[NEST Users] Re: Strange interaction between NEST and IPython

I am not a python expert, but same behaviour here ... NEST 3.6 (git master HEAD from february 12), Python 3.8.12, Rocky Linux 8.5 Xavier ________________________________ From: Hans Ekkehard Plesser &lt;hans.ekkehard.plesser(a)nmbu.no&gt; Sent: Friday, March 8, 2024 3:24 PM To: users(a)nest-simulator.org &lt;users(a)nest-simulator.org&gt; Subject: [NEST Users] Strange interaction between NEST and IPython Dear Python experts among the NEST Users! I just notice a strange interaction between NEST and Ipython. In a freshly started Ipython, I execute the following three statements import nest n = nest.Create('parrot_neuron', positions=nest.spatial.free([(x, 0) for x in range(10000)])) n The last one takes extraordinarily long, over 10 seconds, I think. But if I instead do print(n) it executes instantaneously. Also, if I do the same thing in python directly, just entering n shows the NodeCollection immediately. Can anyone reproduce this and does anyone have an idea what might be going on? I am on macOS 14.3.1 with Python 3.12.2, Ipython 8.22.2, and have checked with NEST 3.6 and a branch of recent master. Best, Hans Ekkehard -- Prof. Dr. Hans Ekkehard Plesser Department of Data Science Faculty of Science and Technology Norwegian University of Life Sciences PO Box 5003, 1432 Aas, Norway Phone +47 6723 1560 Email hans.ekkehard.plesser@nmbu.no<mailto:hans.ekkehard.plesser@nmbu.no> Home http://arken.nmbu.no/~plesser Computer Vision Center<http://www.cvc.uab.cat> CONFIDENTIALITY WARNING<http://www.cvc.uab.es/?page_id=7475>