fixed the flake8 errors for examples

doesn't affect that much the code, it just remove
unused modules and make it look better.

examples/alert.py

@@ -10,6 +10,7 @@ def _destroy_cb(widget, data=None):
 def __start_response_cb(widget, data=None):
     print 'Response: start download'
 
+
 w = Gtk.Window()
 w.connect("destroy", _destroy_cb)
 

examples/animator.py

@@ -25,6 +25,7 @@ def __animation_completed_cb(anim):
 def _destroy_cb(widget, data=None):
     Gtk.main_quit()
 
+
 w = Gtk.Window()
 w.connect("destroy", _destroy_cb)
 

examples/combobox.py

@@ -6,6 +6,7 @@ from sugar3.graphics.combobox import ComboBox
 def __combo_changed_cb(combo):
     print 'Combo changed to %r' % combo.get_value()
 
+
 w = Gtk.Window()
 w.connect("destroy", Gtk.main_quit)
 

examples/common.py

@@ -31,6 +31,8 @@ def set_theme():
             sugar_theme = 'sugar-100'
     settings.set_property('gtk-theme-name', sugar_theme)
     settings.set_property('gtk-icon-theme-name', 'sugar')
+
+
 set_theme()
 
 

examples/customdestroy.py

@@ -22,6 +22,7 @@ def window_destroy_cb(*kwargs):
     print "window destroy"
     Gtk.main_quit()
 
+
 window = Gtk.Window(Gtk.WindowType.TOPLEVEL)
 window.connect("destroy", window_destroy_cb)
 window.show()
@@ -30,6 +31,7 @@ window.show()
 def treeview_destroy_cb(*kwargs):
     print "treeview destroy"
 
+
 treeview = Gtk.TreeView()
 treeview.connect("destroy", treeview_destroy_cb)
 window.add(treeview)

examples/gtktreesensitive.py

@@ -40,6 +40,7 @@ class MyBox(Gtk.VBox):
 
         self.show_all()
 
+
 vbox = MyBox()
 test.pack_start(vbox, True, True, 0)
 vbox.show()

examples/iconcache.py

@@ -52,6 +52,7 @@ def _button_activated_cb(button):
         test.get_children()[i].props.icon_name = data[i][0]
         test.get_children()[i].props.xo_color = XoColor(data[i][1])
 
+
 for d in data:
     icon = Icon(icon_name=d[0],
                 icon_size=Gtk.IconSize.LARGE_TOOLBAR,

examples/iconentry.py

@@ -14,6 +14,7 @@ def __go_next_cb(entry, icon_pos, data=None):
 def __entry_activate_cb(widget, data=None):
     print 'Entry activate'
 
+
 w = Gtk.Window()
 w.connect("destroy", _destroy_cb)
 

examples/notebook.py

@@ -6,6 +6,7 @@ from sugar3.graphics.notebook import Notebook
 def _destroy_cb(widget, data=None):
     Gtk.main_quit()
 
+
 w = Gtk.Window()
 w.connect("destroy", _destroy_cb)
 

examples/radiopalette.py

@@ -21,6 +21,7 @@ def echo(button, label):
         return
     text_view.props.buffer.props.text += '\n' + label
 
+
 # RadioMenuButton
 
 palette = RadioPalette()

examples/radiotoolbutton.py

@@ -3,7 +3,6 @@ from gi.repository import Gtk
 from sugar3.graphics.radiotoolbutton import RadioToolButton
 from sugar3.graphics.radiopalette import RadioPalette, RadioMenuButton
 from sugar3.graphics.xocolor import XoColor
-from sugar3.graphics import style
 
 
 window = Gtk.Window()

examples/scrollingdetector.py

@@ -15,10 +15,12 @@ def _scroll_start_cb(event, treeview, invoker):
     print "Scroll starts"
     invoker.detach()
 
+
 def _scroll_end_cb(event, treeview, invoker):
     print "Scroll ends"
     invoker.attach_treeview(treeview)
 
+
 test = common.Test()
 test.show()
 

examples/toolbar.py

@@ -27,6 +27,8 @@ toolbar.toolbar.insert(Gtk.SeparatorToolItem(), -1)
 
 def del_cb(widget):
     toolbar.toolbar.remove(tollbarbutton_3)
+
+
 del_b = Gtk.Button('delete sub-widget #3')
 del_b.connect('clicked', del_cb)
 tollbarbutton_3 = ToolbarButton(

examples/toolbutton.py

@@ -23,6 +23,7 @@ def __clicked_cb(button):
     button.set_tooltip(str(n+1))
     print "tool button click count %d" % n
 
+
 tool_button = ToolButton(icon_name='view-radial', tooltip='0')
 tool_button.connect('clicked', __clicked_cb)
 tool_button.set_hide_tooltip_on_click(False)