title: Upgrading Python to 3.7 inside venv?
body: <p>How can I upgrade the current <code>Python</code> interpreter inside a <code>venv</code> to v3.7.1. Unfortunately 3.5.2 is out of date for some libraries I use, so I want to switch to 3.7.1.</p>
  
  <p>Option 1: is to update the interpreter inside my venv.</p>
  
  <p>Option 2: is to create a new venv with Python 3.7.1 as its interpreter and deploy the whole project with all its dependencies and tweaks anew?</p>
  
  <p>What is the typical way to port a Flask application to a newer interpreter?</p>