Installing python3 in a python2 virtual environment

python python-2.7 python-3.x flask virtualenv

It's not recommended to mix multiple versions of Python. In fact, I don't think it's even possible.

Creating a new virtualenv isn't difficult at all:

Get the list of modules in the current virtualenv

source /path/to/current/bin/activatepip freeze > /tmp/requirements.txt

Create a new virtualenv. Either change into a suitable directory before executing the virtualenv command or give a full path.
```
deactivatevirtualenv -p python3 envname
```

Install modules

source envname/bin/activatepip install -r /tmp/requirements.txt

That's it.

CodeHunter