Merge pull request faif#309 from gyermolenko/py3only2

Remove py2 compatibility-related stuff

Author: faif

patterns/behavioral/catalog.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 
 """
 A class that uses different static function depending of a parameter passed in
@@ -9,7 +8,7 @@
 __author__ = "Ibrahim Diop <ibrahim@sikilabs.com>"
 
 
-class Catalog(object):
+class Catalog:
     """catalog of multiple static methods that are executed depending on an init
 
     parameter
@@ -45,7 +44,7 @@ def main_method(self):
 
 
 # Alternative implementation for different levels of methods
-class CatalogInstance(object):
+class CatalogInstance:
 
     """catalog of multiple methods that are executed depending on an init
 
@@ -77,7 +76,7 @@ def main_method(self):
         self._instance_method_choices[self.param].__get__(self)()
 
 
-class CatalogClass(object):
+class CatalogClass:
 
     """catalog of multiple class methods that are executed depending on an init
 
@@ -112,7 +111,7 @@ def main_method(self):
         self._class_method_choices[self.param].__get__(None, self.__class__)()
 
 
-class CatalogStatic(object):
+class CatalogStatic:
 
     """catalog of multiple static methods that are executed depending on an init
 

patterns/behavioral/chain_of_responsibility.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 
 """
 *What is this pattern about?

patterns/behavioral/chaining_method.py

@@ -1,10 +1,7 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 
-from __future__ import print_function
 
-
-class Person(object):
+class Person:
     def __init__(self, name, action):
         self.name = name
         self.action = action
@@ -14,7 +11,7 @@ def do_action(self):
         return self.action
 
 
-class Action(object):
+class Action:
     def __init__(self, name):
         self.name = name
 

patterns/behavioral/command.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 
 """
 *TL;DR
@@ -10,11 +9,10 @@
  https://docs.djangoproject.com/en/2.1/ref/request-response/#httprequest-objects
 """
 
-from __future__ import print_function
 import os
 
 
-class MoveFileCommand(object):
+class MoveFileCommand:
     def __init__(self, src, dest):
         self.src = src
         self.dest = dest
@@ -26,7 +24,7 @@ def undo(self):
         self.rename(self.dest, self.src)
 
     def rename(self, src, dest):
-        print(u"renaming %s to %s" % (src, dest))
+        print("renaming {} to {}".format(src, dest))
         os.rename(src, dest)
 
 

patterns/behavioral/iterator.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 
 """
 http://ginstrom.com/scribbles/2007/10/08/design-patterns-python-style/
@@ -9,8 +8,6 @@
 Traverses a container and accesses the container's elements.
 """
 
-from __future__ import print_function
-
 
 def count_to(count):
     """Counts by word numbers, up to a maximum of five"""

patterns/behavioral/mediator.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 
 """
 https://www.djangospin.com/design-patterns-python/mediator/
@@ -12,14 +11,14 @@
 """
 
 
-class ChatRoom(object):
+class ChatRoom:
     """Mediator class"""
 
     def display_message(self, user, message):
         print("[{} says]: {}".format(user, message))
 
 
-class User(object):
+class User:
     """A class whose instances want to interact with each other"""
 
     def __init__(self, name):

patterns/behavioral/memento.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 
 """
 http://code.activestate.com/recipes/413838-memento-closure/
@@ -22,7 +21,7 @@ def restore():
     return restore
 
 
-class Transaction(object):
+class Transaction:
     """A transaction guard.
 
     This is, in fact, just syntactic sugar around a memento closure.
@@ -44,7 +43,7 @@ def rollback(self):
             a_state()
 
 
-class Transactional(object):
+class Transactional:
     """Adds transactional semantics to methods. Methods decorated  with
 
     @Transactional will rollback to entry-state upon exceptions.
@@ -65,7 +64,7 @@ def transaction(*args, **kwargs):
         return transaction
 
 
-class NumObj(object):
+class NumObj:
     def __init__(self, value):
         self.value = value
 

patterns/behavioral/observer.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 
 """
 http://code.activestate.com/recipes/131499-observer-pattern/
@@ -12,10 +11,8 @@
 Flask Signals: http://flask.pocoo.org/docs/1.0/signals/
 """
 
-from __future__ import print_function
 
-
-class Subject(object):
+class Subject:
     def __init__(self):
         self._observers = []
 
@@ -35,7 +32,6 @@ def notify(self, modifier=None):
                 observer.update(self)
 
 
-# Example usage
 class Data(Subject):
     def __init__(self, name=''):
         Subject.__init__(self)
@@ -54,15 +50,14 @@ def data(self, value):
 
 class HexViewer:
     def update(self, subject):
-        print(u'HexViewer: Subject %s has data 0x%x' % (subject.name, subject.data))
+        print('HexViewer: Subject {} has data 0x{:x}'.format(subject.name, subject.data))
 
 
 class DecimalViewer:
     def update(self, subject):
-        print(u'DecimalViewer: Subject %s has data %d' % (subject.name, subject.data))
+        print('DecimalViewer: Subject %s has data %d' % (subject.name, subject.data))
 
 
-# Example usage...
 def main():
     """
     >>> data1 = Data('Data 1')

patterns/behavioral/publish_subscribe.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
+
 """
 Reference:
 http://www.slideshare.net/ishraqabd/publish-subscribe-model-overview-13368808

patterns/behavioral/registry.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 
 
 class RegistryHolder(type):