title: Replace last but one occurance of space with comma in python
body: <p>I have this <em>string</em> below. How can I replace the last but one space without using a for loop in python.</p>
  
  <blockquote>
    <p><code>"814409014860", "BOA ", "604938XXXXXX5410 ",,"ADOM ","ADU SAVBOSS SVGIDIIADOM0001 Int. charge ","24/05/18 09:39:08 0.70 ",0.00</code></p>
  </blockquote>
  
  <p>I want to avoid for loop because the the data is huge.</p>
  
  <p>The comma is needed just after the minutes timestamp</p>
  
  <blockquote>
    <p><code>09:39:08 0.70 ",0.00</code> => <code>09:39:08, 0.70 ",0.00</code></p>
  </blockquote>
  
  <p>Python, bash, c# is preferred.</p>