[Zope-dev] zope.interface 4.0.0 considered annoying.

[Tres Seaver]

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