No module named 'stix2'

Question

I Installed stix2 by pip install stix2

It was working but I had to restart the system because I was having some touchpad issues/erratic pointer. After rebooting the system, I started getting ModuleNotFoundError.

So I uninstalled and reinstalled stix2. Thus when I "pip install stix2" now it says "Requirement already satisfied". pip list also shows stix2. But python can't import it still.

>>> import stix2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'stix2'