py …ns/behavioral/chain_of_responsibility.pypatterns/behavioral/chain_of_responsibility__py3.py renamed to patterns/behavioral/chain_of_responsibility.py patterns/behavioral/chain_of_responsibility__py3.py renamed to patterns/behavioral/chain_of_responsibility.py

@@ -54,10 +54,7 @@ def __del__(self):
 
 
 def main():
-    try:
-        import queue
-    except ImportError:  # python 2.x compatibility
-        import Queue as queue
+    import queue
 
     def test_object(queue):
         pool = ObjectPool(queue, True)