diff -r ad56dff3602f Tools/unicode/mkstringprep.py
--- a/Tools/unicode/mkstringprep.py	Tue May 28 16:27:08 2013 +0300
+++ b/Tools/unicode/mkstringprep.py	Tue May 28 20:40:16 2013 +0300
@@ -1,4 +1,5 @@
-import re, unicodedata, sys
+import re, sys
+from unicodedata import ucd_3_2_0 as unicodedata
 
 if sys.maxunicode == 65535:
     raise RuntimeError("need UCS-4 Python")
@@ -37,7 +38,10 @@
         tuple.append((prev,prev+span+1))
     else:
         single.append(prev)
-    tuple = " + ".join(["list(range(%d,%d))" % t for t in tuple])
+    if not single and len(tuple) == 1:
+        tuple = "range(%d,%d)" % tuple[0]
+    else:
+        tuple = " + ".join("list(range(%d,%d))" % t for t in tuple)
     if not single:
         return "set(%s)" % tuple
     if not tuple:
@@ -113,7 +117,7 @@
 and mappings, for which a mapping function is provided.
 \"\"\"
 
-import unicodedata
+from unicodedata import ucd_3_2_0 as unicodedata
 """)
 
 print("assert unicodedata.unidata_version == %s" % repr(unicodedata.unidata_version))
@@ -173,15 +177,15 @@
 b3_exceptions = {}
 
 for k,v in table_b2.items():
-    if map(ord, unichr(k).lower()) != v:
-        b3_exceptions[k] = u"".join(map(unichr,v))
+    if list(map(ord, chr(k).lower())) != v:
+        b3_exceptions[k] = "".join(map(chr,v))
 
 b3 = sorted(b3_exceptions.items())
 
 print("""
 b3_exceptions = {""")
-for i,(k,v) in enumerate(b3):
-    print("0x%x:%s," % (k, repr(v)), end=' ')
+for i, kv in enumerate(b3):
+    print("0x%x:%a," % kv, end=' ')
     if i % 4 == 3:
         print()
 print("}")
@@ -224,7 +228,7 @@
 def map_table_b2(a):
     al = map_table_b3(a)
     b = unicodedata.normalize("NFKC", al)
-    bl = u"".join([map_table_b3(ch) for ch in b])
+    bl = "".join([map_table_b3(ch) for ch in b])
     c = unicodedata.normalize("NFKC", bl)
     if b != c:
         return c
@@ -240,7 +244,7 @@
 
 print("""
 def in_table_c11(code):
-    return code == u" "
+    return code == " "
 """)
 
 # C.1.2 is the rest of all space characters
@@ -254,7 +258,7 @@
 
 print("""
 def in_table_c12(code):
-    return unicodedata.category(code) == "Zs" and code != u" "
+    return unicodedata.category(code) == "Zs" and code != " "
 
 def in_table_c11_c12(code):
     return unicodedata.category(code) == "Zs"