Make uniquelist work both as module and a script

src/sas/sascalc/data_util/uniquelist.py

@@ -1,5 +1,11 @@
 #
 
+try:
+    from __builtin__ import hash as builtin_hash
+except ImportError:
+    from builtins import hash as builtin_hash
+
+
 def uniquelist(inputlist, hash=None): 
     '''remove redunduant elements from the give list
     and return a list of unique elements.
@@ -11,7 +17,7 @@ def uniquelist(inputlist, hash=None):
         This function is order-preserving.
     '''
     if hash is None:
-        hash = __builtins__.hash
+        hash = builtin_hash
     seen = {}
     result = []
     for item in inputlist: