Changeset 1968

Timestamp:

Dec 6, 2009 5:02:14 PM (11 years ago)

Author:

wehart

Message:

Bug fix when an expression has no arguments.

File:

• coopr.pyomo/trunk/coopr/pyomo/base/expr.py (modified) (1 diff)

coopr.pyomo/trunk/coopr/pyomo/base/expr.py

@@ -85 +85 @@
     #
     def is_constant(self):
+        if self._args is None:
+            return True
         for arg in self._args:
             if not arg.is_constant():