merge with developMerge branch 'develop' into 323-fix_bin_size_with_sample_weight

Author: YC-1412

optbinning/binning/continuous_binning.py

@@ -903,7 +903,8 @@ def _prebinning_refinement(self, splits_prebinning, x, y, y_missing,
     def _compute_prebins(self, splits_prebinning, x, y, sw):
         n_splits = len(splits_prebinning)
         if not n_splits:
-            return splits_prebinning, np.array([]), np.array([])
+            return (splits_prebinning, np.array([]), np.array([]), np.array([]),
+                    np.array([]), np.array([]), np.array([]), np.array([]))
 
         if self.dtype == "categorical" and self.user_splits is not None:
             indices = np.digitize(x, splits_prebinning, right=True)

tests/test_binning_piecewise.py

@@ -188,8 +188,7 @@ def test_default_discontinuous():
     optb.fit(x, y)
 
     optb.binning_table.build()
-    assert optb.binning_table.iv == approx(5.84465825, rel=1e-6)
-
+    assert optb.binning_table.iv == approx(5.84465825, rel=1e-4)
 
 def test_bounds_transform():
     optb = OptimalPWBinning(name=variable)