diff --git a/IPython/config/loader.py b/IPython/config/loader.py
index 1051cde..a29e5d5 100644
--- a/IPython/config/loader.py
+++ b/IPython/config/loader.py
@@ -35,7 +35,7 @@ from IPython.utils.path import filefind, get_ipython_dir
 from IPython.utils import py3compat
 from IPython.utils.encoding import DEFAULT_ENCODING
 from IPython.utils.py3compat import unicode_type, iteritems
-from IPython.utils.traitlets import HasTraits, List, Any, TraitError
+from IPython.utils.traitlets import HasTraits, List, Any
 
 #-----------------------------------------------------------------------------
 # Exceptions
diff --git a/IPython/core/application.py b/IPython/core/application.py
index 8e02ffa..5608de1 100644
--- a/IPython/core/application.py
+++ b/IPython/core/application.py
@@ -28,7 +28,6 @@ Authors:
 #-----------------------------------------------------------------------------
 
 import atexit
-import errno
 import glob
 import logging
 import os
diff --git a/IPython/core/completer.py b/IPython/core/completer.py
index b1bc646..8ce61c7 100644
--- a/IPython/core/completer.py
+++ b/IPython/core/completer.py
@@ -79,7 +79,6 @@ from IPython.config.configurable import Configurable
 from IPython.core.error import TryNext
 from IPython.core.inputsplitter import ESC_MAGIC
 from IPython.utils import generics
-from IPython.utils import io
 from IPython.utils.dir2 import dir2
 from IPython.utils.process import arg_split
 from IPython.utils.py3compat import builtin_mod, string_types
diff --git a/IPython/core/formatters.py b/IPython/core/formatters.py
index 4e6fd76..51077e9 100644
--- a/IPython/core/formatters.py
+++ b/IPython/core/formatters.py
@@ -35,11 +35,9 @@ from IPython.external.decorator import decorator
 # Our own imports
 from IPython.config.configurable import Configurable
 from IPython.lib import pretty
-from IPython.utils import io
 from IPython.utils.traitlets import (
     Bool, Dict, Integer, Unicode, CUnicode, ObjectName, List,
 )
-from IPython.utils.warn import warn
 from IPython.utils.py3compat import (
     unicode_to_str, with_metaclass, PY3, string_types, unicode_type,
 )
diff --git a/IPython/core/profiledir.py b/IPython/core/profiledir.py
index 508d90c..bff81e2 100644
--- a/IPython/core/profiledir.py
+++ b/IPython/core/profiledir.py
@@ -7,7 +7,6 @@
 import os
 import shutil
 import errno
-import time
 
 from IPython.config.configurable import LoggingConfigurable
 from IPython.utils.path import get_ipython_package_dir, expand_path, ensure_dir_exists
diff --git a/IPython/core/pylabtools.py b/IPython/core/pylabtools.py
index 5f00e92..a4b396a 100644
--- a/IPython/core/pylabtools.py
+++ b/IPython/core/pylabtools.py
@@ -20,7 +20,6 @@ from __future__ import print_function
 # Imports
 #-----------------------------------------------------------------------------
 
-import sys
 from io import BytesIO
 
 from IPython.core.display import _pngxy
diff --git a/IPython/core/shellapp.py b/IPython/core/shellapp.py
index f957cc9..e7b57b1 100644
--- a/IPython/core/shellapp.py
+++ b/IPython/core/shellapp.py
@@ -35,7 +35,7 @@ from IPython.utils import py3compat
 from IPython.utils.contexts import preserve_keys
 from IPython.utils.path import filefind
 from IPython.utils.traitlets import (
-    Unicode, Instance, List, Bool, CaselessStrEnum, Dict
+    Unicode, Instance, List, Bool, CaselessStrEnum
 )
 from IPython.lib.inputhook import guis
 
diff --git a/IPython/external/qt_for_kernel.py b/IPython/external/qt_for_kernel.py
index d360054..d478c55 100644
--- a/IPython/external/qt_for_kernel.py
+++ b/IPython/external/qt_for_kernel.py
@@ -34,7 +34,6 @@ else:
 import os
 import sys
 
-from IPython.utils.warn import warn
 from IPython.utils.version import check_version
 from IPython.external.qt_loaders import (load_qt, QT_API_PYSIDE,
                                          QT_API_PYQT, QT_API_PYQT_DEFAULT,
diff --git a/IPython/html/nbconvert/handlers.py b/IPython/html/nbconvert/handlers.py
index 1cb9ba9..fb97f5f 100644
--- a/IPython/html/nbconvert/handlers.py
+++ b/IPython/html/nbconvert/handlers.py
@@ -7,11 +7,8 @@ from tornado import web
 from ..base.handlers import IPythonHandler, notebook_path_regex
 from IPython.nbformat.current import to_notebook_json
 
