On May 12, 7:46 am, HMS Surprise <j...@datavoiceint.comwrote:
[first message]
HS ==I need to convert the string below into epoch seconds so that I
can
perform substractions and additions.
JM ==I presume you mean "seconds since the epoch". You don't need to
do that.
HS ==I assume I will need to break it
up into a time_t struct and use mktime.
JM ==You assume wrongly. The time module exists (IMVHO) solely as a
crutch for people who are converting C etc code that uses the time.h
functions from the C standard library. If you are starting off from
scratch, use the Python datetime module -- especially if you need to
store and manipulate pre-1970 dates; e.g. the date of birth of anyone
aged more than about 37.5 years :-)
HS ==Two questions if you will
please:
Is there a way to use multiple separator characters for split similar
to awk's [|] style?
JM ==Only if you can find such a way in the manual.
HS ==Could you point to an example of a python time_t struct?
JM ==Python doesn't have that; it's a C concept
HS ==05/11/2007 15:30
[second message]
HS== Could you point to an example of a python time_t struct?
Or maybe that should be a tm struct???
JM ==See previous answer.
[third message]
HS ==Sorry, reading a little closer I see that the time tuple is
apparently
an ordinary list.
JM ==Huh? A tuple is a tuple. A tuple is not a list, not even a very
extraordinary one.
If you are desperate to use the time module, try this:
>>import time
s = "05/11/2007 15:30"
fmt = "%m/%d/%Y %H:%M"
# Given the current date, I'm presuming that your example indicates
that you adhere to the "month-first-contrary-to-common-sense"
religion :-)
>>time.strptime(s, fmt)
(2007, 5, 11, 15, 30, 0, 4, 131, -1)
otherwise:
>>import datetime
d1 = datetime.datetime.strptime(s, fmt)
d1
datetime.datetime(2007, 5, 11, 15, 30)
>>d2 = datetime.datetime(2007, 5, 1)
d2
datetime.datetime(2007, 5, 1, 0, 0)
>>delta = d1 - d2
delta
datetime.timedelta(10, 55800)
>>days_diff = delta.days + delta.seconds / 60. / 60. / 24.
days_diff
10.645833333333334
Do read the datetime module documentation for more info ... in
particular the timedelta object has a microseconds attribute; in
general there is a whole heap of functionality in there.
HTH,
John
