Python将时间字符串00:00:03转化为每天从凌晨算起的秒数

def split_time(time_str = None):
    time_str = "00:00:03"
    line = time_str.split(":")
    seconds = int(line[0])*3600 + int(line[1])*60 + int(line[2])
    print(seconds)

    return seconds
3
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