[issue1734] no effect if metaclass modifies dict

[Amaury Forgeot d'Arc]

Amaury Forgeot d'Arc added the comment:

When designing a metaclass, you should override __new__, not __init__:

class MetaNode(type):
   def __new__(cls, name, bases, cdict):
       cdict['z'] = name
       return type.__new__(cls, name, bases, cdict)

class Node(object):
   __metaclass__ = MetaNode

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nosy: +amaury.forgeotdarc
resolution:  -> invalid
status: open -> closed

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