Time

**HMS Surprise** · May 11 '07, 08:55 PM

Re: Time

>
Could you point to an example of a python time_t struct?
>

Or maybe that should be a tm struct???

**HMS Surprise** · May 11 '07, 09:55 PM

Re: Time

Sorry, reading a little closer I see that the time tuple is apparently
an ordinary list.

jvh

**John Machin** · May 11 '07, 11:55 PM

Re: Time

On May 12, 7:46 am, HMS Surprise <j...@datavoice int.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.dateti me.strptime(s, fmt)
>>d1

datetime.dateti me(2007, 5, 11, 15, 30)

>>d2 = datetime.dateti me(2007, 5, 1)
>>d2

datetime.dateti me(2007, 5, 1, 0, 0)

>>delta = d1 - d2
>>delta

datetime.timede lta(10, 55800)

>>days_diff = delta.days + delta.seconds / 60. / 60. / 24.
>>days_diff

10.645833333333 334

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

**HMS Surprise** · May 14 '07, 02:05 PM

Re: Time

Thanks for posting. I sure am sorry that I wasted your time. I should
have started the post stating I am using jython 2.2.3 and apparently
it has no datetime module. But I will keep datetime in mind for future
reference.

Since I had no datetime I cobbled out the following. Seems to work
thus far. Posted here for the general amusement of the list.

Regards,

jvh

~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~

from time import *
s = '05/11/2007 1:23 PM'
t = s.split()
mdy = t[0].split('/')

hrMn = t[1].split(':')
if t[2] == 'PM':
hrMn[0] = int(hrMn[0]) + 12

tuple =(int(mdy[2]), int(mdy[0]), int(mdy[1]), hrMn[0], int(hrMn[1]),
0,0,0,0)
print tuple

eTime = mktime(tuple)
print 'eTime', eTime

**kyosohma@gmail.com** · May 14 '07, 02:15 PM

Re: Time

On May 14, 9:00 am, HMS Surprise <j...@datavoice int.comwrote:

Thanks for posting. I sure am sorry that I wasted your time. I should
have started the post stating I am using jython 2.2.3 and apparently
it has no datetime module. But I will keep datetime in mind for future
reference.
>
Since I had no datetime I cobbled out the following. Seems to work
thus far. Posted here for the general amusement of the list.
>
Regards,
>
jvh
>
~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~
>
from time import *
s = '05/11/2007 1:23 PM'
t = s.split()
mdy = t[0].split('/')
>
hrMn = t[1].split(':')
if t[2] == 'PM':
hrMn[0] = int(hrMn[0]) + 12
>
tuple =(int(mdy[2]), int(mdy[0]), int(mdy[1]), hrMn[0], int(hrMn[1]),
0,0,0,0)
print tuple
>
eTime = mktime(tuple)
print 'eTime', eTime

Since jython works with Java, why not use Java's time/datetime
modules? Various links abound. Here are a few:

Date and Time Difference in Java

http://www.raditha.com/blog/archives/000552.html

The site with the lamp

java.util.Date Difference In Days

http://www.xmission.com/~goodhill/dates/deltaDates.html

404 Not Found

http://www.velocityreviews.com/forums/t149657-find-difference-in-datetime-variables.html

Maybe those will give you some hints.

Mike

**HMS Surprise** · May 14 '07, 02:25 PM

Re: Time

if t[2] == 'PM':
hrMn[0] = int(hrMn[0]) + 12
>

Oops, should be:
hrMn[0] = int(hrMn[0]
if t[2] == 'PM':
hrMn[0] += 12

**HMS Surprise** · May 14 '07, 02:35 PM

Re: Time

On May 14, 9:09 am, kyoso...@gmail. com wrote:

On May 14, 9:00 am, HMS Surprise <j...@datavoice int.comwrote:
>
>
>

Thanks for posting. I sure am sorry that I wasted your time. I should
have started the post stating I am using jython 2.2.3 and apparently
it has no datetime module. But I will keep datetime in mind for future
reference.

>

Since I had no datetime I cobbled out the following. Seems to work
thus far. Posted here for the general amusement of the list.

