code formatting fixes

skimage/viewer/widgets/core.py

@@ -254,6 +254,7 @@ class ComboBox(BaseWidget):
     def index(self, i):
         self._combo_box.setCurrentIndex(i)
 
+
 class CheckBox(BaseWidget):
     """CheckBox widget
 
@@ -265,17 +266,18 @@ class CheckBox(BaseWidget):
         replaced with underscores). In addition, this name is displayed as the
         name of the CheckBox.
     value: {False, True}
-        Initial state of the CheckBox.  
+        Initial state of the CheckBox.
     alignment: {'center','left','right'}
-        Checkbox alignment  
+        Checkbox alignment
     ptype : {'arg' | 'kwarg' | 'plugin'}
-        Parameter type.
+        Parameter type
     callback : function
         Callback function called in response to CheckBox changes. This function
         is typically set when the widget is added to a plugin.
     """
 
-    def __init__(self, name, value=False, alignment='center', ptype='kwarg', callback=None):
+    def __init__(self, name, value=False, alignment='center', ptype='kwarg', 
+                 callback=None):
         super(CheckBox, self).__init__(name, ptype, callback)
 
         self._check_box = QtGui.QCheckBox()
@@ -298,13 +300,10 @@ class CheckBox(BaseWidget):
 
     @property
     def val(self):
-        #return self._check_box.checkState()
         return self._check_box.isChecked()
 
-
     @val.setter
     def val(self, i):
-        #self._check_box.setCheckState(i)  # setCheckState has 3 states: 
-                                           # 0=unchecked, 1=partial, 2=checked
         self._check_box.setChecked(i)   # setChecked has only two states:
-                                        # 0 = unchecked,  2 = checked
+                                        # 0 = unchecked,  2 = checked
+                                        

viewer_examples/plugins/tv_denoise.py

@@ -4,7 +4,8 @@ from skimage.util import img_as_float
 from numpy import random, clip
 
 from skimage.viewer import ImageViewer
-from skimage.viewer.widgets import Slider, CheckBox, OKCancelButtons, SaveButtons
+from skimage.viewer.widgets import (Slider, CheckBox, OKCancelButtons, 
+									SaveButtons)
 from skimage.viewer.plugins.base import Plugin
 
 
@@ -12,13 +13,13 @@ image = img_as_float(data.chelsea())
 sigma = 30/255.
 
 image = image + random.normal(loc=0, scale=sigma, size=image.shape)
-image = clip(image,0,1)
+image = clip(image, 0, 1)
 viewer = ImageViewer(image)
 
 plugin = Plugin(image_filter=denoise_tv_chambolle)
 plugin += Slider('weight', 0.01, 5, value=0.3, value_type='float')
 plugin += Slider('n_iter_max', 1, 100, value=20, value_type='int')
-plugin += CheckBox('multichannel',value=True)
+plugin += CheckBox('multichannel', value=True)
 plugin += SaveButtons()
 plugin += OKCancelButtons()