On Tue, Aug 24, 2010 at 8:15 AM, Nick Coghlan <ncogh...@gmail.com> wrote:
> Now, it may be worth considering an addition to the inspect module
> that was basically:
>
> def getattr_static(obj, attr):
> """Retrieve attributes without triggering dynamic lookup via the
> descriptor protocol,
> __getattr__ or __getattribute__.
>
> Note: this function may not be able to retrieve all attributes
> reported by dir(obj)
> """
> try:
> instance_dict = object.__getattribute__(obj, "__dict__")
> except AttributeError:
> pass
> else:
> if attr in instance_dict:
> return instance_dict[attr]
> for entry in getmro(obj.__class__):
> try:
> return entry.__dict__[attr]
> except AttributeError:
> pass
Second attempt with a default value parameter and correctly raising
AttributeError if not found:
_sentinel = object()
def getattr_static(obj, attr, default=_sentinel):
"""Retrieve attributes without triggering dynamic lookup via the
descriptor protocol, __getattr__ or __getattribute__.
Note: this function may not be able to retrieve all attributes
reported by dir(obj)
"""
try:
instance_dict = object.__getattribute__(obj, "__dict__")
except AttributeError:
pass
else:
if attr in instance_dict:
return instance_dict[attr]
for entry in getmro(obj.__class__):
try:
return entry.__dict__[attr]
except AttributeError:
pass
if default is not _sentinel:
return default
raise AttributeError(attr)
Cheers,
Nick.
--
Nick Coghlan | ncogh...@gmail.com | Brisbane, Australia
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