old_contents: import pkgutil
  import sys
  
  class Test:
      def run(self):
          """
          for loader, module_name, is_pkg in pkgutil.walk_packages(__path__):
              mod = loader.find_module(module_name).load_module(module_name)
              try:
                  cls = mod._Test
                  cls.run()
              except:
                  print("Error: ", module_name)
                  sys.exit(1)
          """
          sys.exit(0)
  
  
  if __name__ == "__main__":
      Test().run()
new_contents: import pkgutil
  import sys
  
  class Test:
      def run(self):
          """
          for loader, module_name, is_pkg in pkgutil.walk_packages(__path__):
              mod = loader.find_module(module_name).load_module(module_name)
              try:
                  cls = mod._Test
                  cls.run()
              except:
                  print("Error: ", module_name)
                  sys.exit(1)
          """
          print("test mod")
          sys.exit(0)
  
  
  if __name__ == "__main__":
      Test().run()
subject: Update test mod