diff --git a/IPython/core/debugger.py b/IPython/core/debugger.py
index 9472ec3..587c2c7 100644
--- a/IPython/core/debugger.py
+++ b/IPython/core/debugger.py
@@ -146,7 +146,7 @@ class Tracer(object):
         # at least raise that limit to 80 chars, which should be enough for
         # most interactive uses.
         try:
-            from repr import aRepr
+            from reprlib import aRepr
             aRepr.maxstring = 80
         except:
             # This is only a user-facing convenience, so any error we encounter
@@ -331,7 +331,7 @@ class Pdb(OldPdb):
         # vds: <<
 
     def format_stack_entry(self, frame_lineno, lprefix=': ', context = 3):
-        import repr
+        import reprlib
 
         ret = []
 
@@ -349,7 +349,7 @@ class Pdb(OldPdb):
         if '__return__' in frame.f_locals:
             rv = frame.f_locals['__return__']
             #return_value += '->'
-            return_value += repr.repr(rv) + '\n'
+            return_value += reprlib.repr(rv) + '\n'
         ret.append(return_value)
 
         #s = filename + '(' + `lineno` + ')'
@@ -364,7 +364,7 @@ class Pdb(OldPdb):
         call = ''
         if func != '?':
             if '__args__' in frame.f_locals:
-                args = repr.repr(frame.f_locals['__args__'])
+                args = reprlib.repr(frame.f_locals['__args__'])
             else:
                 args = '()'
             call = tpl_call % (func, args)
diff --git a/IPython/core/extensions.py b/IPython/core/extensions.py
index ff4da75..b14851c 100644
--- a/IPython/core/extensions.py
+++ b/IPython/core/extensions.py
@@ -170,7 +170,10 @@ class ExtensionManager(Configurable):
             copy = copyfile
         else:
             from urllib import urlretrieve  # Deferred imports
-            from urlparse import urlparse
+            try:
+                from urllib.parse import urlparse  # Py3
+            except ImportError:
+                from urlparse import urlparse
             src_filename = urlparse(url).path.split('/')[-1]
             copy = urlretrieve
             
diff --git a/IPython/core/formatters.py b/IPython/core/formatters.py
index 6a2b43d..49edc10 100644
--- a/IPython/core/formatters.py
+++ b/IPython/core/formatters.py
@@ -28,7 +28,7 @@ import abc
 import sys
 import warnings
 # We must use StringIO, as cStringIO doesn't handle unicode properly.
-from StringIO import StringIO
+from io import StringIO
 
 # Our own imports
 from IPython.config.configurable import Configurable
diff --git a/IPython/core/inputtransformer.py b/IPython/core/inputtransformer.py
index 7582d65..56fbb5d 100644
--- a/IPython/core/inputtransformer.py
+++ b/IPython/core/inputtransformer.py
@@ -1,7 +1,7 @@
 import abc
 import functools
 import re
-from StringIO import StringIO
+from io import StringIO
 
 from IPython.core.splitinput import LineInfo
 from IPython.utils import tokenize2
diff --git a/IPython/core/magics/execution.py b/IPython/core/magics/execution.py
index e8ba0b6..bd6b048 100644
--- a/IPython/core/magics/execution.py
+++ b/IPython/core/magics/execution.py
@@ -20,7 +20,7 @@ import bdb
 import os
 import sys
 import time
-from StringIO import StringIO
+from io import StringIO
 
 # cProfile was added in Python2.5
 try:
diff --git a/IPython/core/tests/test_debugger.py b/IPython/core/tests/test_debugger.py
index 4f69112..2d36a22 100644
--- a/IPython/core/tests/test_debugger.py
+++ b/IPython/core/tests/test_debugger.py
@@ -58,7 +58,7 @@ class PdbTestInput(object):
 #-----------------------------------------------------------------------------
 
 def test_longer_repr():
-    from repr import repr as trepr
+    from reprlib import repr as trepr
     
     a = '1234567890'* 7
     ar = "'1234567890123456789012345678901234567890123456789012345678901234567890'"
diff --git a/IPython/core/tests/test_interactiveshell.py b/IPython/core/tests/test_interactiveshell.py
index 5446e1a..3b7acfd 100644
--- a/IPython/core/tests/test_interactiveshell.py
+++ b/IPython/core/tests/test_interactiveshell.py
@@ -28,7 +28,7 @@ import sys
 import tempfile
 import unittest
 from os.path import join
-from StringIO import StringIO
+from io import StringIO
 
