问题
I am trying to have some clever dates since a post has been made on my site ("seconds since, hours since, weeks since, etc..") and I'm using datetime.timedelta difference between utcnow and utc dated stored in the database for a post.
Looks like, according to the docs, I have to use the days attribute AND the seconds attribute, to get the fancy date strings I want.
Can't I just get in whatever time unit I want the value of the entire difference? Am I missing something?
It would be perfect if I could just get the entire difference in seconds.
回答1:
It seems that Python 2.7 has introduced a total_seconds() method, which is what you were looking for, I believe!
回答2:
You can compute the difference in seconds.
total_seconds = delta.days * 86400 + delta.seconds
No, you're no "missing something". It doesn't provide deltas in seconds.
回答3:
It would be perfect if I could just get the entire difference in seconds.
Then plain-old-unix-timestamp as provided by the 'time' module may be more to your taste.
I personally have yet to be convinced by a lot of what's in 'datetime'.
回答4:
Like bobince said, you could use timestamps, like this:
# assuming ts1 and ts2 are the two datetime objects
from time import mktime
mktime(ts1.timetuple()) - mktime(ts2.timetuple())
Although I would think this is even uglier than just calculating the seconds from the timedelta object...
来源：https://stackoverflow.com/questions/500168/pythons-timedelta-cant-i-just-get-in-whatever-time-unit-i-want-the-value-of-t