Update the code to better reflect recommended style:

Use != instead of <> since <> is documented as "obsolescent".
Use "is" and "is not" when comparing with None or type objects.

Lib/filecmp.py

@@ -199,7 +199,7 @@ class dircmp:
             if ok:
                 a_type = stat.S_IFMT(a_stat[stat.ST_MODE])
                 b_type = stat.S_IFMT(b_stat[stat.ST_MODE])
-                if a_type <> b_type:
+                if a_type != b_type:
                     self.common_funny.append(x)
                 elif stat.S_ISDIR(a_type):
                     self.common_dirs.append(x)
@@ -317,7 +317,8 @@ def demo():
     import sys
     import getopt
     options, args = getopt.getopt(sys.argv[1:], 'r')
-    if len(args) <> 2: raise getopt.error, 'need exactly two args'
+    if len(args) != 2:
+        raise getopt.error, 'need exactly two args'
     dd = dircmp(args[0], args[1])
     if ('-r', '') in options:
         dd.report_full_closure()