More PEP8 changes

IPython/html/widgets/widget.py

@@ -31,8 +31,9 b' class Widget(LoggingConfigurable):'
     widgets = {}
 
     def on_widget_constructed(callback):
-        """Class method, registers a callback to be called when a widget is
-        constructed.  The callback must have the following signature:
+        """Registers a callback to be called when a widget is constructed.  
+
+        The callback must have the following signature:
         callback(widget)"""
         Widget.widget_construction_callback = callback
 
@@ -41,8 +42,6 b' class Widget(LoggingConfigurable):'
         if Widget.widget_construction_callback is not None and callable(Widget.widget_construction_callback):
             Widget.widget_construction_callback(widget)
 
-    
-
     # Public declarations (Instance level)
     model_name = Unicode('WidgetModel', help="""Name of the backbone model 
         registered in the front-end to create and sync this widget with.""")
@@ -80,8 +79,7 b' class Widget(LoggingConfigurable):'
     _comm = Instance('IPython.kernel.comm.Comm')
     
     def __init__(self, **kwargs):
-        """Public constructor
-        """
+        """Public constructor"""
         self.closed = False
         self._property_lock = (None, None)
         self._display_callbacks = []
@@ -97,21 +95,21 b' class Widget(LoggingConfigurable):'
         self.close()
 
     def close(self):
-        """Close method.  Closes the widget which closes the underlying comm.
+        """Close method.  
+
+        Closes the widget which closes the underlying comm.
         When the comm is closed, all of the widget views are automatically
         removed from the front-end."""
         if not self.closed:
             self._comm.close() 
             self._close()
 
-
     def _close(self):
         """Unsafe close"""
         del Widget.widgets[self.model_id]
         self._comm = None
         self.closed = True
 
-
     @property
     def comm(self):
         if self._comm is None:
@@ -147,7 +145,6 b' class Widget(LoggingConfigurable):'
             if 'custom_content' in data:
                 self._handle_custom_msg(data['custom_content'])
 
-
     def _handle_receive_state(self, sync_data):
         """Called when a state is received from the front-end."""
         for name in self.keys:
@@ -156,13 +153,11 b' class Widget(LoggingConfigurable):'
                 with self.property_lock(name, value):
                     setattr(self, name, value)
 
-
     def _handle_custom_msg(self, content):
         """Called when a custom msg is received."""
         for handler in self._msg_callbacks:
             handler(self, content)
 
-
     def _handle_property_changed(self, name, old, new):
         """Called when a property has been changed."""
         # Make sure this isn't information that the front-end just sent us.
@@ -198,10 +193,8 b' class Widget(LoggingConfigurable):'
         keys = self.keys if key is None else [key]
         return {k: self._pack_widgets(getattr(self, k)) for k in keys} 
 
-
     def _pack_widgets(self, values):
-        """This function recursively converts all widget instances to model id
-        strings.
+        """Recursively converts all widget instances to model id strings.
 
         Children widgets will be stored and transmitted to the front-end by 
         their model ids."""
@@ -220,10 +213,8 b' class Widget(LoggingConfigurable):'
         else:
             return values
 
-
     def _unpack_widgets(self, values):
-        """This function recursively converts all model id strings to widget 
-        instances.
+        """Recursively converts all model id strings to widget instances.
 
         Children widgets will be stored and transmitted to the front-end by 
         their model ids."""
@@ -245,7 +236,6 b' class Widget(LoggingConfigurable):'
         else:
             return values
 
-
     def send(self, content):
         """Sends a custom msg to the widget model in the front-end.
 
@@ -256,10 +246,8 b' class Widget(LoggingConfigurable):'
         """
         self._send({"method": "custom", "custom_content": content})
 
-
     def on_msg(self, callback, remove=False):
-        """Register or unregister a callback for when a custom msg is recieved 
-        from the front-end.
+        """(Un)Register a custom msg recieve callback.
 
         Parameters
         ----------
@@ -291,10 +279,8 b' class Widget(LoggingConfigurable):'
             else:
                 raise Exception('Callback must be callable.')
 
-
     def on_displayed(self, callback, remove=False):
-        """Register or unregister a callback to be called when the widget has 
-        been displayed.
+        """(Un)Register a widget displayed callback.
 
         Parameters
         ----------
@@ -312,20 +298,16 b' class Widget(LoggingConfigurable):'
             else:
                 raise Exception('Callback must be callable.')
 
-
     # Support methods
     def _ipython_display_(self, **kwargs):
-        """Function that is called when `IPython.display.display` is called on
-        the widget."""
-            
+        """Called when `IPython.display.display` is called on the widget."""
         # Show view.  By sending a display message, the comm is opened and the
         # initial state is sent.
         self._send({"method": "display"})
         self._handle_displayed(**kwargs)
 
-
     def _send(self, msg):
-        """Sends a message to the model in the front-end"""
+        """Sends a message to the model in the front-end."""
         self.comm.send(msg)
 
 
@@ -408,9 +390,8 b' class DOMWidget(Widget):'
         else:
             raise Exception('set_css only accepts 1-3 arguments')
 
-
     def add_class(self, class_names, selector=""):
-        """Add class[es] to a DOM element
+        """Add class[es] to a DOM element.
 
