Python libtcod：对象描述功能错误

Question

我正在通过libtcod python教程开展工作，我决定在今天使一些代码更加独特，并决定开始使用一个功能允许玩家将鼠标悬停在某个物体上，然后按'd'查看该物体的描述。

我目前遇到属性错误：'str'对象没有属性'describe'line 657.我尝试了很多不同的东西，但notihng似乎工作，不幸的是我的理解水平现在相当有限所以我无法弄清楚发生了什么问题。

下面是相关类和函数：

class Object: 
    #this is a generic object: the player, a monster, an item, the stairs... 
    #it's always represented by a character on screen. 
    def __init__(self, x, y, char, name, color, blocks=False, fighter=None, ai=None, item=None, description=None): 
     self.x = x 
     self.y = y 
     self.char = char 
     self.name = name 
     self.color = color 
     self.blocks = blocks 
     self.fighter = fighter 
     if self.fighter: #let the fighter component know who owns it 
      self.fighter.owner = self 
     self.ai = ai 
     if self.ai: #let the ai component know who owns it 
      self.ai.owner = self 
     self.item = item 
     if self.item: #let the item component know who owns it, like a bitch 
      self.item.owner = self 
     self.description = self 
     if self.description: #let the description component know who owns it 
      self.description.owner = self 

    def describe(self): 
     #describe this object 
     message(self.description, libtcod.white) 

def handle_keys(): 
    global keys; 

      if key_char == 'd': 
       #show the description menu, if an item is selected, describe it. 
       chosen_object = description_menu('Press the key next to an object to see its description.\n') 
       if chosen_object is not None: 
        chosen_object.describe() 

      return 'didnt-take-turn' 

def description_menu(header): 

    global mouse 

    #return a string with the names of all objects under the mouse 
    (x, y) = (mouse.cx, mouse.cy) 

    #create a list with the names of all objects at the mouse's coordinates and in FOV 
    names = [obj.name for obj in objects if obj.x == x and obj.y == y and libtcod.map_is_in_fov(fov_map, obj.x, obj.y)] 

    names = ', '.join(names) #join the names, seperated by commas 
    return names.capitalize() 

    #show a menu with each object under the mouse as an option 
    if len(names) == 0: 
     options = ['There is nothing here.'] 
    else: 
     options = [item.name for item in names] 

    index = menu(header, options, INVENTORY_WIDTH) 

    #if an item was chosen, return it 
    if index is None or len(names) == 0: return None 
    return names[index].description 

任何帮助，将不胜感激！

Answer 1

功能description_menu()具有以下return

names[index].description 

这是属于Object字符串构件。
当你说

chosen_object.describe() 

您所呼叫的describe()方法，而是属于Object类，而不是一个字符串（因此attribute error: 'str' object has no attribute 'describe'）。您将不得不description_menu()返回Object而不是它的名称。