title: PTVS: How to reference or use Python source code in one project from a second project
body: <p>In Visual Studio with PTVS I have <strong>two separate</strong> Python projects, one contains a Python source file named <code>lib.py</code> for use as a library of functions and the other is a main that uses the functions in the library. I am using an <code>import</code> statement in the main to reference the functions in the library project but get the following error:</p>
  
  <blockquote>
    <p>No module named lib</p>
  </blockquote>
  
  <p>I primarily program in F# using Visual Studio so my mindset is adding references to other .NET projects.  </p>
  
  <p>How do I think in the Pythonic way to accomplish this?</p>