moved second topology calculation to end of metrics as it messed up s…

…elf args

topostats/tracing/ordered_tracing.py

@@ -664,15 +664,15 @@ def run_nodestats_tracing(self) -> tuple[list, dict, dict]:
             reverse_min_conf_crossing=False
         )
         self.compile_images(ordered_traces, cross_add, crossing_coords, fwhms)
-        topology_flip = self.compile_trace(reverse_min_conf_crossing=True)[1]
-
         self.grain_tracing_stats["num_mols"] = len(ordered_traces)
+
         writhe_string, node_to_writhes = self.identify_writhes()
         self.grain_tracing_stats["writhe_string"] = writhe_string
-
         for node_num, node_writhes in node_to_writhes.items():  # should self update as the dicts are linked
             self.nodestats_dict[f"node_{node_num+1}"]["writhe"] = node_writhes
 
+        topology_flip = self.compile_trace(reverse_min_conf_crossing=True)[1]
+
         ordered_trace_data = {}
         grain_mol_tracing_stats = {}
         for i, mol_trace in enumerate(ordered_traces):