MIN Explicit check against iterating Task

This is a possible cause of user error.
luispedro · Feb 22, 2017 · 83eb07f · 83eb07f
1 parent 7ffbaea
commit 83eb07f
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/jug/task.py b/jug/task.py
@@ -50,6 +50,14 @@ class TaskletMixin(object):
     def __getitem__(self, slice):
         return Tasklet(self, _getitem(slice))
 
+    def __iter__(self):
+        raise NotImplementedError("""\
+You cannot iterate over Task results.
+
+If the Task returns an iterator of a fixed size, `iteratetask` may fit your usage:
+
+http://jug.readthedocs.io/en/latest/api.html?highlight=iteratetask#jug.iteratetask""")
+
 class Task(TaskletMixin):
     '''
     T = Task(f, dep0, dep1,..., kw_arg0=kw_val0, kw_arg1=kw_val1, ...)