title: How to call a Python function from a Tcl script
body: <p>I have a Python script, say <code>pyscr.py</code>. Let's say this file defines the following function:</p>
  
  <pre><code>def f1() :
      print ('python func executing')
  </code></pre>
  
  <p>How do I call this function <code>f1</code> from a Tcl script?</p>