Concatenator update

cascade/data/concatenator.py

@@ -64,23 +64,14 @@ def __len__(self) -> int:
         """
         return sum([len(ds) for ds in self._datasets])
 
-    def __repr__(self) -> str:
-        """
-        Mentions joined datasets in its repr in form:
-        Concatenator of
-        Dataset1
-        Dataset2
-        ...
-        """
-        rp = super().__repr__()
-        return f"{rp} of\n" + "\n".join(repr(ds) for ds in self._datasets)
 
     def get_meta(self) -> Meta:
         """
         Concatenator calls `get_meta()` of all its datasets
         """
         meta = super().get_meta()
         meta[0]["data"] = [ds.get_meta() for ds in self._datasets]
+        meta[0]["num_concatenated"] = len(self._datasets)
         return meta
 
     def from_meta(self, meta: Meta) -> None:

cascade/tests/data/test_concatenator.py

@@ -31,6 +31,7 @@ def test_meta():
 
     c = Concatenator([n1, n2])
     assert len(c.get_meta()[0]["data"]) == 2
+    assert c.get_meta()[0]["num_concatenated"] == 2
 
 
 def test_from_meta():