code: def set_value(dictionary, keys, value):
      
      if not keys:
          dictionary.update(value)
          return
  
      for key in keys[:-1]:
          if key not in dictionary:
              dictionary[key] = {}
          dictionary = dictionary[key]
  
      dictionary[keys[-1]] = value
docs: Similar to Python's built in `dictionary[key] = value`,
      but takes a list of nested keys instead of a single key.
  
      set_value({'a': 1}, [], {'b': 2}) -> {'a': 1, 'b': 2}
      set_value({'a': 1}, ['x'], 2) -> {'a': 1, 'x': 2}
      set_value({'a': 1}, ['x', 'y'], 2) -> {'a': 1, 'x': {'y': 2}}