 # third-party
 import nose.tools as nt
@@ -155,7 +155,7 @@ class InteractiveShellTestCase(unittest.TestCase):
                      "        list.__init__(self,x)"))
         ip.run_cell("w=Mylist([1,2,3])")
         
-        from cPickle import dumps
+        from pickle import dumps
         
         # We need to swap in our main module - this is only necessary
         # inside the test framework, because IPython puts the interactive module
diff --git a/IPython/core/tests/test_magic.py b/IPython/core/tests/test_magic.py
index c00fec1..ae0cf0e 100644
--- a/IPython/core/tests/test_magic.py
+++ b/IPython/core/tests/test_magic.py
@@ -12,7 +12,7 @@ from __future__ import absolute_import
 import io
 import os
 import sys
-from StringIO import StringIO
+from io import StringIO
 from unittest import TestCase
 
 try:
diff --git a/IPython/core/tests/test_magic_terminal.py b/IPython/core/tests/test_magic_terminal.py
index 963f04e..464324d 100644
--- a/IPython/core/tests/test_magic_terminal.py
+++ b/IPython/core/tests/test_magic_terminal.py
@@ -9,7 +9,7 @@ from __future__ import absolute_import
 #-----------------------------------------------------------------------------
 
 import sys
-from StringIO import StringIO
+from io import StringIO
 from unittest import TestCase
 
 import nose.tools as nt
diff --git a/IPython/extensions/tests/test_autoreload.py b/IPython/extensions/tests/test_autoreload.py
index 5f71559..aac6ee9 100644
--- a/IPython/extensions/tests/test_autoreload.py
+++ b/IPython/extensions/tests/test_autoreload.py
@@ -18,7 +18,7 @@ import tempfile
 import shutil
 import random
 import time
-from StringIO import StringIO
+from io import StringIO
 
 import nose.tools as nt
 import IPython.testing.tools as tt
diff --git a/IPython/extensions/tests/test_rmagic.py b/IPython/extensions/tests/test_rmagic.py
index a93b6a7..55817b2 100644
--- a/IPython/extensions/tests/test_rmagic.py
+++ b/IPython/extensions/tests/test_rmagic.py
@@ -1,4 +1,4 @@
-from StringIO import StringIO
+from io import StringIO
 
 import numpy as np
 from IPython.testing.decorators import skip_without
diff --git a/IPython/html/base/zmqhandlers.py b/IPython/html/base/zmqhandlers.py
index a552ba9..0d4c95a 100644
--- a/IPython/html/base/zmqhandlers.py
+++ b/IPython/html/base/zmqhandlers.py
@@ -16,7 +16,10 @@ Authors:
 # Imports
 #-----------------------------------------------------------------------------
 
-import Cookie
+try:
+    from http.cookies import SimpleCookie  # Py 3
+except ImportError:
+    from Cookie import SimpleCookie  # Py 2
 import logging
 from tornado import web
 from tornado import websocket
@@ -102,7 +105,7 @@ class AuthenticatedZMQStreamHandler(ZMQStreamHandler, IPythonHandler):
             logging.error("First ws message didn't have the form 'identity:[cookie]' - %r", msg)
         
         try:
-            self.request._cookies = Cookie.SimpleCookie(msg)
+            self.request._cookies = SimpleCookie(msg)
         except:
             self.log.warn("couldn't parse cookie string: %s",msg, exc_info=True)
 
diff --git a/IPython/kernel/blocking/channels.py b/IPython/kernel/blocking/channels.py
index 6eaceda..e525019 100644
--- a/IPython/kernel/blocking/channels.py
+++ b/IPython/kernel/blocking/channels.py
@@ -13,7 +13,10 @@ Useful for test suites and blocking terminal interfaces.
 # Imports
 #-----------------------------------------------------------------------------
 
