[Zope-dev] zope.interface 4.0.0 considered annoying.
Tres Seaver
tseaver at palladion.com
Sun May 20 04:08:14 UTC 2012
On 05/19/2012 07:23 PM, Jim Fulton wrote:
> On Sat, May 19, 2012 at 5:59 PM, Tres Seaver <tseaver at palladion.com>
> wrote:
>> On 05/19/2012 12:12 PM, Jim Fulton wrote:
>>> The declaration-syntax warnings in the zope.interface 4.0.0 are
>>> annoying and mostly pointless.
>>>
>>> There will be enough pain in porting applications to Python 3,
>>> avoiding the surprise of having to use a different
>>> interface-declaration syntax will not be of any consequence.
>>>
>>> While the deprecation warning may provide some tiny benefit, the
>>> annoyance, especially for applications or libraries that still
>>> support Python 2.5 far outweights the benefit.
>>
>> We're in an odd spot: the Python3 support for zope.interface
>> mostly works, but the class advice bits (implements,
>> implementsOnly, classProvides) fail silently under Python3 before
>> 4.0.0: they literally have no effect due to changes in class
>> initialization machinery. zope.interface 4.0.0 changes those silent
>> failures into exceptions (which is what I thought you were going to
>> complain about).
>
> I'd forgotten the fail silently bit. Can't we make the fail loudly
> for Python 3?
They already do: 4.0.0 makes them exceptions under Python3: that fact
was actually my rationale for the warnings under Python2, to allow folks
to find and remediate them before porting.
I will release a 4.0.1 silencing the warnings unless somebody speaks up
in their favor.
Tres.
--
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Tres Seaver +1 540-429-0999 tseaver at palladion.com
Palladion Software "Excellence by Design" http://palladion.com
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