In IPython, DjangoChoices.labels raises AttributeError for 'keys'

[ffigiel]

Hi, I noticed this behavior in ipython. Here's my environment:

Python 3.4.3

Django==1.9.6
django-choices==1.4.2
ipython==4.2.0

And the traceback:

In [20]: class C(DjangoChoices):
    a = ChoiceItem('a', 'A')
    b = ChoiceItem('b', 'B')
    c = ChoiceItem('c', 'C')
   ....:     

In [21]: C.labels
Out[21]: AttributeError
Traceback (most recent call last)
python3.4/site-packages/IPython/core/formatters.py in __call__(self, obj)
    697                 type_pprinters=self.type_printers,
    698                 deferred_pprinters=self.deferred_printers)
--> 699             printer.pretty(obj)
    700             printer.flush()
    701             return stream.getvalue()

python3.4/site-packages/IPython/lib/pretty.py in pretty(self, obj)
    366                 if cls in self.type_pprinters:
    367                     # printer registered in self.type_pprinters
--> 368                     return self.type_pprinters[cls](obj, self, cycle)
    369                 else:
    370                     # deferred printer

python3.4/site-packages/IPython/lib/pretty.py in inner(obj, p, cycle)
    607             return p.text('{...}')
    608         p.begin_group(1, start)
--> 609         keys = obj.keys()
    610         # if dict isn't large enough to be truncated, sort keys before displaying
    611         if not (p.max_seq_length and len(obj) >= p.max_seq_length):

python3.4/site-packages/djchoices/choices.py in __getattribute__(self, name)
     17             return result
     18         else:
---> 19             raise AttributeError("Label for field %s was not found." % name)
     20 
     21     def __setattr__(self, name, value):

AttributeError: Label for field keys was not found.

[ffigiel]

The same code runs okay in a python script so it's not an urgent bug, however DjangoChoices probably tries to be too smart/hacky?

[sergei-maertens]

Interesting, it seems like the metaclass is not running properly. I'll see if I can investigate in a few hours. For completeness sake - does this also happen on a regular python shell and/or bpython?

[ffigiel]

C.labels Works in regular shell as well as python script