Question

我有一个对象

class Lists:
    pass

for item in items_list:
    name = str(item.theme)
    if hasattr(Lists, name):
        setattr(Lists, name, [])
        append(value) to this array

    else:
        setattr(Lists, name, [])

如果此对象具有此属性，我只将值附加到此列表。否则，我想将此属性添加到对象，然后将值附加到此列表。

Answer 1

您可以使用setattr + getattr。这是一个小例子。

class A:
    pass

attr = ['foo', 'bar', 'baz', 'foo', 'foo', 'baz']
vals = range(len(attr))

for i, j in zip(attr, vals):
     if not hasattr(A, i):
         setattr(A, i, [])  # the attribute is created if it didn't already exist

     getattr(A, i).append(j)

vars(A)     
mappingproxy({..., 'bar': [1], 'baz': [2, 5], 'foo': [0, 3, 4]})

Answer 2

要向对象添加属性，请使用：

Lists.name = lambda: None

您的代码现在看起来像：

class Lists:
    pass   

for item in items_list:
    name = str(item.theme)
    if hasattr(Lists, name):
        setattr(Lists, name, [])
        append(value) to this array

    else:
        Lists.name = lambda: None
        setattr(Lists, name, [])

如果此列表是某个对象的属性，如何将数据添加到列表中

2 个答案: