I am attempting build an object which inherits from the built in list object. Essentially I need to do something every time data is added or changed in a list. I have all the over ridding functions working excepting for the functions that over ride the "set slice" functionalitity. For example:
x[1:3] = [6,7] I consulted the reference manual: http://docs.python.org/ref/sequence-methods.html It states that there is a __setslice__ method which is depricated since release 2.0. The depricated function works, but I do not want to implement ontop of functionality that is marked to be removed. "If no __setslice__() is found a slice object is created, and passed to __setitem__()". I executed the below code sample to check this behavior. class newlist(list): def __setitem__(self, i, data): if isinstance(data, slice): print "Received Slice Object" list.__setitem(self, i, data) if __name__ == "__main__": x = newlist([1,2,3,4,5]) x[1:3] = [6,7] print x On a Windows XP machine wiht Python 2.3.5 and a Linux server with Python 2.4.2 I receive the following output: [1, 6, 7, 4, 5] My print statement never gets executed. Am I checking for the slice object incorrectly? That's the only thing I can think of. -Mark -- http://mail.python.org/mailman/listinfo/python-list
