tail implementation using python
https://www.computerhope.com/unix/utail.htm
Usage: pt.py [options] filename
Options: --version show program's version number and exit
-h, --help show this help message and exit
-n NUM_OF_LINES number of lines to print
-F to monitor input realtime refreshing every # seconds
Example: python pt.py -n 10 -F error.log