use items/values for python2/3 compat

skimage/viewer/plugins/base.py

@@ -7,15 +7,6 @@ from ..qt.QtCore import Qt
 from ..utils import RequiredAttr, init_qtapp
 
 
-# Python2/3 compatibility
-import sys
-PY2 = sys.version_info[0] == 2
-if PY2:
-    iteritems = lambda d: d.iteritems()
-else:
-    iteritems = lambda d: d.items()
-
-
 class Plugin(QtGui.QDialog):
     """Base class for plugins that interact with an ImageViewer.
 
@@ -162,7 +153,7 @@ class Plugin(QtGui.QDialog):
             return
         arguments = [self._get_value(a) for a in self.arguments]
         kwargs = dict([(name, self._get_value(a))
-                       for name, a in iteritems(self.keyword_arguments)])
+                       for name, a in self.keyword_arguments.items()])
         filtered = self.image_filter(*arguments, **kwargs)
         self.display_filtered_image(filtered)