Move code in __name__ == '__main__' block into main() function, rewrite code so

there's no need to subclass OptionParser.

Lib/profile.py

@@ -583,31 +583,29 @@ class Profile:
 def Stats(*args):
     print 'Report generating functions are in the "pstats" module\a'
 
-
-# When invoked as main program, invoke the profiler on a script
-if __name__ == '__main__':
+def main():
     usage = "profile.py [-o output_file_path] [-s sort] scriptfile [arg] ..."
-    if not sys.argv[1:]:
-        print "Usage: ", usage
-        sys.exit(2)
-
-    class ProfileParser(OptionParser):
-        def __init__(self, usage):
-            OptionParser.__init__(self)
-            self.usage = usage
-
-    parser = ProfileParser(usage)
+    parser = OptionParser(usage=usage)
     parser.allow_interspersed_args = False
     parser.add_option('-o', '--outfile', dest="outfile",
         help="Save stats to <outfile>", default=None)
     parser.add_option('-s', '--sort', dest="sort",
         help="Sort order when printing to stdout, based on pstats.Stats class", default=-1)
-
+    
+    if not sys.argv[1:]:
+        parser.print_usage()
+        sys.exit(2)
+    
     (options, args) = parser.parse_args()
     sys.argv[:] = args
-
+    
     if (len(sys.argv) > 0):
         sys.path.insert(0, os.path.dirname(sys.argv[0]))
         run('execfile(%r)' % (sys.argv[0],), options.outfile, options.sort)
     else:
-        print "Usage: ", usage
+        parser.print_usage()
+    return parser
+
+# When invoked as main program, invoke the profiler on a script
+if __name__ == '__main__':
+    main()