Converting time efficiently in Python -

i have program parsing , takes in time in microsecond format. however, when reading data, it's not pretty see 10000000000 microseconds. x seconds, or x minutes, looks better.

so.. built this:

def convert_micro_input(micro_time):     t = int(micro_time)     if t<1000: #millisecond         return str(t) +' us'     elif t<1000000: #second         return str(int(t/1000))         +   ' ms'     elif t<60000000: #is second         return str(int(t/1000000))      +   ' second(s)'     elif t<3600000000:         return str(int(t/60000000))     +   ' minute(s)'     elif t<86400000000:         return str(int(t/3600000000))   +   ' hour(s)'     elif t<604800000000:         return str(int(t/86400000000))  +   ' day(s)'     else:         print 'exceeded time conversion possibilities'         return none 

now, in eyes, looks fine, however, boss wasn't satisfied. said numbers confusing in terms of readability if come edit in year , said make happen in while loop.

so, being said. under these constraints, wondering @ how implement same logic more readable (maybe using python equivalent of macro) form , put in while loop.

thanks everyone.

python has facility built itself

from datetime import timedelta t in all_times_in_us:     print timedelta(seconds=t/1000000.0) 

taking advantage of easiest(and readable) way think. said if want can make more readable defining constants @ top (or in time_util.py file or something)

microsecond=1 millisecond=microsecond*1000 second=ms*1000 minute=second*60 hour=minute*60 day=hour*24 week=day*7 

and use these values instead way clear are

eg

if t < millisecond:      return "{time} us".format(time=t) elif t < second:     return  "{time} ms".format(time=t//millisecond) elif t < minute:     return  "{time} seconds".format(time=t//second) ...