Python: Human readable time span given total secs

Problem:

Function takes an amount of time in seconds and returns a human readable time span.

Input: 14723 (in secs)
Output : 4h 5m 23s

Suffixes used:

y - year
w - week
d - days
h - hours
m - min
s - sec

Code:

#!/usr/bin/env python
def elapsed_time (seconds, suffixes=['y','w','d','h','m','s'], add_s=False, separator=' '):
    """
    Takes an amount of seconds and turns it into a human-readable amount of time.
    """
    # the formatted time string to be returned
    time = []

    # the pieces of time to iterate over (days, hours, minutes, etc)
    # - the first piece in each tuple is the suffix (d, h, w)
    # - the second piece is the length in seconds (a day is 60s * 60m * 24h)
    parts = [(suffixes[0], 60 * 60 * 24 * 7 * 52),
          (suffixes[1], 60 * 60 * 24 * 7),
          (suffixes[2], 60 * 60 * 24),
          (suffixes[3], 60 * 60),
          (suffixes[4], 60),
          (suffixes[5], 1)]

    # for each time piece, grab the value and remaining seconds, and add it to
    # the time string
    for suffix, length in parts:
        value = seconds / length
        if value > 0:
            seconds = seconds % length
            time.append('%s%s' % (str(value),
                           (suffix, (suffix, suffix + 's')[value > 1])[add_s]))
        if seconds < 1:
            break

    return separator.join(time)

if __name__ == '__main__':
    # 2 years, 1 week, 6 days, 2 hours, 59 minutes, 23 seconds
    # 2y 1w 6d 2h 59m 23s
    seconds = (60 * 60 * 24 * 7 * 52 * 2) + (60 * 60 * 24 * 7 * 1) + (60 * 60 * 24 * 6) + (60 * 60 * 2) + (60 * 59) + (1 * 23)
    print elapsed_time(seconds)
    print elapsed_time(seconds, [' year',' week',' day',' hour',' minute',' second'])
    print elapsed_time(seconds, [' year',' week',' day',' hour',' minute',' second'], add_s=True)
    print elapsed_time(seconds, [' year',' week',' day',' hour',' minute',' second'], add_s=True, separator=', ')

Output:

[10:13:34 gmuniyan@lnl43a-3102] /home/gmuniyan/python>./elapsedTime.py
2y 1w 6d 2h 59m 23s
2 year 1 week 6 day 2 hour 59 minute 23 second
2 years 1 week 6 days 2 hours 59 minutes 23 seconds
2 years, 1 week, 6 days, 2 hours, 59 minutes, 23 seconds

Honor: Original Post