rename execute.py to engine.py
diff --git a/xos/tosca/execute.py b/xos/tosca/engine.py
similarity index 100%
rename from xos/tosca/execute.py
rename to xos/tosca/engine.py
diff --git a/xos/tosca/run.py b/xos/tosca/run.py
index 492b12a..aa284e0 100644
--- a/xos/tosca/run.py
+++ b/xos/tosca/run.py
@@ -12,7 +12,7 @@
 django.setup()
 
 from core.models import User
-from tosca.execute import XOSTosca
+from tosca.engine import XOSTosca
 
 def main():
     if len(sys.argv)<3: