title: How to use airflow in a virtual environment, with the operators running outside of a virtual env?
body: <p>I have been using airflow for the past few weeks, having installed it, its dependencies and all the requirements of the dags I need to run inside of a py 2.7 virtual env. I would like to be able to create a python 3 virtual environment, install only airflow and its dependencies inside, and then create dags with python operators that would use the python 2.7 distribution and all its libraries on my machine.</p>
  
  <p>One way that I have been thinking to do this is to only use bash operators where I specify the python version to use every time, but this doesn't seem very clean, is there any other way?</p>