On Wed, 30 Dec 2015 11:51:19 +0000, Charles T. Smith wrote:
> Hi,
>
> How can I get *all* the names of an object's attributes? I have legacy
> code with mixed new style classes and old style classes and I need to
> write methods which deal with both. That's the immediate problem, but
> I'm always running into the need to understand how objects are linked,
> in particular when in pdb. The answers one always sees on StackOverflow
> is that you don't need to understand, understanding is not the pythonic
> way to do things.
>
> Alternatively, is there are map documented somewhere - more complete
> than python/python-2.7.3-docs-html/library/stdtypes.html?
> highlight=class#special-attributes
>
> Or, is the code available uncompiled somewhere on my machine?
>
> Does anyone know *why* the __members__ method was deprecated, to be
> replaced by dir(), which doesn't tell the truth (if only it took an
> optional parameter to say: "be truthful")
>
> cts
For example:
(PDB)pp dir (newclass.__class__)
['__class__',
'__delattr__',
'__dict__',
'__doc__',
'__format__',
'__getattribute__',
'__hash__',
'__init__',
'__module__',
'__new__',
'__reduce__',
'__reduce_ex__',
'__repr__',
'__setattr__',
'__sizeof__',
'__str__',
'__subclasshook__',
'__weakref__',
'm2']
(PDB)pp dir (oldclass.__class__)
['__doc__', '__module__', 'm3']
(PDB)pp (oldclass.__class__.__name__)
'C3'
(PDB)pp (newclass.__class__.__name__)
'C2'
Both dir() invocations are lying to me. The old-style class even ignores
the pretty-print command.
I'm glad I discovered __mro__(), but how can I do the same thing for old-
style classes?
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