[Python-Dev] subclassing builtin data structures

[Alexander Belopolsky]

On Fri, Feb 13, 2015 at 1:11 PM, Guido van Rossum <guido at python.org> wrote:

>
>
>> Note that the original pure python prototype of the datetime module had
>> date.__add__ and friends call self.__class__(year, month, day).
>> Unfortunately, it looks like the original sandbox did not survive the the
>> hg conversion, so I cannot provide a link to the relevant history.
>>
>
> FWIW you're wrong when you claim that "a constructor is no different from
> any other method". Someone else should probably explain this (it's an old
> argument that's been thoroughly settled).
>

Well, the best answer I've got in the past [1] was "ask on python-dev since
Guido called the operator overriding expectation." :-)

[1] http://bugs.python.org/issue2267#msg108060
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