Validates number of dimensions in input to ht.sparse.sparse_csr_matrix

heat/sparse/factories.py

@@ -126,6 +126,9 @@ def sparse_csr_matrix(
         except RuntimeError:
             raise TypeError(f"Invalid data of type {type(obj)}")
 
+    if obj.ndim != 2:
+        raise Exception("The number of dimensions must be 2, found " + str(obj.ndim))
+
     if obj.layout != torch.sparse_csr:
         obj = obj.to_sparse_csr()