n_calc fix

ecat.py

@@ -61,7 +61,7 @@ class ECA(nn.Module):
     @property
     def n_calc(self) -> int:
         """Number of already calculated components"""
-        return self.V.size()[0] if self.V else None
+        return self.V.size()[0] if self.V is not None else None
 
     def _init(self, n: int, start: int = 0) -> None:
         """