Added 'translate_longopt()' function.

fancy_getopt.py

@@ -472,6 +472,13 @@ def wrap_text (text, width):
 # wrap_text ()
 
 
+def translate_longopt (opt):
+    """Convert a long option name to a valid Python identifier by
+    changing "-" to "_".
+    """
+    return string.translate(opt, longopt_xlate)
+        
+
 class OptionDummy:
     """Dummy class just used as a place to hold command-line option
     values as instance attributes."""