From: Benjamin Peterson <benjamin@python.org>
Date: Mon, 31 Mar 2008 01:51:45 +0000 (+0000)
Subject: Merged revisions 62021,62029,62035-62038,62043-62044,62052-62053 via svnmerge from
X-Git-Tag: v3.0a4~23
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=2a691a814914a9d2b2188cac25426543a14a8500;p=thirdparty%2FPython%2Fcpython.git

Merged revisions 62021,62029,62035-62038,62043-62044,62052-62053 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

........
  r62021 | benjamin.peterson | 2008-03-28 18:11:01 -0500 (Fri, 28 Mar 2008) | 2 lines

  NIL => NULL
........
  r62029 | amaury.forgeotdarc | 2008-03-28 20:42:31 -0500 (Fri, 28 Mar 2008) | 3 lines

  Correctly call the base class tearDown();
  otherwise running test_logging twice produce the errors we see on all buildbots
........
  r62035 | raymond.hettinger | 2008-03-29 05:42:07 -0500 (Sat, 29 Mar 2008) | 1 line

  Be explicit about what efficient means.
........
  r62036 | georg.brandl | 2008-03-29 06:46:18 -0500 (Sat, 29 Mar 2008) | 2 lines

  Fix capitalization.
........
  r62037 | amaury.forgeotdarc | 2008-03-29 07:42:54 -0500 (Sat, 29 Mar 2008) | 5 lines

  lib2to3 should install a logging handler only when run as a main program,
  not when used as a library.

  This may please the buildbots, which fail when test_lib2to3 is run before test_logging.
........
  r62043 | benjamin.peterson | 2008-03-29 10:24:25 -0500 (Sat, 29 Mar 2008) | 3 lines

  #2503 make singletons compared with "is" not == or !=
  Thanks to Wummel for the patch
........
  r62044 | gerhard.haering | 2008-03-29 14:11:52 -0500 (Sat, 29 Mar 2008) | 2 lines

  Documented the lastrowid attribute.
........
  r62052 | benjamin.peterson | 2008-03-30 14:35:10 -0500 (Sun, 30 Mar 2008) | 2 lines

  Updated README regarding doc formats
........
  r62053 | georg.brandl | 2008-03-30 14:41:39 -0500 (Sun, 30 Mar 2008) | 2 lines

  The other download formats will be available for 2.6 too.
........
---

diff --git a/Demo/classes/Dbm.py b/Demo/classes/Dbm.py
index ecc117d49537..617fe9981928 100755
--- a/Demo/classes/Dbm.py
+++ b/Demo/classes/Dbm.py
@@ -50,7 +50,7 @@ def test():
                 value = d[key]
                 print('currently:', value)
             value = eval(input('value: '))
-            if value == None:
+            if value is None:
                 del d[key]
             else:
                 d[key] = value
diff --git a/Demo/curses/ncurses.py b/Demo/curses/ncurses.py
index fc22ff7be5e3..0bdc1a97e62a 100644
--- a/Demo/curses/ncurses.py
+++ b/Demo/curses/ncurses.py
@@ -9,7 +9,7 @@ import curses
 from curses import panel
 
 def wGetchar(win = None):
-    if win == None: win = stdscr
+    if win is None: win = stdscr
     return win.getch()
 
 def Getchar():
diff --git a/Demo/rpc/mountclient.py b/Demo/rpc/mountclient.py
index 3bb88b1f85b2..81797df8ba1d 100644
--- a/Demo/rpc/mountclient.py
+++ b/Demo/rpc/mountclient.py
@@ -100,7 +100,7 @@ class PartialMountClient:
     # This function is called to cough up a suitable
     # authentication object for a call to procedure 'proc'.
     def mkcred(self):
-        if self.cred == None:
+        if self.cred is None:
             self.cred = rpc.AUTH_UNIX, rpc.make_auth_unix_default()
         return self.cred
 
diff --git a/Demo/rpc/nfsclient.py b/Demo/rpc/nfsclient.py
index aad8cf30009d..c36e3d28dd61 100644
--- a/Demo/rpc/nfsclient.py
+++ b/Demo/rpc/nfsclient.py
@@ -129,7 +129,7 @@ class NFSClient(UDPClient):
         self.unpacker = NFSUnpacker('')
 
     def mkcred(self):
-        if self.cred == None:
+        if self.cred is None:
             self.cred = rpc.AUTH_UNIX, rpc.make_auth_unix_default()
         return self.cred
 
@@ -170,7 +170,7 @@ class NFSClient(UDPClient):
             for fileid, name, cookie in entries:
                 list.append((fileid, name))
                 last_cookie = cookie
-            if eof or last_cookie == None:
+            if eof or last_cookie is None:
                 break
             ra = (ra[0], last_cookie, ra[2])
         return list
@@ -184,7 +184,7 @@ def test():
     else: filesys = None
     from mountclient import UDPMountClient, TCPMountClient
     mcl = TCPMountClient(host)
-    if filesys == None:
+    if filesys is None:
         list = mcl.Export()
         for item in list:
             print(item)
diff --git a/Demo/rpc/rpc.py b/Demo/rpc/rpc.py
index 99115d343692..789880bbfc3c 100644
--- a/Demo/rpc/rpc.py
+++ b/Demo/rpc/rpc.py
@@ -260,13 +260,13 @@ class Client:
 
     def mkcred(self):
         # Override this to use more powerful credentials
-        if self.cred == None:
+        if self.cred is None:
             self.cred = (AUTH_NULL, make_auth_null())
         return self.cred
 
     def mkverf(self):
         # Override this to use a more powerful verifier
-        if self.verf == None:
+        if self.verf is None:
             self.verf = (AUTH_NULL, make_auth_null())
         return self.verf
 
@@ -317,7 +317,7 @@ last_resv_port_tried = None
 def bindresvport(sock, host):
     global last_resv_port_tried
     FIRST, LAST = 600, 1024 # Range of ports to try
-    if last_resv_port_tried == None:
+    if last_resv_port_tried is None:
         import os
         last_resv_port_tried = FIRST + os.getpid() % (LAST-FIRST)
     for i in range(last_resv_port_tried, LAST) + \
@@ -811,7 +811,7 @@ class UDPServer(Server):
     def session(self):
         call, host_port = self.sock.recvfrom(8192)
         reply = self.handle(call)
-        if reply != None:
+        if reply is not None:
             self.sock.sendto(reply, host_port)
 
 
diff --git a/Demo/tkinter/guido/paint.py b/Demo/tkinter/guido/paint.py
index d46e20b9ade4..7b2e814c6571 100644
--- a/Demo/tkinter/guido/paint.py
+++ b/Demo/tkinter/guido/paint.py
@@ -50,7 +50,7 @@ def b1up(event):
 def motion(event):
     if b1 == "down":
         global xold, yold
-        if xold != None and yold != None:
+        if xold is not None and yold is not None:
             event.widget.create_line(xold,yold,event.x,event.y,smooth=TRUE)
                           # here's where you draw it. smooth. neat.
         xold = event.x
diff --git a/Doc/library/array.rst b/Doc/library/array.rst
index efe80b7f88fd..08142e119fbc 100644
--- a/Doc/library/array.rst
+++ b/Doc/library/array.rst
@@ -3,12 +3,12 @@
 ===================================================
 
 .. module:: array
-   :synopsis: Efficient arrays of uniformly typed numeric values.
+   :synopsis: Space efficient arrays of uniformly typed numeric values.
 
