title: Python: I need to find the average over x amount of rows in a specific column of a large csv file
body: <p>I have a large CSV file with two columns in it as shown below:</p>
  <p><a href="https://i.stack.imgur.com/FZc1D.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FZc1D.png" alt="enter image description here" /></a></p>
  <p>I have already filtered the data. I need to calculate the average pressure every x amount  of rows.</p>
  <p>I've looked for a while on here but was unable to find how to calculate the average every x amount of rows for a specific column. Thanks for any help you can provide.</p>