I think having a record array field renaming api is a good idea.. I was going to create a ticket for this, but I don't think I have permissions to do this. Can someone who has the permissions, please create it? Thanks.
Sameer On Thu, Feb 28, 2008 at 10:48 AM, Travis E. Oliphant <[EMAIL PROTECTED]> wrote: > > Sameer DCosta wrote: > > Hi, > > > > I'm having trouble renaming record array fields if they contain object > > arrays in them. I followed the solutions posted by Robert Kern and > > Stefan van der Walt (Thanks again) but it doesn't look like this > > method works in all cases. For reference: > > > http://projects.scipy.org/pipermail/numpy-discussion/2008-February/031509.html > > > > In [1]: from numpy import * > > > > In [2]: olddt = dtype([('foo', '|O4'), ('bar', float)]) > > > > In [3]: a = zeros(10, olddt) > > > > In [4]: a > > Out[4]: > > array([(0, 0.0), (0, 0.0), (0, 0.0), (0, 0.0), (0, 0.0), (0, 0.0), > > (0, 0.0), (0, 0.0), (0, 0.0), (0, 0.0)], > > dtype=[('foo', '|O4'), ('bar', '<f8')]) > > > > In [5]: newdt = dtype([('notfoo', '|O4'), ('notbar', float)]) > > > > In [6]: b = a.view(newdt) > > --------------------------------------------------------------------------- > > TypeError Traceback (most recent call last) > > > > /home/titan/sameer/projects/<ipython console> > > > > TypeError: Cannot change data-type for object array. > > > > This looks like a bug. We are being a bit over-zealous in protecting > you from getting access to pointers and in the process making it > impossible to rename Object fields. > > Perhaps an actual field-renaming API (which would be relatively easy) is > useful. > > -Travis O. > _______________________________________________ Numpy-discussion mailing list [email protected] http://projects.scipy.org/mailman/listinfo/numpy-discussion
