无法在virtualenv中导入模块

Question

I'm trying to learn flask. I have created a virtualenv and am using the hello.py example file as in here .

For reference, the contents of hello.py is as follows:

from flask import Flask
app = Flask(__name__)

@app.route("/")
def hello():
    return "Hello World!"

if __name__ == "__main__":
    app.run()

I can run the file and it creates a functioning web application.

So now I've created a unit test file in the same directory as hello.py and it imports hello. The code for this file is as follows:

import os
import hello
import unittest

class FlaskrTestCase(unittest.TestCase):

    def setUp(self):
        self.app = hello.app.test_client()

if __name__ == '__main__':
    unittest.main()

When I run the unit test file it attempts to execute hello.py and fails with:

ImportError: No module named flask.

What am I missing?

Answer 1

It seems you have not activated your virtualenv yet, use the source virtualenv/bin/activate command to activate.

Relevant documentation: http://docs.python-guide.org/en/latest/dev/virtualenvs/