 
 .. index:: single: arrays
 
-This module defines an object type which can efficiently represent an array of
+This module defines an object type which can compactly represent an array of
 basic values: characters, integers, floating point numbers.  Arrays are sequence
 types and behave very much like lists, except that the type of objects stored in
 them is constrained.  The type is specified at object creation time by using a
diff --git a/Include/object.h b/Include/object.h
index b4b9ce24e4cd..0c23e02e576e 100644
--- a/Include/object.h
+++ b/Include/object.h
@@ -562,7 +562,7 @@ the refcount falls to 0; for
 objects that don't contain references to other objects or heap memory
 this can be the standard function free().  Both macros can be used
 wherever a void expression is allowed.  The argument must not be a
-NIL pointer.  If it may be NIL, use Py_XINCREF/Py_XDECREF instead.
+NULL pointer.  If it may be NULL, use Py_XINCREF/Py_XDECREF instead.
 The macro _Py_NewReference(op) initialize reference counts to 1, and
 in special builds (Py_REF_DEBUG, Py_TRACE_REFS) performs additional
 bookkeeping appropriate to the special build.
diff --git a/Lib/bsddb/dbshelve.py b/Lib/bsddb/dbshelve.py
index 3727270b9056..7344945d5938 100644
--- a/Lib/bsddb/dbshelve.py
+++ b/Lib/bsddb/dbshelve.py
@@ -135,7 +135,7 @@ class DBShelf(MutableMapping):
 
 
     def keys(self, txn=None):
-        if txn != None:
+        if txn is not None:
             return self.db.keys(txn)
         else:
             return self.db.keys()
@@ -161,7 +161,7 @@ class DBShelf(MutableMapping):
 
 
     def items(self, txn=None):
-        if txn != None:
+        if txn is not None:
             items = self.db.items(txn)
         else:
             items = self.db.items()
@@ -172,7 +172,7 @@ class DBShelf(MutableMapping):
         return newitems
 
     def values(self, txn=None):
-        if txn != None:
+        if txn is not None:
             values = self.db.values(txn)
         else:
             values = self.db.values()
diff --git a/Lib/bsddb/test/test_basics.py b/Lib/bsddb/test/test_basics.py
index 4e070bd0619d..6b99cc1fdfbd 100644
--- a/Lib/bsddb/test/test_basics.py
+++ b/Lib/bsddb/test/test_basics.py
@@ -366,7 +366,7 @@ class BasicTestCase(unittest.TestCase):
         else:
             if set_raises_error:
                 self.fail("expected exception")
-            if n != None:
+            if n is not None:
                 self.fail("expected None: %r" % (n,))
 
         rec = c.get_both(b'0404', self.makeData(b'0404'))
@@ -380,7 +380,7 @@ class BasicTestCase(unittest.TestCase):
         else:
             if get_raises_error:
                 self.fail("expected exception")
-            if n != None:
+            if n is not None:
                 self.fail("expected None: %r" % (n,))
 
         if self.d.get_type() == db.DB_BTREE:
diff --git a/Lib/bsddb/test/test_dbtables.py b/Lib/bsddb/test/test_dbtables.py
index 8964de835747..f1328f0c8cd3 100644
--- a/Lib/bsddb/test/test_dbtables.py
+++ b/Lib/bsddb/test/test_dbtables.py
@@ -328,7 +328,7 @@ class TableDBTestCase(unittest.TestCase):
         self.tdb.Insert(tabname, {'Type': b'Unknown', 'Access': b'0'})
 
         def set_type(type):
-            if type == None:
+            if type is None:
                 return b'MP3'
             return type
 
diff --git a/Lib/idlelib/AutoComplete.py b/Lib/idlelib/AutoComplete.py
index b2b165789f2e..ac0827cc61f6 100644
--- a/Lib/idlelib/AutoComplete.py
+++ b/Lib/idlelib/AutoComplete.py
@@ -35,10 +35,9 @@ class AutoComplete:
                                    "popupwait", type="int", default=0)
 
     def __init__(self, editwin=None):
-        if editwin == None:  # subprocess and test
-            self.editwin = None
-            return
         self.editwin = editwin
+        if editwin is None:  # subprocess and test
+            return
         self.text = editwin.text
         self.autocompletewindow = None
 
diff --git a/Lib/idlelib/PyShell.py b/Lib/idlelib/PyShell.py
index 434df67b09c6..7c66088f56d1 100644
--- a/Lib/idlelib/PyShell.py
+++ b/Lib/idlelib/PyShell.py
@@ -922,7 +922,7 @@ class PyShell(OutputWindow):
                 "The program is still running!\n Do you want to kill it?",
                 default="ok",
                 parent=self.text)
-            if response == False:
+            if response is False:
                 return "cancel"
         if self.reading:
             self.top.quit()
diff --git a/Lib/lib-tk/Tkinter.py b/Lib/lib-tk/Tkinter.py
index 33b5ed01743e..23ebe547509e 100644
--- a/Lib/lib-tk/Tkinter.py
+++ b/Lib/lib-tk/Tkinter.py
@@ -187,7 +187,7 @@ class Variable:
         else:
             self._name = 'PY_VAR' + repr(_varnum)
             _varnum += 1
-        if value != None:
+        if value is not None:
             self.set(value)
         elif not self._tk.call("info", "exists", self._name):
             self.set(self._default)
diff --git a/Lib/lib-tk/turtle.py b/Lib/lib-tk/turtle.py
index 7cf298d799ce..960a9f61d508 100644
--- a/Lib/lib-tk/turtle.py
+++ b/Lib/lib-tk/turtle.py
@@ -749,25 +749,25 @@ def setup(**geometry):
     global _width, _height, _startx, _starty
 
     width = geometry.get('width',_width)
-    if width is None or width >= 0:
+    if width >= 0 or width is None:
         _width = width
     else:
         raise ValueError("width can not be less than 0")
 
     height = geometry.get('height',_height)
-    if height is None or height >= 0:
+    if height >= 0 or height is None:
         _height = height
     else:
         raise ValueError("height can not be less than 0")
 
     startx = geometry.get('startx', _startx)
-    if startx is None or startx >= 0:
+    if startx >= 0 or startx is None:
         _startx = _startx
     else:
         raise ValueError("startx can not be less than 0")
 
     starty = geometry.get('starty', _starty)
-    if starty is None or starty >= 0:
+    if starty >= 0 or starty is None:
         _starty = starty
     else:
         raise ValueError("startx can not be less than 0")
diff --git a/Lib/lib2to3/refactor.py b/Lib/lib2to3/refactor.py
index 49c9a03ae5c2..ae7d3cdfcd8e 100755
--- a/Lib/lib2to3/refactor.py
+++ b/Lib/lib2to3/refactor.py
@@ -28,15 +28,6 @@ from . import patcomp
 from . import fixes
 from . import pygram
 
-if sys.version_info < (2, 4):
-    hdlr = logging.StreamHandler()
-    fmt = logging.Formatter('%(name)s: %(message)s')
-    hdlr.setFormatter(fmt)
-    logging.root.addHandler(hdlr)
-else:
-    logging.basicConfig(format='%(name)s: %(message)s', level=logging.INFO)
-
-
 def main(args=None):
     """Main program.
 
