title: Is it possible to somehow inline a function in python? ( for both performance + maintainability )
body: <h2>Is it possible to somehow inline a function in python?</h2>
  
  <p>I have a very long function in python, which I want to split up for readability in several functions. So the parts gets called only from one point, the in program, but very often.</p>
  
  <p>This reduces performance since function calls are very expensive.</p>
  
  <p>Is there a method to both maintain the unsplitted performance, while improving readability/maintainence?</p>