-import Queue
+try:
+    from queue import Queue, Empty  # Py 3
+except ImportError:
+    from Queue import Queue, Empty  # Py 2
 
 from IPython.kernel.channels import IOPubChannel, HBChannel, \
     ShellChannel, StdInChannel
@@ -27,7 +30,7 @@ class BlockingChannelMixin(object):
 
     def __init__(self, *args, **kwds):
         super(BlockingChannelMixin, self).__init__(*args, **kwds)
-        self._in_queue = Queue.Queue()
+        self._in_queue = Queue()
 
     def call_handlers(self, msg):
         self._in_queue.put(msg)
@@ -46,7 +49,7 @@ class BlockingChannelMixin(object):
         while True:
             try:
                 msgs.append(self.get_msg(block=False))
-            except Queue.Empty:
+            except Empty:
                 break
         return msgs
 
diff --git a/IPython/kernel/inprocess/socket.py b/IPython/kernel/inprocess/socket.py
index 464b327..6196829 100644
--- a/IPython/kernel/inprocess/socket.py
+++ b/IPython/kernel/inprocess/socket.py
@@ -13,7 +13,10 @@
 
 # Standard library imports.
 import abc
-import Queue
+try:
+    from queue import Queue  # Py 3
+except ImportError:
+    from Queue import Queue  # Py 2
 
 # System library imports.
 import zmq
@@ -45,7 +48,7 @@ SocketABC.register(zmq.Socket)
 class DummySocket(HasTraits):
     """ A dummy socket implementing (part of) the zmq.Socket interface. """
     
-    queue = Instance(Queue.Queue, ())
+    queue = Instance(Queue, ())
     message_sent = Int(0) # Should be an Event
 
     #-------------------------------------------------------------------------
diff --git a/IPython/kernel/inprocess/tests/test_kernel.py b/IPython/kernel/inprocess/tests/test_kernel.py
index 091886a..cdcdbf9 100644
--- a/IPython/kernel/inprocess/tests/test_kernel.py
+++ b/IPython/kernel/inprocess/tests/test_kernel.py
@@ -11,7 +11,7 @@
 from __future__ import print_function
 
 # Standard library imports
-from StringIO import StringIO
+from io import StringIO
 import sys
 import unittest
 
diff --git a/IPython/kernel/tests/test_message_spec.py b/IPython/kernel/tests/test_message_spec.py
index 6a0503a..9cf6325 100644
--- a/IPython/kernel/tests/test_message_spec.py
+++ b/IPython/kernel/tests/test_message_spec.py
@@ -9,7 +9,10 @@
 
 import re
 from subprocess import PIPE
-from Queue import Empty
+try:
+    from queue import Empty  # Py 3
+except ImportError:
+    from Queue import Empty  # Py 2
 
 import nose.tools as nt
 
diff --git a/IPython/kernel/tests/utils.py b/IPython/kernel/tests/utils.py
index affda47..1d0b9ab 100644
--- a/IPython/kernel/tests/utils.py
+++ b/IPython/kernel/tests/utils.py
@@ -15,7 +15,10 @@ import atexit
 
 from contextlib import contextmanager
 from subprocess import PIPE, STDOUT
-from Queue import Empty
+try:
+    from queue import Empty  # Py 3
+except ImportError:
+    from Queue import Empty  # Py 2
 
 import nose
 import nose.tools as nt
diff --git a/IPython/kernel/zmq/eventloops.py b/IPython/kernel/zmq/eventloops.py
index 70da2ab..0335075 100644
--- a/IPython/kernel/zmq/eventloops.py
+++ b/IPython/kernel/zmq/eventloops.py
@@ -92,14 +92,17 @@ def loop_wx(kernel):
 def loop_tk(kernel):
     """Start a kernel with the Tk event loop."""
 
