update readme

README.md

@@ -67,10 +67,13 @@ if __name__ == "__main__":
     # net.net2zone(cell_width=10, cell_height=10, unit="km")
 
     # Synchronize geometry info between zone, node and poi
+    # if you want to save updated node, poi, zone without demand,
+    # you can skip net.run_gravity_model()
+    # and run net.save_results_to_csv(overwrite_file=True) directly
     net.sync_geometry_between_zone_and_node_poi()
 
     # Calculate demand by running gravity model
-    net.run_gravity_model(zone_prod_attr, zone_od_distance_matrix)
+    net.run_gravity_model()
 
     # Save demand, zone, updated node, updated poi to csv
     net.save_results_to_csv(overwrite_file=True)
@@ -99,10 +102,13 @@ if __name__ == "__main__":
     net.taz2zone()
 
     # Synchronize geometry info between zone, node and poi
+    # if you want to save updated node, poi, zone without demand,
+    # you can skip net.run_gravity_model()
+    # and run net.save_results_to_csv(overwrite_file=True) directly
     net.sync_geometry_between_zone_and_node_poi()
 
     # Calculate demand by running gravity model
-    net.run_gravity_model(zone_prod_attr, zone_od_distance_matrix)
+    net.run_gravity_model()
 
     # Save demand, zone, updated node, updated poi to csv
     net.save_results_to_csv(overwrite_file=True)
@@ -131,10 +137,13 @@ if __name__ == "__main__":
     net.taz2zone()
 
     # Synchronize geometry info between zone, node and poi
+    # if you want to save updated node, poi, zone without demand,
+    # you can skip net.run_gravity_model()
+    # and run net.save_results_to_csv(overwrite_file=True) directly
     net.sync_geometry_between_zone_and_node_poi()
 
     # Calculate demand by running gravity model
-    net.run_gravity_model(zone_prod_attr, zone_od_distance_matrix)
+    net.run_gravity_model()
 
     # Save demand, zone, updated node, updated poi to csv
     net.save_results_to_csv(overwrite_file=True)
@@ -163,10 +172,13 @@ if __name__ == "__main__":
     # net.net2zone(cell_width=10, cell_height=10, unit="km")
 
     # Synchronize geometry info between zone, node and poi
+    # if you want to save updated node, poi, zone without demand,
+    # you can skip net.run_gravity_model()
+    # and run net.save_results_to_csv(overwrite_file=True) directly
     net.sync_geometry_between_zone_and_node_poi()
 
     # Calculate demand by running gravity model
-    net.run_gravity_model(zone_prod_attr, zone_od_distance_matrix)
+    net.run_gravity_model()
 
     # Save demand, zone, updated node, updated poi to csv
     net.save_results_to_csv(overwrite_file=True)

README_pkg.md

@@ -48,10 +48,13 @@ if __name__ == "__main__":
     # net.net2zone(cell_width=10, cell_height=10, unit="km")
 
     # Synchronize geometry info between zone, node and poi
+    # if you want to save updated node, poi, zone without demand,
+    # you can skip net.run_gravity_model()
+    # and run net.save_results_to_csv(overwrite_file=True) directly
     net.sync_geometry_between_zone_and_node_poi()
 
     # Calculate demand by running gravity model
-    net.run_gravity_model(zone_prod_attr, zone_od_distance_matrix)
+    net.run_gravity_model()
 
     # Save demand, zone, updated node, updated poi to csv
     net.save_results_to_csv(overwrite_file=True)
@@ -80,10 +83,13 @@ if __name__ == "__main__":
     net.taz2zone()
 
     # Synchronize geometry info between zone, node and poi
+    # if you want to save updated node, poi, zone without demand,
+    # you can skip net.run_gravity_model()
+    # and run net.save_results_to_csv(overwrite_file=True) directly
     net.sync_geometry_between_zone_and_node_poi()
 
     # Calculate demand by running gravity model
-    net.run_gravity_model(zone_prod_attr, zone_od_distance_matrix)
+    net.run_gravity_model()
 
     # Save demand, zone, updated node, updated poi to csv
     net.save_results_to_csv(overwrite_file=True)
@@ -112,10 +118,13 @@ if __name__ == "__main__":
     net.taz2zone()
 
     # Synchronize geometry info between zone, node and poi
+    # if you want to save updated node, poi, zone without demand,
+    # you can skip net.run_gravity_model()
+    # and run net.save_results_to_csv(overwrite_file=True) directly
     net.sync_geometry_between_zone_and_node_poi()
 
     # Calculate demand by running gravity model
-    net.run_gravity_model(zone_prod_attr, zone_od_distance_matrix)
+    net.run_gravity_model()
 
     # Save demand, zone, updated node, updated poi to csv
     net.save_results_to_csv(overwrite_file=True)
@@ -144,6 +153,9 @@ if __name__ == "__main__":
     # net.net2zone(cell_width=10, cell_height=10, unit="km")
 
     # Synchronize geometry info between zone, node and poi
+    # if you want to save updated node, poi, zone without demand,
+    # you can skip net.run_gravity_model()
+    # and run net.save_results_to_csv(overwrite_file=True) directly
     net.sync_geometry_between_zone_and_node_poi()
 
     # Calculate demand by running gravity model

grid2demand/utils_lib/net_utils.py

@@ -70,7 +70,7 @@ class POI:
     poi_type: str = ''
     trip_rate: dict = field(default_factory=dict)
     geometry: str = ''
-    zone_id: int = 0
+    zone_id: int = -1
 
     @property
     def as_dict(self):