bug #3662: SoundEx works only for ascii characters

svn: r14700

src/soundex.py

@@ -28,6 +28,7 @@ Provide soundex calculation
 #
 #-------------------------------------------------------------------------
 import string
+import unicodedata
 
 #-------------------------------------------------------------------------
 #
@@ -46,7 +47,8 @@ TABLE  = string.maketrans('ABCDEFGIJKLMNOPQRSTUVXYZ',
 def soundex(strval):
     "Return the soundex value to a string argument."
 
-    strval = strval.upper().strip()
+    strval = unicodedata.normalize('NFKD', 
+                    strval.upper().strip()).encode('ASCII', 'ignore')
     if not strval:
         return "Z000"
     strval = strval.encode('iso-8859-1')