-    import Tkinter
+    try:
+        from tkinter import Tk  # Py 3
+    except ImportError:
+        from Tkinter import Tk  # Py 2
     doi = kernel.do_one_iteration
     # Tk uses milliseconds
     poll_interval = int(1000*kernel._poll_interval)
     # For Tkinter, we create a Tk object and call its withdraw method.
     class Timer(object):
         def __init__(self, func):
-            self.app = Tkinter.Tk()
+            self.app = Tk()
             self.app.withdraw()
             self.func = func
 
diff --git a/IPython/kernel/zmq/parentpoller.py b/IPython/kernel/zmq/parentpoller.py
index 7a6e31d..7e38c34 100644
--- a/IPython/kernel/zmq/parentpoller.py
+++ b/IPython/kernel/zmq/parentpoller.py
@@ -6,7 +6,10 @@ except:
 import os
 import platform
 import time
-from thread import interrupt_main
+try:
+    from _thread import interrupt_main  # Py 3
+except ImportError:
+    from thread import interrupt_main  # Py 2
 from threading import Thread
 
 from IPython.utils.warn import warn
diff --git a/IPython/lib/clipboard.py b/IPython/lib/clipboard.py
index cb3dffd..4dc6e45 100644
--- a/IPython/lib/clipboard.py
+++ b/IPython/lib/clipboard.py
@@ -41,11 +41,14 @@ def tkinter_clipboard_get():
     implementation that uses that toolkit.
     """
     try:
-        import Tkinter
+        from tkinter import Tk  # Py 3
     except ImportError:
-        raise TryNext("Getting text from the clipboard on this platform "
-                      "requires Tkinter.")
-    root = Tkinter.Tk()
+        try:
+            from Tkinter import Tk  # Py 2
+        except ImportError:
+            raise TryNext("Getting text from the clipboard on this platform "
+                          "requires Tkinter.")
+    root = Tk()
     root.withdraw()
     text = root.clipboard_get()
     root.destroy()
diff --git a/IPython/lib/inputhook.py b/IPython/lib/inputhook.py
index 5ae158c..bdb7be3 100644
--- a/IPython/lib/inputhook.py
+++ b/IPython/lib/inputhook.py
@@ -320,8 +320,8 @@ class InputHookManager(object):
         """
         self._current_gui = GUI_TK
         if app is None:
-            import Tkinter
-            app = Tkinter.Tk()
+            import tkinter
+            app = tkinter.Tk()
             app.withdraw()
             self._apps[GUI_TK] = app
             return app
diff --git a/IPython/lib/pretty.py b/IPython/lib/pretty.py
index e4bb727..0e574bc 100644
--- a/IPython/lib/pretty.py
+++ b/IPython/lib/pretty.py
@@ -109,7 +109,7 @@ import sys
 import types
 import re
 import datetime
-from StringIO import StringIO
+from io import StringIO
 from collections import deque
 
 
diff --git a/IPython/lib/tests/test_irunner.py b/IPython/lib/tests/test_irunner.py
index d3d0e88..527d5fb 100644
--- a/IPython/lib/tests/test_irunner.py
+++ b/IPython/lib/tests/test_irunner.py
@@ -8,7 +8,7 @@ from __future__ import print_function
 VERBOSE = True
 
 # stdlib imports
-import StringIO
+import io
 import sys
 import unittest
 
@@ -20,7 +20,7 @@ from IPython.utils.py3compat import doctest_refactor_print
 class RunnerTestCase(unittest.TestCase):
 
     def setUp(self):
-        self.out = StringIO.StringIO()
+        self.out = io.StringIO()
         #self.out = sys.stdout
 
     def _test_runner(self,runner,source,output):
diff --git a/IPython/lib/tests/test_irunner_pylab_magic.py b/IPython/lib/tests/test_irunner_pylab_magic.py
index dc7740d..31d4f02 100644
--- a/IPython/lib/tests/test_irunner_pylab_magic.py
+++ b/IPython/lib/tests/test_irunner_pylab_magic.py
@@ -7,7 +7,7 @@ from __future__ import print_function
 VERBOSE = True
 
