CODEWITHSUNDEEP
pythonflaskpython-venvpyenv
easy_c0mpany80
easy_c0mpany80

Reputation: 337

Using Flask in a virtualenv with Pyenv

Im coming back to learning Flask after doing some tutorials a few months back. I have Python 2.7 installed on my Mac but last time I installed & used Python 3 also using Pynv and I also learned how to create and use virtualenvs.

Im trying to run a small Flask app in a virtualenv with Python3 and getting 'ImportError: No module named 'flask'' error. From what I can tell the problem is that I have Flask installed under Python 2.7 as I get this when I run 'pip install flask' from within my venv: 

  Requirement already satisfied (use --upgrade to upgrade): flask in    ./venv/lib/python2.7/site-packages

However when I run 'pyenv local' with venv activated it tells me its 3.4.3, if I then run 'python my_app.py' Flask works just fine but when I run 'python3 my_app.py' I get the 'no module named flask' error.

What am I doing wrong here?

Upvotes: 2

Views: 2326

Answers (2)

Tordek
Tordek

Reputation: 10882

You need to use the toolchain for the same version: Having Flask installed for python 2 won't make it usable for python 3.

Create your virtualenv with the python 3 version (venv-py3, probably), and install packages with version 3 of pip (pip3, probably).

Upvotes: 2

xxx
xxx

Reputation: 1485

You aren't doing anything wrong. When pyenv activates the virtual environment it points 'python' to the virtualenv python executable but not 'python3'.

You can confirm this by performing these commands:

which python3
which python

Upvotes: 2

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