readlog.py

#!/usr/bin/python3
"""Reads from argument the log file name. And displays it in real time.

The default log name is log.txt (which is correct if the script is launched
from the afterbirth folder itself)
It will read each line one after the other on an infinit loop.
If the file gets updated (ie: a line is added) it will display it and
lower the reading cooldown.
If nothing happen on the reading loop, it increase the reading cooldown.

author: gibonus, /u/RGibonnus
"""
from sys import argv
from time import sleep

if len(argv) > 1:
    logloc = ' '.join(argv[1:])
else:
    logloc = 'log.txt'

f = open(logloc, 'r')
stime = 0.001
while True:
    t = f.readline()
    if t != '':
        stime = 0.001
        print(t,end='')
    else:
        stime = stime + 0.005 if stime < 1 else 1
    sleep(stime)
f.close()