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[Bug 927650] Re: cfg: unneeded multiple inheritance


Fix proposed to branch: master
Review: https://review.openstack.org/4059

** Changed in: openstack-common
       Status: Confirmed => In Progress

** Changed in: openstack-common
     Assignee: (unassigned) => Zhongyue Luo (lzyeval)

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  cfg: unneeded multiple inheritance

Status in openstack-common:
  In Progress

Bug description:
  From Monsyne Dragon in https://review.openstack.org/3729

    File nova/openstack/common/cfg.py
    Line 696: class ConfigOpts(collections.Mapping, object):
    I don't think we really need to multiply inherit from 'object' here. 
    esp. since collections.Mapping already inherits from object.

    While this doesn't affect anything atm, this kind of diamond inheritance may lead to some rather non-intuitive behavior if  
    someone subclasses ConfigOpts in the future

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