using pyenv and virtual environment created with venv question

[Larz60+]

Ok,

I am running OpenSuse Leap 15

I have pyenv properly (I'm quite (sort of, maybe) confident of this) running, and set up to run python 3.7.0 when I execute python from shell.
I also have a virtual environment created with:

python -m venv flaskapp

I start (or so I thought) my virtual environment without error, using (from flaskapp directory):

./bin/activate

Then run Python and pip check:

arz60p@linux-nnem:/run/media/Larz60p/Data-4TB/python/e-h/f/flaskapp/app/tools> python -V
Python 3.7.0
Larz60p@linux-nnem:/run/media/Larz60p/Data-4TB/python/e-h/f/flaskapp/app/tools> pip -V
pip 10.0.1 from /home/Larz60p/.pyenv/versions/3.7.0/lib/python3.7/site-packages/pip (python 3.7)

and it doesn't appear to be running local copy

I then run this simple script:

# Check if in virtual environment
import sys

if hasattr(sys, 'real_prefix'):
    print('Running virtual environment')
else:
    print('Not running virtual environment')

and get reply:

Larz60p@linux-nnem:/run/media/Larz60p/Data-4TB/python/e-h/f/flaskapp/app/tools> python CheckEnvironment.py 
Not running virtual environment

Why?