@@ -73,6 +64,15 @@ def main(args=None):
         print("Use --help to show usage.", file=sys.stderr)
         return 2
 
+    # Set up logging handler
+    if sys.version_info < (2, 4):
+        hdlr = logging.StreamHandler()
+        fmt = logging.Formatter('%(name)s: %(message)s')
+        hdlr.setFormatter(fmt)
+        logging.root.addHandler(hdlr)
+    else:
+        logging.basicConfig(format='%(name)s: %(message)s', level=logging.INFO)
+
     # Initialize the refactoring tool
     rt = RefactoringTool(options)
 
diff --git a/Lib/plat-mac/EasyDialogs.py b/Lib/plat-mac/EasyDialogs.py
index 68beafa194fc..f697417a5064 100644
--- a/Lib/plat-mac/EasyDialogs.py
+++ b/Lib/plat-mac/EasyDialogs.py
@@ -78,7 +78,7 @@ def Message(msg, id=260, ok=None):
         return
     h = d.GetDialogItemAsControl(2)
     SetDialogItemText(h, lf2cr(msg))
-    if ok != None:
+    if ok is not None:
         h = d.GetDialogItemAsControl(1)
         h.SetControlTitle(ok)
     d.SetDialogDefaultItem(1)
@@ -115,10 +115,10 @@ def AskString(prompt, default = "", id=261, ok=None, cancel=None):
     SetDialogItemText(h, lf2cr(default))
     d.SelectDialogItemText(4, 0, 999)
 #       d.SetDialogItem(4, 0, 255)
-    if ok != None:
+    if ok is not None:
         h = d.GetDialogItemAsControl(1)
         h.SetControlTitle(ok)
-    if cancel != None:
+    if cancel is not None:
         h = d.GetDialogItemAsControl(2)
         h.SetControlTitle(cancel)
     d.SetDialogDefaultItem(1)
@@ -159,10 +159,10 @@ def AskPassword(prompt,  default='', id=264, ok=None, cancel=None):
     SetControlData(pwd, kControlEditTextPart, kControlEditTextPasswordTag, default)
     d.SelectDialogItemText(4, 0, 999)
     Ctl.SetKeyboardFocus(d.GetDialogWindow(), pwd, kControlEditTextPart)
-    if ok != None:
+    if ok is not None:
         h = d.GetDialogItemAsControl(1)
         h.SetControlTitle(ok)
-    if cancel != None:
+    if cancel is not None:
         h = d.GetDialogItemAsControl(2)
         h.SetControlTitle(cancel)
     d.SetDialogDefaultItem(Dialogs.ok)
@@ -203,19 +203,19 @@ def AskYesNoCancel(question, default = 0, yes=None, no=None, cancel=None, id=262
     # The question string is item 5
     h = d.GetDialogItemAsControl(5)
     SetDialogItemText(h, lf2cr(question))
-    if yes != None:
+    if yes is not None:
         if yes == '':
             d.HideDialogItem(2)
         else:
             h = d.GetDialogItemAsControl(2)
             h.SetControlTitle(yes)
-    if no != None:
+    if no is not None:
         if no == '':
             d.HideDialogItem(3)
         else:
             h = d.GetDialogItemAsControl(3)
             h.SetControlTitle(no)
-    if cancel != None:
+    if cancel is not None:
         if cancel == '':
             d.HideDialogItem(4)
         else:
@@ -316,7 +316,7 @@ class ProgressBar:
 
     def set(self, value, max=None):
         """set(value) - Set progress bar position"""
-        if max != None:
+        if max is not None:
             self.maxval = max
             bar = self.d.GetDialogItemAsControl(3)
             if max <= 0:    # indeterminate bar
diff --git a/Lib/plat-mac/FrameWork.py b/Lib/plat-mac/FrameWork.py
index 8f8be55349e2..fabd97e94712 100644
--- a/Lib/plat-mac/FrameWork.py
+++ b/Lib/plat-mac/FrameWork.py
@@ -92,7 +92,7 @@ _watch = None
 def setwatchcursor():
     global _watch
 
-    if _watch == None:
+    if _watch is None:
         _watch = GetCursor(4).data
     SetCursor(_watch)
 
@@ -129,7 +129,7 @@ class Application:
         self._quititem = MenuItem(m, "Quit", "Q", self._quit)
 
     def gethelpmenu(self):
-        if self._helpmenu == None:
+        if self._helpmenu is None:
             self._helpmenu = HelpMenu(self.menubar)
         return self._helpmenu
 
@@ -266,7 +266,7 @@ class Application:
         else:
             name = "do_%d" % partcode
 
-        if wid == None:
+        if wid is None:
             # No window, or a non-python window
             try:
                 handler = getattr(self, name)
@@ -475,7 +475,7 @@ class MenuBar:
         self.menus = None
 
     def addmenu(self, title, after = 0, id=None):
-        if id == None:
+        if id is None:
             id = self.getnextid()
         if DEBUG: print('Newmenu', title, id) # XXXX
         m = NewMenu(id, title)
@@ -907,8 +907,8 @@ class ScrolledWindow(ControlsWindow):
         self.barx_enabled = self.bary_enabled = 1
         x0, y0, x1, y1 = self.wid.GetWindowPort().GetPortBounds()
         vx, vy = self.getscrollbarvalues()
-        if vx == None: self.barx_enabled, vx = 0, 0
-        if vy == None: self.bary_enabled, vy = 0, 0
+        if vx is None: self.barx_enabled, vx = 0, 0
+        if vy is None: self.bary_enabled, vy = 0, 0
         if wantx:
             rect = x0-1, y1-(SCROLLBARWIDTH-1), x1-(SCROLLBARWIDTH-2), y1+1
             self.barx = NewControl(self.wid, rect, "", 1, vx, 0, 32767, 16, 0)
@@ -1007,7 +1007,7 @@ class ScrolledWindow(ControlsWindow):
         SetPort(self.wid)
         vx, vy = self.getscrollbarvalues()
         if self.barx:
-            if vx == None:
+            if vx is None:
                 self.barx.HiliteControl(255)
                 self.barx_enabled = 0
             else:
@@ -1017,7 +1017,7 @@ class ScrolledWindow(ControlsWindow):
                         self.barx.HiliteControl(0)
                 self.barx.SetControlValue(vx)
         if self.bary:
-            if vy == None:
+            if vy is None:
                 self.bary.HiliteControl(255)
                 self.bary_enabled = 0
             else:
diff --git a/Lib/plat-mac/MiniAEFrame.py b/Lib/plat-mac/MiniAEFrame.py
index e2f7cec3391b..16f44d951080 100644
--- a/Lib/plat-mac/MiniAEFrame.py
+++ b/Lib/plat-mac/MiniAEFrame.py
@@ -159,7 +159,7 @@ class AEServer:
             #Same try/except comment as above
             rv = _function(**_parameters)
 
