Slplited python compat file for python 2.x and 3.x

tests/util/py2xfunctions.py

@@ -0,0 +1,18 @@
+def b(s):
+    return s
+
+def l(n):
+    return long(n)
+
+def unicode_(s):
+    if type(s) == str:
+        import codecs
+        c = codecs.lookup('utf-8')
+        s2 = c.decode(s, 'ignore')
+        return s2[0]
+    return u'%s' % s
+
+unicode = unicode
+unichr = unichr
+long = long
+buffer = buffer