-from IPython.utils import tz
 from IPython.utils.py3compat import cast_bytes
 
-import sys
-
 def find_resource_files(output_files_dir):
     files = []
     for dirpath, dirnames, filenames in os.walk(output_files_dir):
@@ -137,4 +134,4 @@ default_handlers = [
     (r"/nbconvert/%s%s" % (_format_regex, notebook_path_regex),
          NbconvertFileHandler),
     (r"/nbconvert/%s" % _format_regex, NbconvertPostHandler),
-]
\ No newline at end of file
+]
diff --git a/IPython/html/services/kernels/kernelmanager.py b/IPython/html/services/kernels/kernelmanager.py
index 5ff0751..ff27b59 100644
--- a/IPython/html/services/kernels/kernelmanager.py
+++ b/IPython/html/services/kernels/kernelmanager.py
@@ -21,9 +21,7 @@ import os
 from tornado import web
 
 from IPython.kernel.multikernelmanager import MultiKernelManager
-from IPython.utils.traitlets import (
-    Dict, List, Unicode,
-)
+from IPython.utils.traitlets import List, Unicode, TraitError
 
 from IPython.html.utils import to_os_path
 from IPython.utils.py3compat import getcwd
diff --git a/IPython/html/services/kernels/tests/test_kernels_api.py b/IPython/html/services/kernels/tests/test_kernels_api.py
index 52b6cf2..5e624a7 100644
--- a/IPython/html/services/kernels/tests/test_kernels_api.py
+++ b/IPython/html/services/kernels/tests/test_kernels_api.py
@@ -1,10 +1,6 @@
 """Test the kernels service API."""
 
 
-import os
-import sys
-import json
-
 import requests
 
 from IPython.html.utils import url_path_join
diff --git a/IPython/html/tree/handlers.py b/IPython/html/tree/handlers.py
index e5adf03..b58fe67 100644
--- a/IPython/html/tree/handlers.py
+++ b/IPython/html/tree/handlers.py
@@ -15,11 +15,9 @@ Authors:
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
-import os
-
 from tornado import web
 from ..base.handlers import IPythonHandler, notebook_path_regex, path_regex
-from ..utils import url_path_join, path2url, url2path, url_escape, is_hidden
+from ..utils import url_path_join, url_escape
 
 #-----------------------------------------------------------------------------
 # Handlers
diff --git a/IPython/nbconvert/nbconvertapp.py b/IPython/nbconvert/nbconvertapp.py
index 0ef2072..c49c077 100755
--- a/IPython/nbconvert/nbconvertapp.py
+++ b/IPython/nbconvert/nbconvertapp.py
@@ -21,7 +21,6 @@ from IPython.utils.traitlets import (
     Unicode, List, Instance, DottedObjectName, Type, CaselessStrEnum,
 )
 from IPython.utils.importstring import import_item
-from IPython.utils.text import dedent
 
 from .exporters.export import get_export_names, exporter_map
 from IPython.nbconvert import exporters, preprocessors, writers, postprocessors
diff --git a/IPython/nbformat/convert.py b/IPython/nbformat/convert.py
index 7ae96ee..049883a 100644
--- a/IPython/nbformat/convert.py
+++ b/IPython/nbformat/convert.py
@@ -16,8 +16,6 @@ Authors:
 # Imports
 #-----------------------------------------------------------------------------
 
-import re
-
 from .reader import get_version, versions
 
 #-----------------------------------------------------------------------------
diff --git a/IPython/parallel/factory.py b/IPython/parallel/factory.py
index 4636136..92a3d9c 100644
--- a/IPython/parallel/factory.py
+++ b/IPython/parallel/factory.py
@@ -16,19 +16,11 @@ Authors:
 # Imports
 #-----------------------------------------------------------------------------
 
-
-import logging
-import os
-
-import zmq
-from zmq.eventloop.ioloop import IOLoop
-
-from IPython.config.configurable import Configurable
 from IPython.utils.localinterfaces import localhost
-from IPython.utils.traitlets import Integer, Instance, Unicode
+from IPython.utils.traitlets import Integer, Unicode
 
 from IPython.parallel.util import select_random_ports
-from IPython.kernel.zmq.session import Session, SessionFactory
+from IPython.kernel.zmq.session import SessionFactory
 
