[Python-bugs-list] [ python-Bugs-420304 ] getattr function w/ default

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Bugs item #420304, was updated on 2001-04-30 17:14
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Category: Python Interpreter Core
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Greg Chapman (glchapman)
Assigned to: Nobody/Anonymous (nobody)
Summary: getattr function w/ default

Initial Comment:
In Python 2.1, when calling the builtin getattr 
function and supplying the (optional) default 
argument, this default is returned on any exception 
raised during PyObject_GetAttr, even if the exception 
is not an AttributeError.  I did not expect this 
behavior after reading the getattr documentation.  Is 
this the  intended behavior?  (If so, I think the 
documentation should be made clearer on this point.)

Example (providing a non-string as the attribute name):

>>> class Test:
... 	pass
... 
>>> t = Test()
>>> getattr(t, 1, "hello")
'hello'
>>> 


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Comment By: Chris Cogdon (chriscog)
Date: 2001-05-03 17:55

Message:
Logged In: YES 
user_id=67116

Looks like an attribute error to me. consider this:

>>> getattr (t,fred,"thingy")
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
NameError: There is no variable named 'fred'

Ie, in your own example, it couldn't find an attribute '1' 
in the class, even if its an integer attribute (which is 
only obtainable using getattr/setattr). That's exactly what 
AttributeError is

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