diff --git a/examples/core/appconfig.py b/examples/core/appconfig.py
index a6b41c1..c2e4d26 100644
--- a/examples/core/appconfig.py
+++ b/examples/core/appconfig.py
@@ -30,8 +30,6 @@ When the config attribute of an Application is updated, it will fire all of
 the trait's events for all of the config=True attributes.
 """
 
-import sys
-
 from IPython.config.configurable import Configurable
 from IPython.config.application import Application
 from IPython.utils.traitlets import (
@@ -87,8 +85,8 @@ class MyApp(Application):
         self.init_bar()
     
     def start(self):
-        print "app.config:"
-        print self.config
+        print("app.config:")
+        print(self.config)
 
 
 def main():
diff --git a/examples/core/ipython-get-history.py b/examples/core/ipython-get-history.py
index d6d51ec..3768aea 100755
--- a/examples/core/ipython-get-history.py
+++ b/examples/core/ipython-get-history.py
@@ -17,7 +17,6 @@ to build much more flexible and powerful tools to browse and pull from the
 history database.
 """
 import sys
-import codecs
 
 from IPython.core.history import HistoryAccessor
 
@@ -34,5 +33,5 @@ dest.write("# coding: utf-8\n")
 hist = HistoryAccessor()
 
 for session, lineno, cell in hist.get_range(session=session_number, raw=raw):
-    # To use this in Python 3, remove the .encode() here:
-    dest.write(cell.encode('utf-8') + '\n')
+    cell = cell.encode('utf-8')  # This line is only needed on Python 2.
+    dest.write(cell + '\n')
diff --git a/examples/inprocess/embedded_qtconsole.py b/examples/inprocess/embedded_qtconsole.py
index 5fe6a1a..3fc6629 100644
--- a/examples/inprocess/embedded_qtconsole.py
+++ b/examples/inprocess/embedded_qtconsole.py
@@ -1,3 +1,4 @@
+from __future__ import print_function
 import os
 
 from IPython.qt.console.rich_ipython_widget import RichIPythonWidget
@@ -6,7 +7,7 @@ from IPython.lib import guisupport
 
 
 def print_process_id():
-    print 'Process ID is:', os.getpid()
+    print('Process ID is:', os.getpid())
 
 
 def main():
diff --git a/examples/inprocess/embedded_terminal.py b/examples/inprocess/embedded_terminal.py
index e42105b..a295c0a 100644
--- a/examples/inprocess/embedded_terminal.py
+++ b/examples/inprocess/embedded_terminal.py
@@ -1,3 +1,4 @@
+from __future__ import print_function
 import os
 
 from IPython.kernel.inprocess import InProcessKernelManager
@@ -5,7 +6,7 @@ from IPython.terminal.console.interactiveshell import ZMQTerminalInteractiveShel
 
 
 def print_process_id():
-    print 'Process ID is:', os.getpid()
+    print('Process ID is:', os.getpid())
 
 
 def main():
diff --git a/examples/lib/gui-qt.py b/examples/lib/gui-qt.py
index 13e4d27..abb6fb8 100755
--- a/examples/lib/gui-qt.py
+++ b/examples/lib/gui-qt.py
@@ -10,7 +10,6 @@ In [6]: %run gui-qt.py
 Ref: Modified from http://zetcode.com/tutorials/pyqt4/firstprograms/
 """
 
-import sys
 from PyQt4 import QtGui, QtCore
 
 class SimpleWindow(QtGui.QWidget):
diff --git a/examples/lib/gui-tk.py b/examples/lib/gui-tk.py
index beb8677..681e003 100755
--- a/examples/lib/gui-tk.py
+++ b/examples/lib/gui-tk.py
@@ -8,7 +8,10 @@ In [5]: %gui tk
 In [6]: %run gui-tk.py
 """
 
-from Tkinter import *
+try:
+    from tkinter import *  # Python 3
+except ImportError:
+    from Tkinter import *  # Python 2
 
 class MyApp:
 
diff --git a/examples/lib/internal_ipkernel.py b/examples/lib/internal_ipkernel.py
index 862bae2..d3ee57c 100644
--- a/examples/lib/internal_ipkernel.py
+++ b/examples/lib/internal_ipkernel.py
@@ -2,7 +2,6 @@
 # Imports
 #-----------------------------------------------------------------------------
 
-import subprocess
 import sys
 
 from IPython.lib.kernel import connect_qtconsole
@@ -42,7 +41,7 @@ class InternalIPKernel(object):
 
     def print_namespace(self, evt=None):
         print("\n***Variables in User namespace***")
-        for k, v in self.namespace.iteritems():
+        for k, v in self.namespace.items():
             if k not in self._init_keys and not k.startswith('_'):
                 print('%s -> %r' % (k, v))
         sys.stdout.flush()