Time String Parser (Python)

time_str_to_delta.py

import re

def time_str_to_time_delta(stime: str):
    match_days = re.search('([0-9]+)d', stime)
    match_hrs  = re.search('([0-9]+)h', stime)
    match_mins = re.search('([0-9]+)m', stime)
    match_secs = re.search('([0-9]+)s', stime)
    def int_from_match(match) -> int:
        out = 0
        if (match != None):
            out = int(match.group(1))
        return out

    idays = int_from_match(match_days)
    ihrs  = int_from_match(match_hrs)
    imins = int_from_match(match_mins)
    isecs = int_from_match(match_secs)

    totalsecs = (idays * (60 * 60 * 24)) + (ihrs * (60 * 60)) + (imins * 60) + isecs
    if (totalsecs == 0):
        print("ERR: No time specified for tempmute command.")
    else:
        print ("d/h/m/s")
        print ('%i/%i/%i/%i' % (idays, ihrs, imins, isecs), end=" - ")
        print('(%s secs)' % totalsecs)

if __name__ == '__main__':
    while(True):
        i = input("Enter a time string (ex: 2d 10h 4m 3s) to start. (q to quit)\n")
        if (i == 'q'):
            break
        time_str_to_time_delta(i)