Deprecate using function annotations to specify interactive controls.

Fixes #1264.
jupyter-widgets · Apr 17, 2017 · 26358e5 · 26358e5
1 parent 69ae4b1
commit 26358e5
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/ipywidgets/widgets/interaction.py b/ipywidgets/widgets/interaction.py
@@ -102,6 +102,7 @@ def _yield_abbreviations_for_parameter(param, kwargs):
         if name in kwargs:
             value = kwargs.pop(name)
         elif ann is not empty:
+            warn("Using function annotations to implicitly specify interactive controls is deprecated. Use an explicit keyword argument for the parameter instead.", DeprecationWarning)
             value = ann
         elif default is not empty:
             value = default