Gregor Horvath wrote:
> Hi,
>
> class A(object):
> test = "test"
>
> class B(object):
> a = A()
>
>
> In [36]: B.a.test
> Out[36]: 'test'
>
> In [37]: getattr(B, "a.test")
> ---------------------------------------------------------------------------
> <type 'exceptions.AttributeError'> Traceback (most recent call
> last)
>
> /<ipython console> in <module>()
>
> <type 'exceptions.AttributeError'>: type object 'B' has no attribute
> 'a.test'
>
> ???
I think that message is pretty clear. B doesn't have an attribute "a.test",
it has an attribute "a" which in turn has an attribute "test". You can
access it by calling getattr() twice,
>>> getattr(getattr(B, "a"), "test")
'test'
make your own function that loops over the attributes, or spell it
>>> reduce(getattr, "a.test".split("."), B)
'test'
> Documentation says B.a.test and getattr(B, "a.test") should be equivalent.
>
> http://docs.python.org/lib/built-in-funcs.html
No, it doesn't.
Peter
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