Tail -f for windows(Source code, exe file, and a video)

When you are a Linux user who uses the "tail -f" command a lot, and switching to windows for some reasons(temporarily of course ) you will feel the absence of this useful command.

tail

as the name of command somehow implies, it has something to do with the end of the file, by using tail you can read n lines of end of a file and you can monitor lines appending to end of file.

my reaction to the absence of tail command

as I was sitting behind my computer and mourning over the tail command , I got to the idea of writing my own tail command(actually I did some searches and saw some sources as alternatives for tail but I had some time to kill, so I decided to write it myself).

below is my code in python 3, it is not that perceptional, I didn't spend that much time on it , so it could be handled better(feel free to edit it and make it better).
the way it works is that you simply throw a file at it and it is going to show you any line appending to the end of the file.

link for exe file, it is compressed in .rar

https://www.dropbox.com/s/en2phublxa5iyx7/Tail.rar?dl=0

1. Download the file
2. unzip it
3. open a cmd
4. execute tail.exe with a file name as parameter

example:

D:\Python\Tail\tail.exe E:\seclog.txt

the source code written in python 3.x

import signal
import sys
from optparse import OptionParser
last = 0
sleepInterval = 1.0


def signal_handler(signal, frame):
        while True:
           print()
           print("Thank you guys for using this tool")
           print()
           print("@meysam")
           print("steemit.com")
           sys.exit(0)
signal.signal(signal.SIGINT, signal_handler)

def rl_t_tail(mey):
    global last
    while True:
        line = mey.readline()
        if line:
            if last == 1:
                yield line
        else:
            last = 1
            tail(mey)

def tail(mey):
    while True:
        end = mey.tell()
        line = mey.readline()
        if not line:
            time.sleep(sleepInterval)
            mey.seek(end)
        else:
            yield line

def main():
    f = OptionParser("usage: tail.py file")
    (options, args) = f.parse_args()
    if len(args) < 1:
        f.error("Specify a file first")
    with open(args[0], 'r') as mey:
        for line in rl_t_tail(mey):
            print(line.rstrip("\n"))

if __name__ == '__main__':
    main()
##@meysam 

this is a short video of how it works

Thanks for reading my post, your feedback means a lot to me :)

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Fri Jan 20 14:57:04 IRST 2017