docs: def load_or_create_config(self, filename, config=None):
          """Loads a config from disk.  Defaults to a random config if none is specified"""
          os.makedirs(os.path.dirname(os.path.expanduser(filename)), exist_ok=True)
          if os.path.exists(filename):
              return self.load(filename)
  
          if(config == None):
              config = self.random_config()
  
          self.save(filename, config)
          return config