 #-----------------------------------------------------------------------------
 # Classes
diff --git a/IPython/parallel/util.py b/IPython/parallel/util.py
index 03e09b8..ee4084f 100644
--- a/IPython/parallel/util.py
+++ b/IPython/parallel/util.py
@@ -33,9 +33,7 @@ from IPython.config.application import Application
 from IPython.utils.localinterfaces import localhost, is_public_ip, public_ips
 from IPython.utils.py3compat import string_types, iteritems, itervalues
 from IPython.kernel.zmq.log import EnginePUBHandler
-from IPython.kernel.zmq.serialize import (
-    unserialize_object, serialize_object, pack_apply_message, unpack_apply_message
-)
+
 
 #-----------------------------------------------------------------------------
 # Classes
@@ -387,4 +385,4 @@ def set_hwm(sock, hwm=0):
         except zmq.ZMQError:
             pass
 
-        
\ No newline at end of file
+        
diff --git a/IPython/terminal/ipapp.py b/IPython/terminal/ipapp.py
index b98cd88..658b2cf 100755
--- a/IPython/terminal/ipapp.py
+++ b/IPython/terminal/ipapp.py
@@ -30,9 +30,7 @@ import logging
 import os
 import sys
 
-from IPython.config.loader import (
-    Config, PyFileConfigLoader, ConfigFileNotFound
-)
+from IPython.config.loader import Config
 from IPython.config.application import boolean_flag, catch_config_error, Application
 from IPython.core import release
 from IPython.core import usage
diff --git a/IPython/utils/pickleshare.py b/IPython/utils/pickleshare.py
index 36211c1..e0f23f3 100755
--- a/IPython/utils/pickleshare.py
+++ b/IPython/utils/pickleshare.py
@@ -35,7 +35,7 @@ License: MIT open source license.
 from __future__ import print_function
 
 from IPython.external.path import path as Path
-import os,stat,time
+import stat, time
 import collections
 try:
     import cPickle as pickle
diff --git a/IPython/utils/process.py b/IPython/utils/process.py
index 2e8d0f9..a7a54ea 100644
--- a/IPython/utils/process.py
+++ b/IPython/utils/process.py
@@ -18,7 +18,6 @@ from __future__ import print_function
 # Stdlib
 import os
 import sys
-import shlex
 
 # Our own
 if sys.platform == 'win32':
diff --git a/docs/gh-pages.py b/docs/gh-pages.py
index 3294bf8..b32cf5d 100755
--- a/docs/gh-pages.py
+++ b/docs/gh-pages.py
@@ -15,7 +15,6 @@ something like 'current' as a stable URL for the most current version of the """
 # Imports
 #-----------------------------------------------------------------------------
 import os
-import re
 import shutil
 import sys
 from os import chdir as cd
diff --git a/examples/Customization/appconfig.py b/examples/Customization/appconfig.py
index c2e4d26..0d1c266 100644
--- a/examples/Customization/appconfig.py
+++ b/examples/Customization/appconfig.py
@@ -33,7 +33,7 @@ the trait's events for all of the config=True attributes.
 from IPython.config.configurable import Configurable
 from IPython.config.application import Application
 from IPython.utils.traitlets import (
-    Bool, Unicode, Int, Float, List, Dict
+    Bool, Unicode, Int, List, Dict
 )
 
 
diff --git a/setupext/setupext.py b/setupext/setupext.py
index f8e4b59..070b3e3 100644
--- a/setupext/setupext.py
+++ b/setupext/setupext.py
@@ -14,7 +14,7 @@ __docformat__ = "restructuredtext en"
 # Imports
 #-------------------------------------------------------------------------------
 
-import sys, os
+import sys
 from textwrap import fill
 
 display_status=True
diff --git a/tools/github_stats.py b/tools/github_stats.py
index abe1bbe..dcd2d13 100755
--- a/tools/github_stats.py
+++ b/tools/github_stats.py
@@ -12,8 +12,6 @@ To generate a report for IPython 2.0, run:
 from __future__ import print_function
 
 import codecs
-import json
-import re
 import sys
 
 from argparse import ArgumentParser
diff --git a/tools/make_tarball.py b/tools/make_tarball.py
index 33c5ec5..3e59a4f 100755
--- a/tools/make_tarball.py
+++ b/tools/make_tarball.py
@@ -4,10 +4,8 @@
 
 import commands
 import os
-import sys
-import shutil
 
-from  toollib import *
+from toollib import cd, sh
 
 tag = commands.getoutput('git describe --tags')
 base_name = 'ipython-%s' % tag
diff --git a/tools/toollib.py b/tools/toollib.py
index 41b9dd3..65f9eb4 100644
--- a/tools/toollib.py
+++ b/tools/toollib.py
@@ -6,8 +6,6 @@ from __future__ import print_function
 import os
 import sys
 
-from distutils.dir_util import remove_tree
-
 # Useful shorthands
 pjoin = os.path.join
 cd = os.chdir