ts: Timestamping stdout

Loving data as much as I do, I like to optimize things. To make sure I’m actually going the right way, it’s useful to time things. While it’s trivial in most languages to add timing, it’s even easier if you don’t have to.

To that end, here is ts, a tool for adding timestamps to each line of stdin:

#!/usr/bin/env python3

import sys
import time

def stamp(line):
    now = time.strftime("[%Y-%m-%d %H:%M:%S]", time.localtime())
    sys.stdout.write('{0} {1}\n'.format(now, line.strip('\n')))
    sys.stdout.flush()

stamp('--- <ts> ---')

for line in sys.stdin:
    stamp(line)

stamp('--- </ts> ---')

For example:

$ python long-running-script.py | ts

[2015-02-25 17:05:35] --- <ts> ---
[2015-02-25 17:05:35] things
[2015-02-25 17:05:43] stuff
[2015-02-25 17:05:53] all done
[2015-02-25 17:05:53] --- </ts> ---

Whee!

If you’d like to download this or any of my other dotfiles, you can do so on on GitHub: ts.

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