关于virtualenv和python版本？

Question

I need help in understanding with venv. I have installed venv with virtualenv venv -p python3.6. I have activated it (venv) and install django

pip django`install django`

And so, when I work with my project should I always activate venv or not? Because I run my manage.py without venv and using python2, but I need python3. And then I run with active venv with python3 I got mistakes like this:

ModuleNotFoundError: No module named 'forms'

Answer 1

I also use python3.5.2 and I created a virtual environment using the following command

python3 -m venv venv

And activated it using the following command

. venv/bin/activate

I always activate the virtual environment before running the application

Answer 2

您必须在调用pip install ... （可能在Python 3.x中使用pip3 ）之前以及每次需要使用virtualenv时（例如，在调用python manage.py ...之前）激活virtualenv python manage.py ...