Fix bug with opening pickle files from a pickle created in another operating system (for Windows and Linux only)

hub/city_model_structure/city.py

@@ -12,6 +12,8 @@ import copy
 import logging
 import math
 import pickle
+import sys
+import pathlib
 from pathlib import Path
 from typing import List, Union
 
@@ -293,6 +295,11 @@ class City:
     :param city_filename: city filename
     :return: City
     """
+    if sys.platform == 'win32':
+      pathlib.PosixPath = pathlib.WindowsPath
+    elif sys.platform == 'linux':
+      pathlib.WindowsPath = pathlib.PosixPath
+
     with open(city_filename, 'rb') as file:
       return pickle.load(file)