 # stdlib imports
-import StringIO
+import io
 import sys
 import unittest
 import re
@@ -28,7 +28,7 @@ def pylab_not_importable():
 class RunnerTestCase(unittest.TestCase):
 
     def setUp(self):
-        self.out = StringIO.StringIO()
+        self.out = io.StringIO()
         #self.out = sys.stdout
 
     def _test_runner(self,runner,source,output):
diff --git a/IPython/nbconvert/writers/tests/test_debug.py b/IPython/nbconvert/writers/tests/test_debug.py
index a58552a..08ab03e 100644
--- a/IPython/nbconvert/writers/tests/test_debug.py
+++ b/IPython/nbconvert/writers/tests/test_debug.py
@@ -15,7 +15,7 @@ Module with tests for debug
 #-----------------------------------------------------------------------------
 
 import sys
-from StringIO import StringIO
+from io import StringIO
 
 from ...tests.base import TestsBase
 from ..debug import DebugWriter
diff --git a/IPython/nbconvert/writers/tests/test_files.py b/IPython/nbconvert/writers/tests/test_files.py
index ba3e7f9..02296b8 100644
--- a/IPython/nbconvert/writers/tests/test_files.py
+++ b/IPython/nbconvert/writers/tests/test_files.py
@@ -16,7 +16,7 @@ Module with tests for files
 
 import sys
 import os
-from StringIO import StringIO
+from io import StringIO
 
 from ...tests.base import TestsBase
 from ..files import FilesWriter
diff --git a/IPython/nbconvert/writers/tests/test_stdout.py b/IPython/nbconvert/writers/tests/test_stdout.py
index 648cf02..4d97f9e 100644
--- a/IPython/nbconvert/writers/tests/test_stdout.py
+++ b/IPython/nbconvert/writers/tests/test_stdout.py
@@ -15,7 +15,7 @@ Module with tests for stdout
 #-----------------------------------------------------------------------------
 
 import sys
-from StringIO import StringIO
+from io import StringIO
 
 from ...tests.base import TestsBase
 from ..stdout import StdoutWriter
diff --git a/IPython/parallel/controller/sqlitedb.py b/IPython/parallel/controller/sqlitedb.py
index cf3c3e7..336e9bf 100644
--- a/IPython/parallel/controller/sqlitedb.py
+++ b/IPython/parallel/controller/sqlitedb.py
@@ -13,7 +13,10 @@ Authors:
 
 import json
 import os
-import cPickle as pickle
+try:
+    import cPickle as pickle
+except ImportError:
+    import pickle
 from datetime import datetime
 
 try:
diff --git a/IPython/parallel/tests/clienttest.py b/IPython/parallel/tests/clienttest.py
index 6b65894..5e897c5 100644
--- a/IPython/parallel/tests/clienttest.py
+++ b/IPython/parallel/tests/clienttest.py
@@ -16,7 +16,7 @@ from __future__ import print_function
 import sys
 import tempfile
 import time
-from StringIO import StringIO
+from io import StringIO
 
 from nose import SkipTest
 
diff --git a/IPython/sphinxext/ipython_directive.py b/IPython/sphinxext/ipython_directive.py
index 9942e5e..df0342f 100644
--- a/IPython/sphinxext/ipython_directive.py
+++ b/IPython/sphinxext/ipython_directive.py
@@ -58,7 +58,7 @@ from __future__ import print_function
 #-----------------------------------------------------------------------------
 
 # Stdlib
-import cStringIO
+import io
 import os
 import re
 import sys
@@ -193,7 +193,7 @@ class EmbeddedSphinxShell(object):
 
     def __init__(self):
 
