fixing imports to absolute paths

Author: sevmag

src/graphnet/models/data_representation/graphs/graph_definition.py

@@ -13,7 +13,7 @@
 from graphnet.models.detector import Detector
 from .edges import EdgeDefinition
 from .nodes import NodeDefinition, NodesAsPulses
-from ..data_representation import DataRepresentation
+from graphnet.models.data_representation import DataRepresentation
 from torch_geometric.data import Data
 
 

src/graphnet/models/data_representation/graphs/nodes/nodes.py

@@ -8,7 +8,7 @@
 
 from graphnet.utilities.decorators import final
 from graphnet.models import Model
-from ..utils import (
+from graphnet.models.data_representation.graphs.utils import (
     cluster_and_pad,
     identify_indices,
     lex_sort,