Avoid adding columns when converting to networkx

src/snkit/network.py

@@ -694,18 +694,16 @@ def to_networkx(network, directed=False, weight_col=None):
             G = nx.MultiDiGraph()
         # get nodes from network data
         G.add_nodes_from(network.nodes.id.to_list())
+
         # add nodal positions from geom
-        network.nodes["pos"] = list(
-            zip(network.nodes.geometry.x, network.nodes.geometry.y)
-        )
-        pos = network.nodes.set_index("id").to_dict()["pos"]
-        for n, p in pos.items():
-            G.nodes[n]["pos"] = p
+        for node_id, x, y in zip(network.nodes.id, network.nodes.geometry.x, network.nodes.geometry.y):
+            G.nodes[node_id]["pos"] = (x, y)
+
         # get edges from network data
         if weight_col is None:
-            network.edges["weight"] = network.edges.geometry.length
+            # default to geometry length
             edges_as_list = list(
-                zip(network.edges.from_id, network.edges.to_id, network.edges.weight)
+                zip(network.edges.from_id, network.edges.to_id, network.edges.geometry.length)
             )
         else:
             edges_as_list = list(