title: Whats the unit (bytes, MB, ...) that this python function returns?
body: <p>Very quick question. I've been using this function in python to get RAM usage:</p>
  <pre><code>total_memory, used_memory, free_memory = map(int, os.popen('free -t -m').readlines()[-1].split()[1:])
  </code></pre>
  <p>Do you know if the answer it gives back is in bytes or MB or something else?</p>