Why do data descriptors (e.g. properties) take priority over instance attributes?
Peter J. Holzer
hjp-python at hjp.at
Thu Dec 27 08:24:12 EST 2018
On 2018-12-27 14:17:34 +0100, Peter J. Holzer wrote:
> On 2018-12-17 21:57:22 +1100, Paul Baker wrote:
> > class C:
> > def __init__(self):
> > self.__dict__['a'] = 1
> >
> > @property
> > def a(self):
> > return 2
> >
> > o = C()
> > print(o.a) # Prints 2
>
> What version of Python is this? I get a different result:
>
> Python 3.6.7 (default, Oct 22 2018, 11:32:17)
> [GCC 8.2.0] on linux
> Type "help", "copyright", "credits" or "license" for more information.
> >>> class C:
> ... def __init__(self):
> ... self.__dict__['a'] = 1
> ... @property
> ... def a(self):
> ... return 2
> ...
> >>> o = C()
> >>> o.a
> 1
Oops. I messed up the indentation.
With the same indentation I get the same result.
hp
--
_ | Peter J. Holzer | we build much bigger, better disasters now
|_|_) | | because we have much more sophisticated
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__/ | http://www.hjp.at/ | -- Ross Anderson <https://www.edge.org/>
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