[Python-Dev] [Python-checkins] peps: Add PEP 422: Dynamic Class Decorators (original) (raw)

Jan Kaliszewski zuo at chopin.edu.pl
Tue Jun 5 23:30:38 CEST 2012

Terry Reedy dixit (2012-06-05, 12:42):

On 6/5/2012 8:09 AM, nick.coghlan wrote:

> Add PEP 422: Dynamic Class Decorators [snip] >+So too will the following be roughly equivalent (aside from inheritance):: >+ >+ class C: >+ decorators = [deco2, deco1] I think you should just store the decorators in the correct order of use + decorators = [deco1, deco2] and avoid the nonsense (time-waste) of making an indirect copy via listiterator and reversing it each time the attribute is used.

+1. For @-syntax the inverted order seems to be somehow natural. But I feel the list order should not mimic that...

Another idea: what about...

@@dynamic_deco2
@@dynamic_deco1
class C:
    pass

...being an equivalent of:

class C:
    __decorators__ = [dynamic_deco1, dynamic_deco2]

...as well as of:

@@dynamic_deco2
class C:
    __decorators__ = [dynamic_deco1]

?

Cheers. *j

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