When you inherit from Acquisition.Implicit, your class becomes an extension class. The idiom that the Thread mixin uses is that you always need to call its init, and it expects self to be an instance of the "Thread" Python class in some way. It is instead an extension class. One way to solve it is to work around the problem by not inheriting from both Implcit and Thread in the same class. Another way is to override __init__ and use the "inheritedAttribute" idiom to call the superclass' __init__ with something it can deal with. Search the maillist for more info. Magnus Heino wrote:

Can someone please tell me what is going on here?

[magnus@bombardier magnus]$ cat aq.py

from Acquisition import Implicit from threading import Thread import time

class A(Implicit, Thread):

def run(self): print context.aq_self

class B(Implicit): pass

b = B() b.a = A() b.a.start() time.sleep(2)

[magnus@bombardier magnus]$ python2 aq.py Traceback (most recent call last): File "aq.py", line 16, in ? b.a = A() File "/usr/lib/python2.1/threading.py", line 326, in __init__ _Verbose.__init__(self, verbose) TypeError: unbound method __init__() must be called with instance as first argument

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