-        if rv == None:
+        if rv is None:
             aetools.packevent(_reply, {})
         else:
             aetools.packevent(_reply, {'----':rv})
diff --git a/Lib/plat-mac/PixMapWrapper.py b/Lib/plat-mac/PixMapWrapper.py
index a4bacaa6b778..98abb4afe29a 100644
--- a/Lib/plat-mac/PixMapWrapper.py
+++ b/Lib/plat-mac/PixMapWrapper.py
@@ -147,9 +147,9 @@ class PixMapWrapper:
         """Draw this pixmap into the given (default current) grafport."""
         src = self.bounds
         dest = [x1,y1,x2,y2]
-        if x2 == None:
+        if x2 is None:
             dest[2] = x1 + src[2]-src[0]
-        if y2 == None:
+        if y2 is None:
             dest[3] = y1 + src[3]-src[1]
         if not port: port = Qd.GetPort()
         Qd.CopyBits(self.PixMap(), port.GetPortBitMapForCopyBits(), src, tuple(dest),
diff --git a/Lib/plat-mac/aepack.py b/Lib/plat-mac/aepack.py
index b0301409dede..c082b1dfe4ff 100644
--- a/Lib/plat-mac/aepack.py
+++ b/Lib/plat-mac/aepack.py
@@ -82,7 +82,7 @@ def pack(x, forcetype = None):
         else:
             return pack(x).AECoerceDesc(forcetype)
 
-    if x == None:
+    if x is None:
         return AE.AECreateDesc(b'null', '')
 
     if isinstance(x, AEDescType):
diff --git a/Lib/plat-mac/buildtools.py b/Lib/plat-mac/buildtools.py
index 154501422333..87a099e2b0bf 100644
--- a/Lib/plat-mac/buildtools.py
+++ b/Lib/plat-mac/buildtools.py
@@ -203,13 +203,13 @@ def process_common(template, progress, code, rsrcname, destname, is_update,
     dummy, tmplowner = copyres(input, output, skiptypes, 1, progress)
 
     Res.CloseResFile(input)
-##  if ownertype == None:
+##  if ownertype is None:
 ##      raise BuildError, "No owner resource found in either resource file or template"
     # Make sure we're manipulating the output resource file now
 
     Res.UseResFile(output)
 
-    if ownertype == None:
+    if ownertype is None:
         # No owner resource in the template. We have skipped the
         # Python owner resource, so we have to add our own. The relevant
         # bundle stuff is already included in the interpret/applet template.
diff --git a/Lib/plat-mac/findertools.py b/Lib/plat-mac/findertools.py
index bebd2a0d7dd6..9bb35e622eaf 100644
--- a/Lib/plat-mac/findertools.py
+++ b/Lib/plat-mac/findertools.py
@@ -124,7 +124,7 @@ def comment(object, comment=None):
     """comment: get or set the Finder-comment of the item, displayed in the 'Get Info' window."""
     object = Carbon.File.FSRef(object)
     object_alias = object.FSNewAliasMonimal()
-    if comment == None:
+    if comment is None:
         return _getcomment(object_alias)
     else:
         return _setcomment(object_alias, comment)
@@ -329,7 +329,7 @@ def label(object, index=None):
     """label: set or get the label of the item. Specify file by name or fsspec."""
     object = Carbon.File.FSRef(object)
     object_alias = object.FSNewAliasMinimal()
-    if index == None:
+    if index is None:
         return _getlabel(object_alias)
     if index < 0 or index > 7:
         index = 0
@@ -375,7 +375,7 @@ def windowview(folder, view=None):
     """
     fsr = Carbon.File.FSRef(folder)
     folder_alias = fsr.FSNewAliasMinimal()
-    if view == None:
+    if view is None:
         return _getwindowview(folder_alias)
     return _setwindowview(folder_alias, view)
 
@@ -535,7 +535,7 @@ def icon(object, icondata=None):
     Development opportunity: get and set the data as PICT."""
     fsr = Carbon.File.FSRef(object)
     object_alias = fsr.FSNewAliasMinimal()
-    if icondata == None:
+    if icondata is None:
         return _geticon(object_alias)
     return _seticon(object_alias, icondata)
 
diff --git a/Lib/plat-mac/gensuitemodule.py b/Lib/plat-mac/gensuitemodule.py
index 9d4df6dd39db..c3b42e48a6a0 100644
--- a/Lib/plat-mac/gensuitemodule.py
+++ b/Lib/plat-mac/gensuitemodule.py
@@ -770,7 +770,7 @@ class SuiteCompiler:
             fp.write("        if _object:\n")
             fp.write("            _arguments['----'] = _object\n")
         else:
-            fp.write("        if _no_object != None: raise TypeError, 'No direct arg expected'\n")
+            fp.write("        if _no_object is not None: raise TypeError, 'No direct arg expected'\n")
         fp.write("\n")
         #
         # Do enum-name substitution
diff --git a/Lib/plat-mac/ic.py b/Lib/plat-mac/ic.py
index 5a377ebcbd20..f4f837052fc7 100644
--- a/Lib/plat-mac/ic.py
+++ b/Lib/plat-mac/ic.py
@@ -198,12 +198,12 @@ class IC:
         self.ic.ICLaunchURL(hint, url, 0, len(url))
 
     def parseurl(self, data, start=None, end=None, hint=""):
-        if start == None:
+        if start is None:
             selStart = 0
             selEnd = len(data)
         else:
             selStart = selEnd = start
-        if end != None:
+        if end is not None:
             selEnd = end
         selStart, selEnd = self.ic.ICParseURL(hint, data, selStart, selEnd, self.h)
         return self.h.data, selStart, selEnd
@@ -227,27 +227,27 @@ _dft_ic = None
 
 def launchurl(url, hint=""):
     global _dft_ic
-    if _dft_ic == None: _dft_ic = IC()
+    if _dft_ic is None: _dft_ic = IC()
     return _dft_ic.launchurl(url, hint)
 
 def parseurl(data, start=None, end=None, hint=""):
     global _dft_ic
-    if _dft_ic == None: _dft_ic = IC()
+    if _dft_ic is None: _dft_ic = IC()
     return _dft_ic.parseurl(data, start, end, hint)
 
 def mapfile(filename):
     global _dft_ic
-    if _dft_ic == None: _dft_ic = IC()
+    if _dft_ic is None: _dft_ic = IC()
     return _dft_ic.mapfile(filename)
 
 def maptypecreator(type, creator, filename=""):
     global _dft_ic
-    if _dft_ic == None: _dft_ic = IC()
+    if _dft_ic is None: _dft_ic = IC()
     return _dft_ic.maptypecreator(type, creator, filename)
 
 def settypecreator(file):
     global _dft_ic
-    if _dft_ic == None: _dft_ic = IC()
+    if _dft_ic is None: _dft_ic = IC()
     return _dft_ic.settypecreator(file)
 
