timeLen = "100分鐘"
if "分鐘" in timeLen:
timeLen = int(timeLen.replace("分鐘", ""))
hour = str(timeLen // 60)
minutes = str(timeLen % 60) if len(str(timeLen % 60)) == 2 else ("0" + str(timeLen % 60))
timeLen = ":".join((hour, minutes, "00"))