On Sun, 13 Jan 2008 16:03:16 -0600 Robert Kern <[EMAIL PROTECTED]> wrote:
> Martin Manns wrote: > > Hi, > > > > I have created a class that wraps a numpy array of custom objects. I > > would like to be able to slice respective objects (without copying > > the array if possible). > > > > I have browsed the doc and found some hints at __getitem__. > > However, I still do not grasp how to do it. How do I implement > > __getitem__ correctly? > > > mymap[10:20,15:20,:] # This line should work afterwards > > The first thing you should do is simply implement a very basic, > nonfunctional version just to see what objects come in: > > In [1]: class Sliceable(object): > ...: def __getitem__(self, arg): > ...: print arg > ...: I did that and got here: > (slice(None, None, 2), slice(10, None, 10)) However, I still do not see how I get a Map object that employs a slice of the array without creating a new Map object. Martin -- http://mail.python.org/mailman/listinfo/python-list
