language/environment: only call prepare automatically if it exists

2016-09-09 09:06:59 +08:00 · 2016-09-09 09:06:59 +08:00 · 6aaf6c8789
parent 7efd990541
commit 6aaf6c8789
1 changed files with 3 additions and 2 deletions
--- a/artiq/language/environment.py
+++ b/artiq/language/environment.py
@ -380,9 +380,10 @@ class EnvExperiment(Experiment, HasEnvironment):
    Most experiment should derive from this class."""
    def prepare(self):
        """The default prepare method calls prepare for all children, in the
-        order of instantiation."""
+        order of instantiation, if the child has a prepare method."""
        for child in self.children:
-            child.prepare()
+            if hasattr(child, "prepare"):
+                child.prepare()


 def is_experiment(o):