 def _test():
diff --git a/Lib/plat-mac/lib-scriptpackages/CodeWarrior/CodeWarrior_suite.py b/Lib/plat-mac/lib-scriptpackages/CodeWarrior/CodeWarrior_suite.py
index 110693741591..ab1fd6aaaf81 100644
--- a/Lib/plat-mac/lib-scriptpackages/CodeWarrior/CodeWarrior_suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/CodeWarrior/CodeWarrior_suite.py
@@ -51,7 +51,7 @@ class CodeWarrior_suite_Events:
         _subcode = 'MAKE'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -135,7 +135,8 @@ class CodeWarrior_suite_Events:
         _subcode = 'EXPT'
 
         aetools.keysubst(_arguments, self._argmap_export)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _arguments: raise TypeError('No optional args expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -154,7 +155,7 @@ class CodeWarrior_suite_Events:
         _subcode = 'RMOB'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -193,7 +194,7 @@ class CodeWarrior_suite_Events:
         _subcode = 'RUN '
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -232,7 +233,7 @@ class CodeWarrior_suite_Events:
         _subcode = 'UP2D'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/CodeWarrior/Metrowerks_Shell_Suite.py b/Lib/plat-mac/lib-scriptpackages/CodeWarrior/Metrowerks_Shell_Suite.py
index 4a9cc5e7a5b9..48f42fdc51d5 100644
--- a/Lib/plat-mac/lib-scriptpackages/CodeWarrior/Metrowerks_Shell_Suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/CodeWarrior/Metrowerks_Shell_Suite.py
@@ -72,7 +72,7 @@ class Metrowerks_Shell_Suite_Events:
         _subcode = 'ClsP'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -190,7 +190,7 @@ class Metrowerks_Shell_Suite_Events:
         _subcode = 'GDoc'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -217,7 +217,8 @@ class Metrowerks_Shell_Suite_Events:
         _subcode = 'Gref'
 
         aetools.keysubst(_arguments, self._argmap_Get_Preferences)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _arguments: raise TypeError('No optional args expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -263,7 +264,7 @@ class Metrowerks_Shell_Suite_Events:
         _subcode = 'GetP'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -283,7 +284,7 @@ class Metrowerks_Shell_Suite_Events:
         _subcode = 'GSeg'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -324,7 +325,7 @@ class Metrowerks_Shell_Suite_Events:
         _subcode = 'NsCl'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -410,7 +411,8 @@ class Metrowerks_Shell_Suite_Events:
         _subcode = 'Make'
 
         aetools.keysubst(_arguments, self._argmap_Make_Project)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _arguments: raise TypeError('No optional args expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -503,7 +505,7 @@ class Metrowerks_Shell_Suite_Events:
         _subcode = 'RemB'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -543,7 +545,7 @@ class Metrowerks_Shell_Suite_Events:
         _subcode = 'ReFP'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -570,7 +572,8 @@ class Metrowerks_Shell_Suite_Events:
         _subcode = 'RunP'
 
         aetools.keysubst(_arguments, self._argmap_Run_Project)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _arguments: raise TypeError('No optional args expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -682,7 +685,8 @@ class Metrowerks_Shell_Suite_Events:
         _subcode = 'Pref'
 
         aetools.keysubst(_arguments, self._argmap_Set_Preferences)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _arguments: raise TypeError('No optional args expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -778,7 +782,8 @@ class Metrowerks_Shell_Suite_Events:
         _subcode = 'UpdP'
 
         aetools.keysubst(_arguments, self._argmap_Update_Project)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _arguments: raise TypeError('No optional args expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/CodeWarrior/Standard_Suite.py b/Lib/plat-mac/lib-scriptpackages/CodeWarrior/Standard_Suite.py
index 54deabb81072..a0df41e16366 100644
--- a/Lib/plat-mac/lib-scriptpackages/CodeWarrior/Standard_Suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/CodeWarrior/Standard_Suite.py
@@ -115,7 +115,7 @@ class Standard_Suite_Events(Standard_Suite_Events):
         _subcode = 'crel'
 
         aetools.keysubst(_arguments, self._argmap_make)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/Explorer/Required_Suite.py b/Lib/plat-mac/lib-scriptpackages/Explorer/Required_Suite.py
index 7c902fb99f14..cc6ef6f51e4b 100644
--- a/Lib/plat-mac/lib-scriptpackages/Explorer/Required_Suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/Explorer/Required_Suite.py
@@ -61,7 +61,7 @@ class Required_Suite_Events(Required_Suite_Events):
         _subcode = 'quit'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -80,7 +80,7 @@ class Required_Suite_Events(Required_Suite_Events):
         _subcode = 'oapp'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/Explorer/Web_Browser_Suite.py b/Lib/plat-mac/lib-scriptpackages/Explorer/Web_Browser_Suite.py
index 78c58c8ea0f2..a7e4a8cf2660 100644
--- a/Lib/plat-mac/lib-scriptpackages/Explorer/Web_Browser_Suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/Explorer/Web_Browser_Suite.py
@@ -42,7 +42,7 @@ class Web_Browser_Suite_Events:
         _subcode = 'CLSA'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -69,7 +69,8 @@ class Web_Browser_Suite_Events:
         _subcode = 'CLOS'
 
         aetools.keysubst(_arguments, self._argmap_CloseWindow)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _arguments: raise TypeError('No optional args expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -110,7 +111,7 @@ class Web_Browser_Suite_Events:
         _subcode = 'LSTW'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/Finder/Finder_Basics.py b/Lib/plat-mac/lib-scriptpackages/Finder/Finder_Basics.py
index 4afe48a165fd..3433d7a8c76f 100644
--- a/Lib/plat-mac/lib-scriptpackages/Finder/Finder_Basics.py
+++ b/Lib/plat-mac/lib-scriptpackages/Finder/Finder_Basics.py
@@ -20,7 +20,7 @@ class Finder_Basics_Events:
         _subcode = 'copy'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/Finder/Legacy_suite.py b/Lib/plat-mac/lib-scriptpackages/Finder/Legacy_suite.py
index c2eb48aad61d..fc9da2e7f23b 100644
--- a/Lib/plat-mac/lib-scriptpackages/Finder/Legacy_suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/Finder/Legacy_suite.py
@@ -20,7 +20,7 @@ class Legacy_suite_Events:
         _subcode = 'rest'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -39,7 +39,7 @@ class Legacy_suite_Events:
         _subcode = 'shut'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -58,7 +58,7 @@ class Legacy_suite_Events:
         _subcode = 'slep'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/Finder/Standard_Suite.py b/Lib/plat-mac/lib-scriptpackages/Finder/Standard_Suite.py
index ff28486eaa58..ff75edc4b9df 100644
--- a/Lib/plat-mac/lib-scriptpackages/Finder/Standard_Suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/Finder/Standard_Suite.py
@@ -179,7 +179,7 @@ class Standard_Suite_Events(Standard_Suite_Events):
         _subcode = 'crel'
 
