Unalikeability Revisions (#341)

* revised unalikeability functionality

* added test cases for revised unalikeability functionality

* update to 0.6.1

dataprofiler/profilers/categorical_column_profile.py

@@ -260,6 +260,8 @@ def unalikeability(self):
 
         if self.sample_size == 0:
             return None
+        elif self.sample_size == 1:
+            return 0
         unalike_sum = 0
         for category in self._categories:
             unalike_sum += (self.sample_size - self._categories[category]) * \

dataprofiler/tests/profilers/test_categorical_column_profile.py

@@ -373,6 +373,16 @@ def test_unalikeability(self):
         profile.update(df_categorical)
         self.assertEqual(profile.unalikeability, 2*(10 + 15 + 6)/90)
 
+        df_categorical = pd.Series(["a"])
+        profile = CategoricalColumn(df_categorical.name)
+        profile.update(df_categorical)
+        self.assertEqual(0, profile.unalikeability)
+
+        df_categorical = pd.Series([])
+        profile = CategoricalColumn(df_categorical.name)
+        profile.update(df_categorical)
+        self.assertEqual(None, profile.unalikeability)
+
     def test_top_k_categories_change(self):
         # Test if top_k_categories is None
         options = CategoricalOptions()

dataprofiler/version.py

@@ -4,7 +4,7 @@
 
 MAJOR               = 0
 MINOR               = 6
-MICRO               = 0
+MICRO               = 1
 
 VERSION             = '%d.%d.%d' % (MAJOR, MINOR, MICRO)