title: NEST simulator:python says "ModuleNotFoundError: No module named 'nest'"
body: <p>My python version in mac is 3.8 but I need 3.7 so I create environment python 3.7, and install the nest with conda. But when I import nest, there is still the error:ModuleNotFoundError: No module named 'nest'.
  I checked the python3.7/site-packages, there is the nest:
  <img src="https://i.stack.imgur.com/2gtpW.png" alt=""></p>