Fernando Perez wrote: > Hi all, > > I'm wondering if the following difference in behavior of object arrays should > be considered a bug. Let a and b be: > > In [21]: a = [0,1] > > In [22]: b = [ None, None] > > If we concatenate a with an empty list, it works: > > In [23]: numpy.concatenate(([],a)) > Out[23]: array([0, 1]) > > But not so for b: > > In [24]: numpy.concatenate(([],b)) > --------------------------------------------------------------------------- > exceptions.ValueError Traceback (most recent > call last) > > /home/fperez/<ipython console> > > ValueError: 0-d arrays can't be concatenated >
This is a result of PyArray_FromAny changing when object arrays are explicitly requested (which they are in this case --- although behind the scenes). I decided to revert to the previous behavior and only use the Object_FromNestedLists code when an error occurs and the user explicitly requested an object array. The downside is that you can not place empty lists (or tuples) as objects in an object-array construct. as you could before. Given the trouble people had with the "feature," it seems wise to use it only when previous code would have raised an error. -Travis ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
