Read time and date from a text file

[huisky]

On Nov 24, 2:09 pm, Peter Otten <__pete... at web.de> wrote:
> huisky wrote:
> > As a newbie, I posted my question here again.
> > say i have two dics read from a text file by 'split'.
>
> Please don't start a new thread when you are still asking about the same
> topic.
>
> >>>> cstart
>
> > defaultdict(<type 'int'>, {15424: ['Dec', '6', '18:57:40'], 552:
> > ['Dec', '7', '09:31:00'], 15500: ['Dec', '6', '20:17:02'], 18863:
> > ['Dec', '7', '13:14:47'], 18291: ['Dec', '6', '21:01:17'], 18969:
> > ['Dec', '7', '14:28:42'], 18937: ['Dec', '7', '14:21:34']})
> >>>> ccompl
>
> > defaultdict(<type 'int'>, {15424: ['Dec', '6', '19:42:55'], 18291:
> > ['Dec', '6', '21:01:28'], 15500: ['Dec', '6', '20:26:03'], 18863:
> > ['Dec', '7', '13:24:07']})
>
> I think you should use a normal dict. A default value of 0 doesn't make much
> sense here.
>
> > and I need to calculate the difference time if the key value is the
> > same in both dics.
>
> > Someone suggested me to use the module 'datetime', but I'm still
> > wondering how to make it work.
> > I mean how to assign ['Dec','6','21:01:17'] to a 'datetime' object and
> > then do the datetime operation.
> >>>>time=datetime.datetime(cstart[18291])       does NOT work.
>
> Chris Rebert also suggested that you use the strptime() method. To spell it
> out a bit:
>
> >>> s = " ".join(cstart[18291])
> >>> s
> 'Dec 6 21:01:17'
> >>> datetime.datetime.strptime(s, "%b %d %H:%M:%S")
>
> datetime.datetime(1900, 12, 6, 21, 1, 17)
>
> You can learn about the format codes here:
>
> http://docs.python.org/library/time.html#time.strftime
>
> Note that strptime() assumes 1900 as the year which may lead to errors in
> leapyears and when start and completion time are in different years.
>
> Peter

Thanks a lot, Peter.
It helps a lot!
I see the problem of year. But the question is the source file does
NOT provide the year information.
for instance if i have one record as ['Dec','6','21:01:17'], and the
other as ['Jan','6','21:01:17']
these two records may be in different year. Will it be a problem to
use the 'datetime' do the time difference calculation?

regards

Huisky

Huisky