         aetools.keysubst(_arguments, self._argmap_make)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -285,7 +285,7 @@ class Standard_Suite_Events(Standard_Suite_Events):
         _subcode = 'quit'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/Netscape/Mozilla_suite.py b/Lib/plat-mac/lib-scriptpackages/Netscape/Mozilla_suite.py
index 21a28d8b770e..89cb37f3fc28 100644
--- a/Lib/plat-mac/lib-scriptpackages/Netscape/Mozilla_suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/Netscape/Mozilla_suite.py
@@ -21,7 +21,7 @@ class Mozilla_suite_Events:
         _subcode = 'Impt'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -41,7 +41,7 @@ class Mozilla_suite_Events:
         _subcode = 'upro'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -61,7 +61,7 @@ class Mozilla_suite_Events:
         _subcode = 'wurl'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -126,7 +126,7 @@ class Mozilla_suite_Events:
         _subcode = 'addr'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -165,7 +165,7 @@ class Mozilla_suite_Events:
         _subcode = 'prfl'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/Netscape/PowerPlant.py b/Lib/plat-mac/lib-scriptpackages/Netscape/PowerPlant.py
index a0c84b20fdc7..a5dd2282b603 100644
--- a/Lib/plat-mac/lib-scriptpackages/Netscape/PowerPlant.py
+++ b/Lib/plat-mac/lib-scriptpackages/Netscape/PowerPlant.py
@@ -25,7 +25,7 @@ class PowerPlant_Events:
         _subcode = 'sttg'
 
         aetools.keysubst(_arguments, self._argmap_SwitchTellTarget)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/Netscape/Required_suite.py b/Lib/plat-mac/lib-scriptpackages/Netscape/Required_suite.py
index 8767ac367fc6..a7d3e9629ab3 100644
--- a/Lib/plat-mac/lib-scriptpackages/Netscape/Required_suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/Netscape/Required_suite.py
@@ -61,7 +61,7 @@ class Required_suite_Events(Required_Suite_Events):
         _subcode = 'quit'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -80,7 +80,7 @@ class Required_suite_Events(Required_Suite_Events):
         _subcode = 'oapp'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/Netscape/WorldWideWeb_suite.py b/Lib/plat-mac/lib-scriptpackages/Netscape/WorldWideWeb_suite.py
index 2bfa2a589be8..24a89e7133da 100644
--- a/Lib/plat-mac/lib-scriptpackages/Netscape/WorldWideWeb_suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/Netscape/WorldWideWeb_suite.py
@@ -154,7 +154,7 @@ class WorldWideWeb_suite_Events:
         _subcode = 'LSTW'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/StdSuites/AppleScript_Suite.py b/Lib/plat-mac/lib-scriptpackages/StdSuites/AppleScript_Suite.py
index 5e710b90ef4a..e5acd48c0eb6 100644
--- a/Lib/plat-mac/lib-scriptpackages/StdSuites/AppleScript_Suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/StdSuites/AppleScript_Suite.py
@@ -268,7 +268,7 @@ class AppleScript_Suite_Events:
         _subcode = 'actv'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -371,7 +371,7 @@ class AppleScript_Suite_Events:
         _subcode = 'tend'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -443,7 +443,7 @@ class AppleScript_Suite_Events:
         _subcode = 'idle'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -462,7 +462,7 @@ class AppleScript_Suite_Events:
         _subcode = 'noop'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -585,7 +585,7 @@ class AppleScript_Suite_Events:
         _subcode = 'log1'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -625,7 +625,8 @@ class AppleScript_Suite_Events:
         _subcode = 'log0'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
+
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -644,7 +645,7 @@ class AppleScript_Suite_Events:
         _subcode = 'tell'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/StdSuites/Standard_Suite.py b/Lib/plat-mac/lib-scriptpackages/StdSuites/Standard_Suite.py
index 187ea50c2241..e30566809e7f 100644
--- a/Lib/plat-mac/lib-scriptpackages/StdSuites/Standard_Suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/StdSuites/Standard_Suite.py
@@ -255,7 +255,7 @@ class Standard_Suite_Events(builtin_Suite_Events):
         _subcode = 'crel'
 
         aetools.keysubst(_arguments, self._argmap_make)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -345,7 +345,7 @@ class Standard_Suite_Events(builtin_Suite_Events):
         _subcode = 'quit'
 
         aetools.keysubst(_arguments, self._argmap_quit)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
         aetools.enumsubst(_arguments, 'savo', _Enum_savo)
 
@@ -365,7 +365,7 @@ class Standard_Suite_Events(builtin_Suite_Events):
         _subcode = 'rapp'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -384,7 +384,7 @@ class Standard_Suite_Events(builtin_Suite_Events):
         _subcode = 'oapp'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/SystemEvents/Standard_Suite.py b/Lib/plat-mac/lib-scriptpackages/SystemEvents/Standard_Suite.py
index 5778288bb927..a0cd3dab63ad 100644
--- a/Lib/plat-mac/lib-scriptpackages/SystemEvents/Standard_Suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/SystemEvents/Standard_Suite.py
@@ -175,7 +175,7 @@ class Standard_Suite_Events:
         _subcode = 'crel'
 
         aetools.keysubst(_arguments, self._argmap_make)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/Terminal/Standard_Suite.py b/Lib/plat-mac/lib-scriptpackages/Terminal/Standard_Suite.py
index 61a27a824e49..0020e5245943 100644
--- a/Lib/plat-mac/lib-scriptpackages/Terminal/Standard_Suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/Terminal/Standard_Suite.py
@@ -175,7 +175,7 @@ class Standard_Suite_Events:
         _subcode = 'crel'
 
         aetools.keysubst(_arguments, self._argmap_make)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Lib/plat-mac/lib-scriptpackages/_builtinSuites/builtin_Suite.py b/Lib/plat-mac/lib-scriptpackages/_builtinSuites/builtin_Suite.py
index 7d5abbd3542e..a5ee8c605347 100644
--- a/Lib/plat-mac/lib-scriptpackages/_builtinSuites/builtin_Suite.py
+++ b/Lib/plat-mac/lib-scriptpackages/_builtinSuites/builtin_Suite.py
@@ -37,8 +37,7 @@ class builtin_Suite_Events:
         _subcode = 'oapp'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
-
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
                         _arguments, _attributes)
@@ -56,7 +55,7 @@ class builtin_Suite_Events:
         _subcode = 'rapp'
 
         if _arguments: raise TypeError('No optional args expected')
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -100,7 +99,7 @@ class builtin_Suite_Events:
         _subcode = 'quit'
 
         aetools.keysubst(_arguments, self._argmap_quit)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
         aetools.enumsubst(_arguments, 'savo', _Enum_savo)
 
