Make print syntax in GUI integration examples Python 3 compatible.

docs/examples/lib/example-demo.py

@@ -5,10 +5,11 b' it on-screen, syntax-highlighted in one shot. If you add a little simple'
 markup, you can stop at specified intervals and return to the ipython prompt,
 resuming execution later.
 """
+from __future__ import print_function
 
-print 'Hello, welcome to an interactive IPython demo.'
-print 'Executing this block should require confirmation before proceeding,'
-print 'unless auto_all has been set to true in the demo object'
+print('Hello, welcome to an interactive IPython demo.')
+print('Executing this block should require confirmation before proceeding,')
+print('unless auto_all has been set to true in the demo object')
 
 # The mark below defines a block boundary, which is a point where IPython will
 # stop execution and return to the interactive prompt.
@@ -23,18 +24,18 b' y = 2'
 # the mark below makes this block as silent
 # <demo> silent
 
-print 'This is a silent block, which gets executed but not printed.'
+print('This is a silent block, which gets executed but not printed.')
 
 # <demo> --- stop ---
 # <demo> auto
-print 'This is an automatic block.'
-print 'It is executed without asking for confirmation, but printed.'
+print('This is an automatic block.')
+print('It is executed without asking for confirmation, but printed.')
 z = x+y
 
-print 'z=',x
+print('z=',x)
 
 # <demo> --- stop ---
 # This is just another normal block.
-print 'z is now:', z
+print('z is now:', z)
 
-print 'bye!'
+print('bye!')

docs/examples/lib/gui-gtk.py

@@ -14,7 +14,7 b' import gtk'
 
 
 def hello_world(wigdet, data=None):
-    print "Hello World"
+    print("Hello World")
 
 def delete_event(widget, event, data=None):
     return False

docs/examples/lib/gui-tk.py

@@ -20,7 +20,7 b' class MyApp:'
         self.button.pack(side=LEFT)
 
     def hello_world(self):
-        print "Hello World!"
+        print("Hello World!")
 
 root = Tk()
 

docs/examples/lib/gui-wx.py

@@ -69,12 +69,12 b' class MyFrame(wx.Frame):'
 
     def OnTimeToClose(self, evt):
         """Event handler for the button click."""
-        print "See ya later!"
+        print("See ya later!")
         self.Close()
 
     def OnFunButton(self, evt):
         """Event handler for the button click."""
-        print "Having fun yet?"
+        print("Having fun yet?")
 
 
 class MyApp(wx.App):
@@ -82,7 +82,7 b' class MyApp(wx.App):'
         frame = MyFrame(None, "Simple wxPython App")
         self.SetTopWindow(frame)
 
-        print "Print statements go to this stdout window by default."
+        print("Print statements go to this stdout window by default.")
 
         frame.Show(True)
         return True
@@ -96,7 +96,7 b" if __name__ == '__main__':"
     else:
         frame = MyFrame(None, "Simple wxPython App")
         app.SetTopWindow(frame)
-        print "Print statements go to this stdout window by default."
+        print("Print statements go to this stdout window by default.")
         frame.Show(True)
 
     try:

docs/examples/lib/internal_ipkernel.py

@@ -41,10 +41,10 b' class InternalIPKernel(object):'
         #self.namespace['ipkernel'] = self.ipkernel  # dbg
 
     def print_namespace(self, evt=None):
-        print "\n***Variables in User namespace***"
+        print("\n***Variables in User namespace***")
         for k, v in self.namespace.iteritems():
             if k not in self._init_keys and not k.startswith('_'):
-                print '%s -> %r' % (k, v)
+                print('%s -> %r' % (k, v))
         sys.stdout.flush()
 
     def new_qt_console(self, evt=None):

docs/examples/lib/ipkernel_wxapp.py

@@ -90,7 +90,7 b' class MyFrame(wx.Frame, InternalIPKernel):'
 
     def OnTimeToClose(self, evt):
         """Event handler for the button click."""
-        print "See ya later!"
+        print("See ya later!")
         sys.stdout.flush()
         self.cleanup_consoles(evt)
         self.Close()