Как с помощью модуля datetime преобразовать время в количество минут

from datetime import datetime
 
s1 = "20:12"
time1 = datetime.strptime(s1, "%H:%M")
total_minutes = time1.hour * 60 + time1.minute
print(f"Количество минут для s1: {total_minutes}")
 
s2 = "20:12:30"
time2 = datetime.strptime(s2, "%H:%M:%S")
total_seconds = time2.hour * 3600 + time2.minute * 60 + time2.second
print(f"Количество секунд для s2: {total_seconds}")

s1 = "20:12"
s2 = "20:12:30"
 
 
def count(s):
    raw = list(map(int, s.split(":")))
    return 60 * raw[0] + raw[1] if len(raw) < 3 else 3600 * raw[0] + 60 * raw[1] + raw[2]
 
 
print(count(s1))
print(count(s2))

def time_to_sec(input_time):
    """ count time in seconds from HH:MM:SS format"""
    time_list = list(map(int, input_time.split(":")))
    print(f"Time in seconds: {sum(x * 60 ** i for i, x in enumerate(reversed(time_list)))}")

s1 = "20:12"
s2 = "20:12:30"
 
 
def count(s, tp='min'):
    raw = list(map(int, s.split(":")))
    raw.append(0)
    return 60 * raw[0] + raw[1] if tp == 'min' else 3600 * raw[0] + 60 * raw[1] + raw[2]
 
 
print(count(s1, "min"))
print(count(s2, "sec"))

from datetime import timedelta as td
 
def min_sec(attr):
    arr = list(map(int,attr.split(':')))
    if len(arr) == 3:
        delta = td(hours=arr[0],minutes=arr[1],seconds=arr[2]).total_seconds()
    else:
        delta = td(hours=arr[0],minutes=arr[1]).total_seconds() / 60
    return f'{delta} {"сек." if len(arr) == 3 else "мин."}'
 
s1 = "20:12"
s2 = "20:12:30"
 
print(min_sec(s1))
print(min_sec(s2))