-        self.cout = cStringIO.StringIO()
+        self.cout = io.StringIO()
 
 
         # Create config object for IPython
diff --git a/IPython/terminal/console/completer.py b/IPython/terminal/console/completer.py
index baa6cf7..a435146 100644
--- a/IPython/terminal/console/completer.py
+++ b/IPython/terminal/console/completer.py
@@ -1,6 +1,9 @@
 # -*- coding: utf-8 -*-
 import readline
-from Queue import Empty
+try:
+    from queue import Empty  # Py 3
+except ImportError:
+    from Queue import Empty  # Py 2
 
 from IPython.config import Configurable
 from IPython.utils.traitlets import Float
diff --git a/IPython/terminal/console/interactiveshell.py b/IPython/terminal/console/interactiveshell.py
index 9d4c499..9c32317 100644
--- a/IPython/terminal/console/interactiveshell.py
+++ b/IPython/terminal/console/interactiveshell.py
@@ -23,7 +23,10 @@ import subprocess
 from io import BytesIO
 import base64
 
-from Queue import Empty
+try:
+    from queue import Empty  # Py 3
+except ImportError:
+    from Queue import Empty  # Py 2
 
 from IPython.core import page
 from IPython.utils.warn import warn, error
diff --git a/IPython/testing/plugin/ipdoctest.py b/IPython/testing/plugin/ipdoctest.py
index 21fae2a..8bcba9b 100644
--- a/IPython/testing/plugin/ipdoctest.py
+++ b/IPython/testing/plugin/ipdoctest.py
@@ -19,7 +19,6 @@ Limitations:
 # Module imports
 
 # From the standard library
-import commands
 import doctest
 import inspect
 import logging
@@ -30,7 +29,7 @@ import traceback
 import unittest
 
 from inspect import getmodule
-from StringIO import StringIO
+from io import StringIO
 
 # We are overriding the default doctest runner, so we need to import a few
 # things from doctest directly
diff --git a/IPython/utils/PyColorize.py b/IPython/utils/PyColorize.py
index 2fd8898..074b95d 100644
--- a/IPython/utils/PyColorize.py
+++ b/IPython/utils/PyColorize.py
@@ -38,7 +38,7 @@ _scheme_default = 'Linux'
 
 
 # Imports
-import StringIO
+import io
 import keyword
 import os
 import sys
@@ -143,13 +143,13 @@ class Parser:
 
         string_output = 0
         if out == 'str' or self.out == 'str' or \
-           isinstance(self.out,StringIO.StringIO):
+           isinstance(self.out,io.StringIO):
             # XXX - I don't really like this state handling logic, but at this
             # point I don't want to make major changes, so adding the
             # isinstance() check is the simplest I can do to ensure correct
             # behavior.
             out_old = self.out
-            self.out = StringIO.StringIO()
+            self.out = io.StringIO()
             string_output = 1
         elif out is not None:
             self.out = out
@@ -183,7 +183,7 @@ class Parser:
 
         # parse the source and write it
         self.pos = 0
-        text = StringIO.StringIO(self.raw)
+        text = io.StringIO(self.raw)
 
         error = False
         try:
diff --git a/IPython/utils/capture.py b/IPython/utils/capture.py
index a663f3e..e7b96ac 100644
--- a/IPython/utils/capture.py
+++ b/IPython/utils/capture.py
@@ -16,7 +16,7 @@ from __future__ import print_function
 #-----------------------------------------------------------------------------
 
 import sys
-from StringIO import StringIO
+from io import StringIO
 
 #-----------------------------------------------------------------------------
 # Classes and functions
diff --git a/IPython/utils/codeutil.py b/IPython/utils/codeutil.py
index b8968bf..a51af71 100644
--- a/IPython/utils/codeutil.py
+++ b/IPython/utils/codeutil.py
@@ -24,7 +24,11 @@ __docformat__ = "restructuredtext en"
 #-------------------------------------------------------------------------------
 
 import sys
-import types, copy_reg
+import types
+try:
+    import copyreg  # Py 3
+except ImportError:
+    import copy_reg as copyreg  # Py 2
 
 def code_ctor(*args):
     return types.CodeType(*args)
@@ -40,4 +44,4 @@ def reduce_code(co):
         args.insert(1, co.co_kwonlyargcount)
     return code_ctor, tuple(args)
 