diff --git a/Lib/plat-mac/macostools.py b/Lib/plat-mac/macostools.py
index 80c372774b97..3d5b6f82419c 100644
--- a/Lib/plat-mac/macostools.py
+++ b/Lib/plat-mac/macostools.py
@@ -106,7 +106,7 @@ def copy(src, dst, createpath=0, copydates=1, forcetype=None):
     sf = srcfss.FSpGetFInfo()
     df = dstfss.FSpGetFInfo()
     df.Creator, df.Type = sf.Creator, sf.Type
-    if forcetype != None:
+    if forcetype is not None:
         df.Type = forcetype
     df.Flags = (sf.Flags & COPY_FLAGS)
     dstfss.FSpSetFInfo(df)
diff --git a/Lib/plat-mac/videoreader.py b/Lib/plat-mac/videoreader.py
index 42954b7028cf..50f9299ac2e3 100644
--- a/Lib/plat-mac/videoreader.py
+++ b/Lib/plat-mac/videoreader.py
@@ -188,7 +188,7 @@ class _Reader:
 
     def GetVideoFrameRate(self):
         tv = self.videocurtime
-        if tv == None:
+        if tv is None:
             tv = 0
         flags = QuickTime.nextTimeStep|QuickTime.nextTimeEdgeOK
         tv, dur = self.videomedia.GetMediaNextInterestingTime(flags, tv, 1.0)
@@ -199,7 +199,7 @@ class _Reader:
         if not time is None:
             self.audiocurtime = time
         flags = QuickTime.nextTimeStep|QuickTime.nextTimeEdgeOK
-        if self.audiocurtime == None:
+        if self.audiocurtime is None:
             self.audiocurtime = 0
         tv = self.audiomedia.GetMediaNextInterestingTimeOnly(flags, self.audiocurtime, 1.0)
         if tv < 0 or (self.audiocurtime and tv < self.audiocurtime):
@@ -215,7 +215,7 @@ class _Reader:
         if not time is None:
             self.videocurtime = time
         flags = QuickTime.nextTimeStep
-        if self.videocurtime == None:
+        if self.videocurtime is None:
             flags = flags | QuickTime.nextTimeEdgeOK
             self.videocurtime = 0
         tv = self.videomedia.GetMediaNextInterestingTimeOnly(flags, self.videocurtime, 1.0)
diff --git a/Lib/plat-os2emx/grp.py b/Lib/plat-os2emx/grp.py
index 8ac9b15b46f9..ee63ef8ae201 100644
--- a/Lib/plat-os2emx/grp.py
+++ b/Lib/plat-os2emx/grp.py
@@ -143,7 +143,7 @@ def __read_group_file():
     while 1:
         entry = group.readline().strip()
         if len(entry) > 3:
-            if sep == None:
+            if sep is None:
                 sep = __get_field_sep(entry)
             fields = entry.split(sep)
             fields[2] = int(fields[2])
diff --git a/Lib/plat-os2emx/pwd.py b/Lib/plat-os2emx/pwd.py
index e1739bdd0726..2cb077f5abef 100644
--- a/Lib/plat-os2emx/pwd.py
+++ b/Lib/plat-os2emx/pwd.py
@@ -167,7 +167,7 @@ def __read_passwd_file():
     while True:
         entry = passwd.readline().strip()
         if len(entry) > 6:
-            if sep == None:
+            if sep is None:
                 sep = __get_field_sep(entry)
             fields = entry.split(sep)
             for i in (2, 3):
diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py
index 68e5c88efa89..cd69ce1de723 100644
--- a/Lib/test/test_ast.py
+++ b/Lib/test/test_ast.py
@@ -124,7 +124,7 @@ if __name__=='__main__' and sys.argv[1:] == ['-g']:
 
 def test_order(ast_node, parent_pos):
 
-    if not isinstance(ast_node, _ast.AST) or ast_node._fields == None:
+    if not isinstance(ast_node, _ast.AST) or ast_node._fields is None:
         return
     if isinstance(ast_node, (_ast.expr, _ast.stmt, _ast.excepthandler)):
         node_pos = (ast_node.lineno, ast_node.col_offset)
@@ -135,7 +135,7 @@ def test_order(ast_node, parent_pos):
         if isinstance(value, list):
             for child in value:
                 test_order(child, parent_pos)
-        elif value != None:
+        elif value is not None:
             test_order(value, parent_pos)
 
 def run_tests():
diff --git a/Lib/test/test_logging.py b/Lib/test/test_logging.py
index ee9e392c67bc..6f5af1573ef8 100644
--- a/Lib/test/test_logging.py
+++ b/Lib/test/test_logging.py
@@ -450,6 +450,7 @@ class MemoryHandlerTest(BaseTest):
 
     def tearDown(self):
         self.mem_hdlr.close()
+        BaseTest.tearDown(self)
 
     def test_flush(self):
         # The memory handler flushes to its target handler based on specific
diff --git a/Lib/test/test_mailbox.py b/Lib/test/test_mailbox.py
index ca87229573b0..bc77621088e8 100644
--- a/Lib/test/test_mailbox.py
+++ b/Lib/test/test_mailbox.py
@@ -626,9 +626,9 @@ class TestMaildir(TestMailbox):
                                                                 "tmp")),
                              "File in wrong location: '%s'" % head)
             match = pattern.match(tail)
-            self.assert_(match != None, "Invalid file name: '%s'" % tail)
+            self.assert_(match is not None, "Invalid file name: '%s'" % tail)
             groups = match.groups()
-            if previous_groups != None:
+            if previous_groups is not None:
                 self.assert_(int(groups[0] >= previous_groups[0]),
                              "Non-monotonic seconds: '%s' before '%s'" %
                              (previous_groups[0], groups[0]))
diff --git a/Lib/test/test_pyclbr.py b/Lib/test/test_pyclbr.py
index c96ae6d046d8..25c7d8503a14 100644
--- a/Lib/test/test_pyclbr.py
+++ b/Lib/test/test_pyclbr.py
@@ -55,7 +55,7 @@ class PyclbrTest(TestCase):
 
         ignore = set(ignore) | set(['object'])
 
-        if module == None:
+        if module is None:
             # Import it.
             # ('<silly>' is to work around an API silliness in __import__)
             module = __import__(moduleName, globals(), {}, ['<silly>'])
diff --git a/Lib/test/test_ssl.py b/Lib/test/test_ssl.py
index 4e9bfb36b15b..0bd43920d184 100644
--- a/Lib/test/test_ssl.py
+++ b/Lib/test/test_ssl.py
@@ -670,7 +670,7 @@ else:
                           expectedToWork,
                           certsreqs=None):
 
-        if certsreqs == None:
+        if certsreqs is None:
             certsreqs = ssl.CERT_NONE
 
         if certsreqs == ssl.CERT_NONE:
diff --git a/Lib/xml/sax/expatreader.py b/Lib/xml/sax/expatreader.py
index c4fb93040db8..26b05c3736d8 100644
--- a/Lib/xml/sax/expatreader.py
+++ b/Lib/xml/sax/expatreader.py
@@ -107,7 +107,7 @@ class ExpatParser(xmlreader.IncrementalParser, xmlreader.Locator):
         xmlreader.IncrementalParser.parse(self, source)
 
     def prepareParser(self, source):
-        if source.getSystemId() != None:
+        if source.getSystemId() is not None:
             self._parser.SetBase(source.getSystemId())
 
