Calculates time from any time passed format H:M:S M:S S

time_calculator.py

from datetime import timedelta
from functools import reduce
from itertools import chain, repeat
from typing import List

def calc(times: List[str]) -> timedelta:
    '''Calculates total time from the list of times'''
    
    result = timedelta()
    for t in times:
        for hms in [t.split(':')]:
            s, m, h, *_ = chain(hms[::-1], repeat('0', 3))
            result += timedelta(hours=int(h), minutes=int(m), seconds=int(s))
    return result

Example of using it
times = [
'1:2:3',
'4:5',
'6'
]
total_time = calc(times) # 1:06:14