diff --git a/IPython/Extensions/pickleshare.py b/IPython/Extensions/pickleshare.py
old mode 100644
new mode 100755
index 976ae8d..40bfb8b
--- a/IPython/Extensions/pickleshare.py
+++ b/IPython/Extensions/pickleshare.py
@@ -40,8 +40,6 @@ import UserDict
 import warnings
 import glob
 
-from sets import Set as set
-
 def gethashfile(key):
     return ("%02x" % abs(hash(key) % 256))[-2:]
 
diff --git a/IPython/Magic.py b/IPython/Magic.py
index e9d3437..b1b3ce7 100644
--- a/IPython/Magic.py
+++ b/IPython/Magic.py
@@ -29,7 +29,6 @@ import textwrap
 from cStringIO import StringIO
 from getopt import getopt,GetoptError
 from pprint import pprint, pformat
-from sets import Set
 
 # cProfile was added in Python2.5
 try:
@@ -69,7 +68,7 @@ def compress_dhist(dh):
     head, tail = dh[:-10], dh[-10:]
 
     newhead = []
-    done = Set()
+    done = set()
     for h in head:
         if h in done:
             continue
@@ -143,7 +142,7 @@ python-profiler package from non-free.""")
                  filter(inst_magic,self.__dict__.keys()) + \
                  filter(inst_bound_magic,self.__class__.__dict__.keys())
         out = []
-        for fn in Set(magics):
+        for fn in set(magics):
             out.append(fn.replace('magic_','',1))
         out.sort()
         return out
diff --git a/IPython/external/mglob.py b/IPython/external/mglob.py
old mode 100644
new mode 100755
index 3810f32..ed3679f
--- a/IPython/external/mglob.py
+++ b/IPython/external/mglob.py
@@ -73,8 +73,6 @@ __version__ = "0.2"
 
 
 import os,glob,fnmatch,sys,re
-from sets import Set as set
-
                 
 def expand(flist,exp_dirs = False):
     """ Expand the glob(s) in flist.
diff --git a/IPython/iplib.py b/IPython/iplib.py
index b974ba5..9fc3e23 100644
--- a/IPython/iplib.py
+++ b/IPython/iplib.py
@@ -47,9 +47,6 @@ import sys
 import tempfile
 import traceback
 import types
-import warnings
-warnings.filterwarnings('ignore', r'.*sets module*')
-from sets import Set
 from pprint import pprint, pformat
 
 # IPython's own modules
@@ -1955,7 +1952,7 @@ want to merge them back into the new files.""" % locals()
         """
         line = fn + " " + rest
         
-        done = Set()
+        done = set()
         while 1:
             pre,fn,rest = prefilter.splitUserInput(line,
                                                    prefilter.shell_line_split)
diff --git a/IPython/kernel/tests/engineservicetest.py b/IPython/kernel/tests/engineservicetest.py
index 4a1c6f8..9544db3 100644
--- a/IPython/kernel/tests/engineservicetest.py
+++ b/IPython/kernel/tests/engineservicetest.py
@@ -49,8 +49,8 @@ validCommands = ['a=5',
 time.sleep(0.1)""",
                 """from math import cos;
 x = 1.0*cos(0.5)""", # Semicolons lead to Discard ast nodes that should be discarded
-                """from sets import Set
-s = Set()
+                """s = 1
+s = set()
    """, # Trailing whitespace should be allowed.
                 """import math
 math.cos(1.0)""", # Test a method call with a discarded return value