如何从model\u utils三重选择中获取密钥?

如果我有一些选择:

In [1]: from model_utils import Choices

In [2]: CHOICES = Choices(
   ...:         (1, 'somekey', 'The long title'),
   ...:     )

In [3]: CHOICES[1]
Out[3]: 'The long title'

somekey 钥匙? This answer 不适合我。

In [10]: {v: k for k, v in dict(CHOICES).iteritems()}
Out[10]: {'The long title': 1}