Add NumericFacet.reset that clears the range (from, to)

google/refine/facet.py

@@ -115,7 +115,7 @@ class NumericFacet(Facet):
             column,
             From=From,
             to=to,
-            expression=expression,         
+            expression=expression,
             type='range',
             select_blank=select_blank,
             select_error=select_error,
@@ -123,6 +123,11 @@ class NumericFacet(Facet):
             select_numeric=select_numeric,
             **options)
 
+    def reset(self):
+        self.From = None
+        self.to = None
+        return self
+
 
 class FacetResponse(object):
     def __init__(self, facet):

google/test/test_tutorial.py

@@ -421,6 +421,18 @@ class TutorialTestWebScraping(refinetest.RefineTestCase):
         self.assertEqual(len(rows), 2)
         self.assertEqual(rows[-1]['top'], 567)
         self.project.engine.remove_all()
+        # {5} - tutorial says 'line'; it means 'top'
+        line_facet = facet.NumericFacet('top')
+        line_facet.to = 100
+        self.project.remove_rows(line_facet)
+        self.assertInResponse('Remove 775 rows')
+        line_facet.From = 570
+        line_facet.to = 600
+        self.project.remove_rows(line_facet)
+        self.assertInResponse('Remove 71 rows')
+        line_facet.reset()
+        response = self.project.get_rows()
+        self.assertEqual(response.filtered, 4563)
 
 
 if __name__ == '__main__':