Python 3 - How to change the syntax of a "datetime.timedelta(seconds=xxx)" object?

Question

below a simple example using the Python interpreter:

>>> import datetime
>>> 
>>> time=datetime.timedelta(seconds=10)
>>> str(time)
'0:00:10'
>>>

how can I change the syntaxt of the time object when I convert it in a string? As reslt, I want to see '00:00:10' and not '0:00:10'. I really don't understand why the last zero in the hours block is missing, I want to see always two digits in each block. how can I do it?

Answer 1

You have to create your custom formatter to do this.

Python3 variant of @gumption solution which is written in python2. This is the link to his solution

Custom Formatter

from string import Template

class TimeDeltaTemp(Template):
    delimiter = "%"

def strfdtime(dtime, formats):
    day = {"D": dtime.days}
    hours, rem = divmod(dtime.seconds, 3600)
    minutes, seconds = divmod(rem, 60)
    day["H"] = '{:02d}'.format(hours)
    day["M"] = '{:02d}'.format(minutes)
    day["S"] = '{:02d}'.format(seconds)
    time = TimeDeltaTemp(formats.upper())
    return time.substitute(**day)

Usage

import datetime

time=datetime.timedelta(seconds=10)
print(strfdtime(time, '%H:%M:%S'))
time=datetime.timedelta(seconds=30)
print(strfdtime(time, '%h:%m:%s'))

Output

00:00:10
00:00:30