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)]))

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

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