Python格式的timedelta大于24小时，仅显示小时？

Question

我如何格式化大于24小时的timedelta以在Python中仅包含小时显示？

>>> import datetime
>>> td = datetime.timedelta(hours=36, minutes=10, seconds=10)
>>> str(td)
'1 day, 12:10:10'

# my expected result is:
'36:10:10'

我通过以下方式达到目标：

import datetime

td = datetime.timedelta(hours=36, minutes=10, seconds=10)
seconds = td.total_seconds()
hours = seconds // 3600
minutes = (seconds % 3600) // 60
seconds = seconds % 60

str = '{}:{}:{}'.format(int(hours), int(minutes), int(seconds))

>>> print(str)
36:10:10

有没有更好的办法？

Answer 1

可能定义继承的类datetime.timedelta会更优雅一些

class mytimedelta(datetime.timedelta):
   def __str__(self):
      seconds = self.total_seconds()
         hours = seconds // 3600
         minutes = (seconds % 3600) // 60
         seconds = seconds % 60
         str = '{}:{}:{}'.format(int(hours), int(minutes), int(seconds))
         return (str)

td = mytimedelta(hours=36, minutes=10, seconds=10)

>>> str(td)
prints '36:10:10'