         Parameters
         ----------
@@ -428,9 +409,8 b' class DOMWidget(Widget):'
             "class_list": class_list,
             "selector": selector})
 
-
     def remove_class(self, class_names, selector=""):
-        """Remove class[es] from a DOM element
+        """Remove class[es] from a DOM element.
 
         Parameters
         ----------

IPython/html/widgets/widget_bool.py

@@ -27,6 +27,7 b' class CheckBoxWidget(DOMWidget):'
     description = Unicode('', help="Description of the boolean (label).", sync=True) 
     disabled = Bool(False, help="Enable or disable user changes.", sync=True)
 
+
 class ToggleButtonWidget(CheckBoxWidget):
     view_name = Unicode('ToggleButtonView', sync=True)
     
  No newline at end of file

IPython/html/widgets/widget_button.py

@@ -30,17 +30,17 b' class ButtonWidget(DOMWidget):'
     description = Unicode('', help="Description of the button (label).", sync=True)
     disabled = Bool(False, help="Enable or disable user changes.", sync=True)
     
-
     def __init__(self, **kwargs):
+        """Constructor"""
         super(ButtonWidget, self).__init__(**kwargs)
         
         self._click_handlers = []
         self.on_msg(self._handle_button_msg)
 
-
     def on_click(self, callback, remove=False):
-        """Register a callback to execute when the button is clicked.  The
-        callback can either accept no parameters or one sender parameter:
+        """Register a callback to execute when the button is clicked.  
+
+        The callback can either accept no parameters or one sender parameter:
         - callback()
         - callback(sender)
         If the callback has a sender parameter, the ButtonWidget instance that
@@ -55,9 +55,8 b' class ButtonWidget(DOMWidget):'
         elif not callback in self._click_handlers:
             self._click_handlers.append(callback)
 
-
     def _handle_button_msg(self, content):
-        """Handle a msg from the front-end
+        """Handle a msg from the front-end.
 
         Parameters
         ----------
@@ -66,11 +65,10 b' class ButtonWidget(DOMWidget):'
         if 'event' in content and content['event'] == 'click':
             self._handle_click()
 
-
     def _handle_click(self):
-        """Handles when the button has been clicked.  Fires on_click
-        callbacks when appropriate."""
-        
+        """Handles when the button has been clicked.
+
+        Fires on_click callbacks when appropriate."""
         for handler in self._click_handlers:
             if callable(handler):
                 argspec = inspect.getargspec(handler)
@@ -88,4 +86,3 b' class ButtonWidget(DOMWidget):'
                 else:
                     raise TypeError('ButtonWidget click callback must ' \
                         'accept 0 or 1 arguments.')
-        

IPython/html/widgets/widget_container.py

@@ -29,5 +29,6 b' class ContainerWidget(DOMWidget):'
     description = Unicode(sync=True)
     button_text = Unicode(sync=True)
 
+
 class ModalWidget(ContainerWidget):
     view_name = Unicode('ModalView', sync=True)

IPython/html/widgets/widget_float_range.py

@@ -34,7 +34,7 b' class BoundedFloatTextWidget(DOMWidget):'
         self.on_trait_change(self._validate, ['value', 'min', 'max'])
 
     def _validate(self, name, old, new):
-        """Validate value, max, min"""
+        """Validate value, max, min."""
         if self.min > new or new > self.max:
             self.value = min(max(new, self.min), self.max)
 

IPython/html/widgets/widget_int_range.py

@@ -36,7 +36,7 b' class BoundedIntTextWidget(DOMWidget):'
         self.on_trait_change(self._validate, ['value', 'min', 'max'])
 
     def _validate(self, name, old, new):
-        """Validate value, max, min"""
+        """Validate value, max, min."""
         if self.min > new or new > self.max:
             self.value = min(max(new, self.min), self.max)
 

IPython/html/widgets/widget_selectioncontainer.py

@@ -31,7 +31,7 b' class AccordionWidget(DOMWidget):'
 
     # Public methods
     def set_title(self, index, title):
-        """Sets the title of a container page
+        """Sets the title of a container page.
 
         Parameters
         ----------
@@ -42,9 +42,8 b' class AccordionWidget(DOMWidget):'
         self._titles[index] = title
         self.send_state('_titles')
 
-
     def get_title(self, index):
-        """Gets the title of a container pages
+        """Gets the title of a container pages.
 
         Parameters
         ----------

IPython/html/widgets/widget_string.py

@@ -51,7 +51,7 b' class TextBoxWidget(HTMLWidget):'
         self.on_msg(self._handle_string_msg)
 
     def _handle_string_msg(self, content):
-        """Handle a msg from the front-end
+        """Handle a msg from the front-end.
 
         Parameters
         ----------
@@ -62,8 +62,9 b' class TextBoxWidget(HTMLWidget):'
                 handler(self)
 
     def on_submit(self, callback, remove=False):
-        """Register a callback to handle text submission (triggered when the 
-        user clicks enter).
+        """(Un)Register a callback to handle text submission.
+
+        Triggered when the user clicks enter.
 
         Parameters
         callback: Method handle