-copy_reg.pickle(types.CodeType, reduce_code)
\ No newline at end of file
+copyreg.pickle(types.CodeType, reduce_code)
\ No newline at end of file
diff --git a/IPython/utils/io.py b/IPython/utils/io.py
index 95b9b0e..60ed1c2 100644
--- a/IPython/utils/io.py
+++ b/IPython/utils/io.py
@@ -17,7 +17,6 @@ from __future__ import print_function
 import os
 import sys
 import tempfile
-from StringIO import StringIO
 from .capture import CapturedIO, capture_output
 from .py3compat import string_types
 
diff --git a/IPython/utils/path.py b/IPython/utils/path.py
index d490b94..21b5dec 100644
--- a/IPython/utils/path.py
+++ b/IPython/utils/path.py
@@ -206,7 +206,10 @@ def get_home_dir(require_writable=False):
     if not _writable_dir(homedir) and os.name == 'nt':
         # expanduser failed, use the registry to get the 'My Documents' folder.
         try:
-            import _winreg as wreg
+            try:
+                import winreg as wreg  # Py 3
+            except ImportError:
+                import _winreg as wreg  # Py 2
             key = wreg.OpenKey(
                 wreg.HKEY_CURRENT_USER,
                 "Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
diff --git a/IPython/utils/pickleshare.py b/IPython/utils/pickleshare.py
index 9c890da..3113b0d 100755
--- a/IPython/utils/pickleshare.py
+++ b/IPython/utils/pickleshare.py
@@ -37,7 +37,10 @@ from __future__ import print_function
 from IPython.external.path import path as Path
 import os,stat,time
 import collections
-import cPickle as pickle
+try:
+    import cPickle as pickle
+except ImportError:
+    import pickle
 import glob
 
 def gethashfile(key):
diff --git a/IPython/utils/tests/test_io.py b/IPython/utils/tests/test_io.py
index 2ece068..c3a099c 100644
--- a/IPython/utils/tests/test_io.py
+++ b/IPython/utils/tests/test_io.py
@@ -15,7 +15,7 @@ from __future__ import print_function
 
 import sys
 
-from StringIO import StringIO
+from io import StringIO
 from subprocess import Popen, PIPE
 import unittest
 
diff --git a/IPython/utils/tests/test_path.py b/IPython/utils/tests/test_path.py
index dc3a82d..01d20dc 100644
--- a/IPython/utils/tests/test_path.py
+++ b/IPython/utils/tests/test_path.py
@@ -37,15 +37,21 @@ from IPython.utils.tempdir import TemporaryDirectory
 
 # Platform-dependent imports
 try:
-    import _winreg as wreg
+    import winreg as wreg  # Py 3
 except ImportError:
-    #Fake _winreg module on none windows platforms
-    import types
-    wr_name = "winreg" if py3compat.PY3 else "_winreg"
-    sys.modules[wr_name] = types.ModuleType(wr_name)
-    import _winreg as wreg
-    #Add entries that needs to be stubbed by the testing code
-    (wreg.OpenKey, wreg.QueryValueEx,) = (None, None)
+    try:
+        import _winreg as wreg  # Py 2
+    except ImportError:
+        #Fake _winreg module on none windows platforms
+        import types
+        wr_name = "winreg" if py3compat.PY3 else "_winreg"
+        sys.modules[wr_name] = types.ModuleType(wr_name)
+        try:
+            import winreg as wreg
+        except ImportError:
+            import _winreg as wreg
+        #Add entries that needs to be stubbed by the testing code
+        (wreg.OpenKey, wreg.QueryValueEx,) = (None, None)
 
 try:
     reload