这是一个对我有用的。

from datetime import datetime

date_format = "%H:%M:%S"

# You could also pass datetime.time object in this part and convert it to string.
time_start = str('09:00:00') 
time_end = str('18:00:00')

# Then get the difference here.    
diff = datetime.strptime(time_end, date_format) - datetime.strptime(time_start, date_format)

# Get the time in hours i.e. 9.60, 8.5
result = diff.seconds / 3600;

希望这能有所帮助!

import time  
current = time.time()

...job...
end = time.time()
diff = end - current

这对你有用吗?

另一种方法是使用时间戳值:

end_time.timestamp() - start_time.timestamp()

>>> from datetime import datetime

>>>  a = datetime.now()

# wait a bit 
>>> b = datetime.now()

>>> d = b - a # yields a timedelta object
>>> d.seconds
7

(7将是你在上面等待的时间)

我找到了datetime。Datetime非常有用，所以如果你遇到了复杂或尴尬的情况，请告诉我们。

编辑:感谢@WoLpH指出，人们并不总是需要如此频繁地刷新，以至于日期时间会很接近。通过计算增量中的天数，可以处理更长的时间戳差异:

>>> a = datetime(2010, 12, 5)
>>> b = datetime(2010, 12, 7)
>>> d = b - a
>>> d.seconds
0
>>> d.days
2
>>> d.seconds + d.days * 86400
172800

这是一个对我有用的。

from datetime import datetime

date_format = "%H:%M:%S"

# You could also pass datetime.time object in this part and convert it to string.
time_start = str('09:00:00') 
time_end = str('18:00:00')

# Then get the difference here.    
diff = datetime.strptime(time_end, date_format) - datetime.strptime(time_start, date_format)

# Get the time in hours i.e. 9.60, 8.5
result = diff.seconds / 3600;

希望这能有所帮助!

如果你想计算两个已知日期之间的差值，可以像这样使用total_seconds:

import datetime as dt

a = dt.datetime(2013,12,30,23,59,59)
b = dt.datetime(2013,12,31,23,59,59)

(b-a).total_seconds()

86400.0

#note that seconds doesn't give you what you want:
(b-a).seconds

0