Demonstrate issue 3793.

Author: rpgoldman

pymc3/tests/test_data_container.py

@@ -143,3 +143,12 @@ def test_model_to_graphviz_for_model_with_data_container(self):
         assert text in g.source
         text = 'obs [label="obs ~ Normal" style=filled]'
         assert text in g.source
+
+# this is a test for issue 3793 -- `Data` objects in named models are 
+# not given model-relative names.
+def test_data_naming():
+    with pm.Model("named_model") as model:
+        x = pm.Data("x", [1.0, 2.0, 3.0])
+        y = pm.Normal("y")
+    assert y.name == "named_model_y"
+    assert x.name == "named_model_x"