title: Python time module - clock_getres(clk_id),clock_gettime(clk_id), clock_settime(clk_id, time)
body: <p>According to Python 3.5 documenation (time module) all three functions  <code>clock_getres(clk_id), clock_gettime(clk_id)</code> and <code>clock_settime(clk_id, time)</code> are available for Unix Systems. According to documentation: </p>
  
  <blockquote>
    <p><code>clock_getres(clk_id)</code>  Return the resolution (precision) of the
    specified clock <code>clk_id</code> </p>
    
    <p><code>clock_gettime(clk_id)</code> Return the time of the specified  clock <code>clk_id</code></p>
    
    <p><code>clock_settime(clk_id, time)</code> Set the time of the specified clock
    <code>clk_id</code></p>
  </blockquote>
  
  <p>But Python documenation doesn't say anything about <code>clk_id</code>.
  Can someone explain me how to get <code>clk_id</code> using python.</p>