Evaluation optimizations.

[python-bulletml.git] / bulletml / expr.py

diff --git a/bulletml/expr.py b/bulletml/expr.py
index 9ca82ec..33f7d44 100644 (file)
--- a/bulletml/expr.py
+++ b/bulletml/expr.py
@@ -57,7 +57,7 @@ class NumberDef(object):
         if self.__value is not None:
             return self.__value
         rand = random.random()
-        variables = dict(rand=rand, rank=rank, params=params)
+        variables = { 'rand': rand, 'rank': rank, 'params': params }
         return eval(self.__expr, variables)
 
     def __repr__(self):