gistfile1.txt

>>> class Bar:
...     def __init__(self):
...         print "bar init"
... 
>>> @attr.s
... class Foo(Bar, object):
...     something = attr.ib()
... 
>>> Foo("something")
Foo(something='something')
>>> 

>>> class NewBar(object):
...  def __init__(self):
...   print "in newbar"
... 
>>> @attr.s
... class NewFoo(NewBar):
...  something = attr.ib()
... 
>>> NewFoo("something")
NewFoo(something='something')
>>>