example of collisions in metaclass

collisions.py

class Meta(type):
    def __new__(cls, clsname, bases, dct):
        print "__new__"
        print cls
        print clsname
        print bases
        print dct
        attrs = dct.pop('_pairs')
        for v, k in attrs:
            setattr(cls, k, v)            
        return type.__new__(cls, clsname, bases, dct)

class TestObject(object):
    __metaclass__ = Meta

    """reflects constants in _test_object"""
    _pairs = (
        ( 1       , 'A' ),         
    )

class OtherObject(object):
    __metaclass__ = Meta

    """reflects constants in _test_object"""
    _pairs = (
        ( 1       , 'F' ),         
        ( 900       , 'A' ),
    )


print "TestObject"
print dir(TestObject)
print "~"*80
print "OtherObject"
print dir(OtherObject)
print "~"*80
print "Meta"
print dir(Meta)

print TestObject.A
print OtherObject.A
print TestObject.F
print OtherObject.F