listing attributes

[Peter Hansen]

Steven D'Aprano wrote:
> On Mon, 13 Feb 2006 22:18:56 -0500, Peter Hansen wrote:
>>Thomas Girod wrote:
>>>I'm trying to get a list of attributes from a class. The dir() function
>>>seems to be convenient, but unfortunately it lists to much - i don't
>>>need the methods, neither the built-in variables.
>>>
>>>In fact, all my variables are referencing to objects of the same type.
>>>Can anyone suggest me a way to get this list of variables ?
>>
>>Does the __dict__ attribute help you?  (Try viewing obj.__dict__ at the 
>>interpreter prompt and see if it has what you expect. 
>>obj.__dict__.keys() would be just the names of those attributes.)
> 
>>>>Parrot.__dict__.keys()
> 
> ['__module__', 'ATTR', 'method', '__dict__', '__weakref__', '__doc__']
> 
> So I guess the answer to that question is, while __dict__ gives less
> information than dir, it still gives too much.

I was making the perhaps mistaken assumption that the OP was another of 
those who meant "object" when he said "class" (though I could perhaps 
have asked that explicitly).

If that were the case, I think __dict__ could be what he wanted.  (I'm 
still not sure what he wanted, even after reading his response, since I 
can't see what his classes or objects look like...)

 >>> class Parrot(object):
...   ATTR = None
...   def method(self):
...     return None
...
 >>> polly = Parrot()
 >>> polly.foo = '1'
 >>> polly.bar = 'baz'
 >>> polly.__dict__
{'foo': '1', 'bar': 'baz'}

-Peter