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

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

  NIL => NULL
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  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
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  r62035 | raymond.hettinger | 2008-03-29 05:42:07 -0500 (Sat, 29 Mar 2008) | 1 line

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

  Fix capitalization.
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  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.
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  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
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  r62044 | gerhard.haering | 2008-03-29 14:11:52 -0500 (Sat, 29 Mar 2008) | 2 lines

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

  Updated README regarding doc formats
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  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.
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diff --git a/Demo/rpc/nfsclient.py b/Demo/rpc/nfsclient.py
index aad8cf3..c36e3d2 100644
--- a/Demo/rpc/nfsclient.py
+++ b/Demo/rpc/nfsclient.py
@@ -129,7 +129,7 @@
         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 @@
             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 @@
     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)