     # Redefined setContentHandler to allow changing handlers during parsing
diff --git a/Mac/BuildScript/build-installer.py b/Mac/BuildScript/build-installer.py
index 0b62ea601627..6cf9c2117731 100755
--- a/Mac/BuildScript/build-installer.py
+++ b/Mac/BuildScript/build-installer.py
@@ -289,7 +289,7 @@ def runCommand(commandline):
     fd = os.popen(commandline, 'r')
     data = fd.read()
     xit = fd.close()
-    if xit != None:
+    if xit is not None:
         sys.stdout.write(data)
         raise RuntimeError("command failed: %s"%(commandline,))
 
@@ -300,7 +300,7 @@ def captureCommand(commandline):
     fd = os.popen(commandline, 'r')
     data = fd.read()
     xit = fd.close()
-    if xit != None:
+    if xit is not None:
         sys.stdout.write(data)
         raise RuntimeError("command failed: %s"%(commandline,))
 
diff --git a/Mac/Demo/applescript/Disk_Copy/Utility_Events.py b/Mac/Demo/applescript/Disk_Copy/Utility_Events.py
index 03df9387a36f..92133452c3d5 100644
--- a/Mac/Demo/applescript/Disk_Copy/Utility_Events.py
+++ b/Mac/Demo/applescript/Disk_Copy/Utility_Events.py
@@ -26,7 +26,7 @@ class Utility_Events_Events:
         _subcode = 'SEL1'
 
         aetools.keysubst(_arguments, self._argmap_select_disk_image)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')y
 
         aetools.enumsubst(_arguments, 'SELp', _Enum_TEXT)
 
@@ -52,8 +52,7 @@ class Utility_Events_Events:
         _subcode = 'SEL2'
 
         aetools.keysubst(_arguments, self._argmap_select_DiskScript)
-        if _no_object != None: raise TypeError('No direct arg expected')
-
+        if _no_object is not None: raise TypeError('No direct arg expected')
         aetools.enumsubst(_arguments, 'SELp', _Enum_TEXT)
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
@@ -78,7 +77,7 @@ class Utility_Events_Events:
         _subcode = 'SEL3'
 
         aetools.keysubst(_arguments, self._argmap_select_disk_image_or_DiskScript)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
         aetools.enumsubst(_arguments, 'SELp', _Enum_TEXT)
 
@@ -104,7 +103,7 @@ class Utility_Events_Events:
         _subcode = 'SEL4'
 
         aetools.keysubst(_arguments, self._argmap_select_floppy_disk_image)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
         aetools.enumsubst(_arguments, 'SELp', _Enum_TEXT)
 
@@ -130,7 +129,7 @@ class Utility_Events_Events:
         _subcode = 'SEL5'
 
         aetools.keysubst(_arguments, self._argmap_select_disk)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
         aetools.enumsubst(_arguments, 'SELp', _Enum_TEXT)
 
@@ -156,7 +155,7 @@ class Utility_Events_Events:
         _subcode = 'SEL6'
 
         aetools.keysubst(_arguments, self._argmap_select_folder)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
         aetools.enumsubst(_arguments, 'SELp', _Enum_TEXT)
 
diff --git a/Mac/Tools/Doc/HelpIndexingTool/Standard_Suite.py b/Mac/Tools/Doc/HelpIndexingTool/Standard_Suite.py
index 140e8b98fd26..7f0b63a3bb8a 100644
--- a/Mac/Tools/Doc/HelpIndexingTool/Standard_Suite.py
+++ b/Mac/Tools/Doc/HelpIndexingTool/Standard_Suite.py
@@ -103,7 +103,7 @@ class Standard_Suite_Events(Standard_Suite_Events):
         _subcode = 'crel'
 
         aetools.keysubst(_arguments, self._argmap_make)
-        if _no_object != None: raise TypeError('No direct arg expected')
+        if _no_object is not None: raise TypeError('No direct arg expected')
 
 
         _reply, _arguments, _attributes = self.send(_code, _subcode,
diff --git a/Mac/Tools/Doc/setup.py b/Mac/Tools/Doc/setup.py
index e1d8fb189132..b020b405f9fa 100644
--- a/Mac/Tools/Doc/setup.py
+++ b/Mac/Tools/Doc/setup.py
@@ -174,10 +174,10 @@ class AHVDocInstall(Command):
                 ('root', 'root'))
 #               import pdb ; pdb.set_trace()
         build_cmd = self.get_finalized_command('build')
-        if self.build_dest == None:
+        if self.build_dest is None:
             build_cmd = self.get_finalized_command('build')
             self.build_dest = build_cmd.build_dest
-        if self.install_doc == None:
+        if self.install_doc is None:
             self.install_doc = os.path.join(self.prefix, DESTDIR)
         print('INSTALL', self.build_dest, '->', self.install_doc)
 
diff --git a/Mac/scripts/buildpkg.py b/Mac/scripts/buildpkg.py
index ad0afe46c545..c5925881e068 100644
--- a/Mac/scripts/buildpkg.py
+++ b/Mac/scripts/buildpkg.py
@@ -183,7 +183,7 @@ class PackageMaker:
 
         # set folder attributes
         self.sourceFolder = root
-        if resources == None:
+        if resources is None:
             self.resourceFolder = root
         else:
             self.resourceFolder = resources
diff --git a/README b/README
index ecc0bea559e8..41e8a8d96030 100644
--- a/README
+++ b/README
@@ -37,6 +37,14 @@ Documentation for Python 3000 is online, updated twice a day:
 
     http://docs.python.org/dev/3.0/
 
+All documentation is also available online at the Python web site
+(http://docs.python.org/, see below).  It is available online for occasional
+reference, or can be downloaded in many formats for faster access.  The
+documentation is downloadable in HTML, PostScript, PDF, LaTeX (through 2.5), and
+reStructuredText (2.6+) formats; the LaTeX and reStructuredText versions are
+primarily for documentation authors, translators, and people with special
+formatting requirements.
+
 This is a work in progress; please help improve it!
 
 The design documents for Python 3000 are also online.  While the
@@ -77,6 +85,12 @@ For a more detailed change log, read Misc/NEWS (though this file, too,
 is incomplete, and also doesn't list anything merged in from the 2.6
 release under development).
 
+Proposals for enhancement
+------------------------------
+
+If you have a proposal to change Python, it's best to submit a Python
+Enhancement Proposal (PEP) first.  All current PEPs, as well as guidelines for
+submitting a new PEP, are listed at http://www.python.org/dev/peps/.
 
 Converting From Python 2.x to 3.0
 ---------------------------------
diff --git a/Tools/bgen/bgen/bgenGenerator.py b/Tools/bgen/bgen/bgenGenerator.py
index f554fe21604a..d55b4a4bb160 100644
--- a/Tools/bgen/bgen/bgenGenerator.py
+++ b/Tools/bgen/bgen/bgenGenerator.py
@@ -148,7 +148,7 @@ class FunctionGenerator(BaseFunctionGenerator):
         for arg in self.argumentList:
             if arg.flags == ErrorMode or arg.flags == SelfMode:
                 continue
-            if arg.type == None:
+            if arg.type is None:
                 str = 'void'
             else:
                 if hasattr(arg.type, 'typeName'):