我應該使用哪種方法？

Question

>>> class StrictList(list): 
...  def __init__(self,content=None): 
...   if not content: 
...    self.content = [] 
...    self.type = None 
...   else: 
...    content = list(content) 
...    cc = content[0].__class__ 
...    if l_any(lambda x: x.__class__ != cc, content): 
...     raise Exception("List items must be of the same type") 
...    else: 
...     self.content = content 
...     self.type = cc 
... 
>>> x = StrictList([1,2,3,4,5]) 
>>> x 
[] 
>>> x.content 
[1, 2, 3, 4, 5] 

我想能夠調用x時不x.content

Answer 1

您試圖繼承list但從未調用列表__init__方法返回的內容。加入：

super(StrictList, self).__init__(content) 

將項目添加到自我。有沒有需要分配給self.content：

>>> class StrictList(list): 
...  def __init__(self,content=None): 
...   super(StrictList, self).__init__(content) 
... 
>>> s = StrictList([1, 2, 3]) 
>>> len(s) 
3 
>>> s[0] 
1