thanks all, >Yes. That's the exact purpose of the in-place operators when they deal with >mutable objects. What else did you expect?
well, frankly I expected a |= b to mean exactly the same as a = a | b regardless of the object type. > The manual explicitly specifies that mutable objects may implement the > operation part of operation-assignments by updating in place -- so that > the object assigned is a mutated version of the original rather than a > new object. could you please refer me a link where this is specified? I couldn't find it in python documentation > This has nothing to do with being inside a function. yes, I know. maybe my example is a bit too verbose. could avoid using functions. But you got my main point. I found it somewhat counter-intuitive that operation-assignments can modify value in place. Regards, Vitali -- http://mail.python.org/mailman/listinfo/python-list
