I answer to your questions:
1) And I trust you ran the "pynestml.__version__" in the same notebook as the Izhikevich tutorial? Yes, I did.
2) Did you start the notebook server from a "neutral" directory (like /tmp, or home, or another place that does not itself contain a directory named "pynestml")? My 'Iz.ipynb' file, where the Iz. tutorial code is written, is located inside the 'nestml' folder that was created after the NESTML installing process. If I copy and paste 'Iz.ipynb' in another folder I obtain:
ImportError Traceback (most recent call last) <ipython-input-1-15d9cc694aa4> in <module> 5 import os 6 ----> 7 from pynestml.frontend.pynestml_frontend import generate_nest_target 8 9 NEST_SIMULATOR_INSTALL_LOCATION = nest.ll_api.sli_func("statusdict/prefix ::")
ImportError: cannot import name 'generate_nest_target' from 'pynestml.frontend.pynestml_frontend' (/root/.local/lib/python3.8/site-packages/pynestml/frontend/pynestml_frontend.py)