CallTimers

path = 'talk.txt'   #pathを書き換えてください
with open(path,encoding='utf-8') as f:
    lines = f.readlines()
lines_strip = [line.strip() for line in lines]
l_call = [line for line in lines_strip if '☎ 通話時間 ' in line]
timeSum = 0
for callLog in l_call:
    timeText = callLog.split('☎ 通話時間 ')[1]
    time = reversed(timeText.split(':'))
    n=0
    for i in time:
        timeSum += int(i)*(60**n)
        n+=1
print(timeSum/3600,"hour")