feat: allow nested basins

CHANGELOG

@@ -1,4 +1,5 @@
-0.55.8
+0.56.0
+ - feat: allow nested basins
  - fix: make sure basins are always closed on context exit (#238)
  - enh: requests session pooling for fmt_http and fmt_dcor
  - enh: implement context manager for RTDCBase

dclab/rtdc_dataset/feat_basin.py

@@ -102,9 +102,18 @@ def ds(self):
 
     @property
     def features(self):
-        """Features made available by the basin"""
+        """Features made available by the basin
+
+        .. versionchanged: 0.56.0
+
+           Return nested basin features
+        """
         if self._features is None:
-            self._features = self.ds.features_innate
+            # If features are not specified already, either by previous call
+            # to this method or during initialization from basin definition,
+            # then make the innate and *all* the basin features available.
+            self._features = sorted(set(self.ds.features_innate
+                                        + self.ds.features_basin))
         return self._features
 
     def as_dict(self):