Carsten Haese wrote: > The current documentation states that "Starting with Python 2.3, the > sort() method is guaranteed to be stable." However, it's not clear > whether this specifies language behavior that all implementations must > adhere to, or whether it simply documents an implementation detail of > CPython.
This is a requirement for all implementations claiming to be 2.3 or higher. The "key" parameter was only introduced in 2.4 ... Tim Delaney -- http://mail.python.org/mailman/listinfo/python-list