From 1ff31108b0f2ab1708bbf5b7e2a4ce14bb6644a3 2014-06-25 16:10:59
From: Gordon Ball <gordon@chronitis.net>
Date: 2014-06-25 16:10:59
Subject: [PATCH] Add an extended range abbreviation including a step value

---

diff --git a/IPython/html/widgets/interaction.py b/IPython/html/widgets/interaction.py
index 6378682..4bb7cbc 100644
--- a/IPython/html/widgets/interaction.py
+++ b/IPython/html/widgets/interaction.py
@@ -23,7 +23,7 @@ from inspect import getcallargs
 from IPython.core.getipython import get_ipython
 from IPython.html.widgets import (Widget, TextWidget,
     FloatSliderWidget, IntSliderWidget, CheckboxWidget, DropdownWidget,
-    ContainerWidget, DOMWidget, IntRangeSliderWidget)
+    ContainerWidget, DOMWidget, IntRangeSliderWidget, FloatRangeSliderWidget)
 from IPython.display import display, clear_output
 from IPython.utils.py3compat import string_types, unicode_type
 from IPython.utils.traitlets import HasTraits, Any, Unicode
@@ -116,6 +116,17 @@ def _widget_abbrev(o):
             else:
                 cls = FloatRangeSliderWidget
             return cls(value=(low, high), min=min, max=max)
+        elif _matches(o, [float_or_int]*5):
+            min, low, high, max, step = o
+            if not min <= low <= high <= max:
+                raise ValueError("Range input expects min <= low <= high <= max, got %r" % o)
+            if step <= 0:
+                raise ValueError("step must be >= 0, not %r" % step)
+            if all(isinstance(_, int) for _ in o):
+                cls = IntRangeSliderWidget
+            else:
+                cls = FloatRangeSliderWidget
+            return cls(value=(low, high), min=min, max=max, step=step)
     else:
         return _widget_abbrev_single_value(o)