[ZCM] [ZC] 2348/ 2 Comment "zope.interface attribute error"

Issue #2348 Update (Comment) "zope.interface attribute error"
 Status Pending, Zope/bug medium
To followup, visit:
  http://www.zope.org/Collectors/Zope/2348

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= Comment - Entry #2 by philikon on Aug 21, 2007 11:39 am

Judging from the error message, you have not defined an interface but a class (*type* object ... has no attribute '__iro__').

Compare this with:

>>> class ICurrencyManager(object):
...   pass
... 
>>> ICurrencyManager.__iro__
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
AttributeError: type object 'ICurrencyManager' has no attribute '__iro__'

So, it seems you inherited from 'object' instead of 'zope.interface.Interface' by mistake.
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= Request - Entry #1 by wichert on Aug 21, 2007 5:30 pm

During development on persistent utilities I occasionally run into this error:

  Module Products.CMFCore.PortalObject, line 72, in getSiteManager
  Module ZODB.Connection, line 761, in setstate
  Module ZODB.Connection, line 819, in _setstate
  Module ZODB.serialize, line 605, in setGhostState
  Module zope.component.persistentregistry, line 42, in __setstate__
  Module zope.interface.adapter, line 80, in _createLookup
  Module zope.interface.adapter, line 389, in __init__
  Module zope.interface.adapter, line 426, in init_extendors
  Module zope.interface.adapter, line 430, in add_extendor
AttributeError: type object 'ICurrencyManager' has no attribute '__iro__'

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