add deprecation warning for cindex and dindex

Author: timonmerk

cebra/data/single_session.py

@@ -274,10 +274,22 @@ class MixedDataLoader(cebra_data.Loader):
     positive_sampling: str = dataclasses.field(default="discrete_variable")
     discrete_sampling_prior: str = dataclasses.field(default="uniform")
 
+    @property
+    def dindex(self):
+        warnings.warn("dindex is deprecated. Use discrete_index instead.",
+                      DeprecationWarning)
+        return self.dataset.discrete_index
+
     @property
     def discrete_index(self):
         return self.dataset.discrete_index
 
+    @property
+    def cindex(self):
+        warnings.warn("cindex is deprecated. Use continuous_index instead.",
+                      DeprecationWarning)
+        return self.dataset.continuous_index
+
     @property
     def continuous_index(self):
         return self.dataset.continuous_index