>

Regards,

>

jvh

>

~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~

>

from time import *
s = '05/11/2007 1:23 PM'
t = s.split()
mdy = t[0].split('/')

>

hrMn = t[1].split(':')
if t[2] == 'PM':
hrMn[0] = int(hrMn[0]) + 12

>

tuple =(int(mdy[2]), int(mdy[0]), int(mdy[1]), hrMn[0], int(hrMn[1]),
0,0,0,0)
print tuple

>

eTime = mktime(tuple)
print 'eTime', eTime

>
Since jython works with Java, why not use Java's time/datetime
modules? Various links abound. Here are a few:
>
http://www.raditha.com/blog/archives...erence-in-date...
>
Maybe those will give you some hints.
>
Mike

Excellent idea.

Thanks Mike.

jvh

**HMS Surprise** · May 14 '07, 02:35 PM

Re: Time

On May 14, 9:22 am, HMS Surprise <j...@datavoice int.comwrote:

if t[2] == 'PM':
hrMn[0] = int(hrMn[0]) + 12

>
Oops, should be:
hrMn[0] = int(hrMn[0]
if t[2] == 'PM':
hrMn[0] += 12

Oops +=1, should be:
hrMn[0] = int(hrMn[0]
if t[2] == 'PM':
hrMn[0] += 12

Need more starter fluid, coffee please!!!

**Gabriel Genellina** · May 14 '07, 06:45 PM

Re: Time

En Mon, 14 May 2007 11:27:35 -0300, HMS Surprise <john@datavoice int.com>
escribió:

On May 14, 9:22 am, HMS Surprise <j...@datavoice int.comwrote:
>
Oops +=1, should be:
hrMn[0] = int(hrMn[0]
if t[2] == 'PM':
hrMn[0] += 12
>
Need more starter fluid, coffee please!!!

Still won't work for 12 AM nor 12 PM...

--
Gabriel Genellina

**Grant Edwards** · May 14 '07, 07:25 PM

Re: Time

On 2007-05-14, Gabriel Genellina <gagsl-py2@yahoo.com.a rwrote:

En Mon, 14 May 2007 11:27:35 -0300, HMS Surprise <john@datavoice int.com>
escribió:
>

>On May 14, 9:22 am, HMS Surprise <j...@datavoice int.comwrote:
>>
>Oops +=1, should be:
> hrMn[0] = int(hrMn[0]
> if t[2] == 'PM':
> hrMn[0] += 12
>>
>Need more starter fluid, coffee please!!!

>
Still won't work for 12 AM nor 12 PM...

Do you mean 12 Noon or 12 Midnight? 12AM and 12PM don't exist,
do they?

--
Grant Edwards grante Yow! HELLO, everybody,
at I'm a HUMAN!!
visi.com

**Grant Edwards** · May 14 '07, 07:25 PM

Re: Time

On 2007-05-14, Grant Edwards <grante@visi.co mwrote:

On 2007-05-14, Gabriel Genellina <gagsl-py2@yahoo.com.a rwrote:

>En Mon, 14 May 2007 11:27:35 -0300, HMS Surprise <john@datavoice int.com>
>escribió:
>>

>>On May 14, 9:22 am, HMS Surprise <j...@datavoice int.comwrote:
>>>
>>Oops +=1, should be:
>> hrMn[0] = int(hrMn[0]
>> if t[2] == 'PM':
>> hrMn[0] += 12
>>>
>>Need more starter fluid, coffee please!!!

>>
>Still won't work for 12 AM nor 12 PM...

>
Do you mean 12 Noon or 12 Midnight? 12AM and 12PM don't exist,
do they?

Midnight And Noon - an Astronomy Net Article

http://www.astronomy.net/articles/13/

Midnight And Noon - an Astronomy Net Article

--
Grant Edwards grante Yow! I am a jelly donut.
at I am a jelly donut.
visi.com

**Gabriel Genellina** · May 14 '07, 09:15 PM

Re: Time

En Mon, 14 May 2007 16:20:27 -0300, Grant Edwards <grante@visi.co m>
escribió:

>>>On May 14, 9:22 am, HMS Surprise <j...@datavoice int.comwrote:
>>>>
>>>Oops +=1, should be:
>>> hrMn[0] = int(hrMn[0]
>>> if t[2] == 'PM':
>>> hrMn[0] += 12
>>>>
>>>Need more starter fluid, coffee please!!!
>>>
>>Still won't work for 12 AM nor 12 PM...

>>
>Do you mean 12 Noon or 12 Midnight? 12AM and 12PM don't exist,
>do they?

>
http://www.astronomy.net/articles/13/

No. Even ignoring that exact instant at Noon or Midnight, 12:01 PM
translates into itself, 12:01, on a 24 hr clock; and 12:01 AM becomes 0:01
on a 24 hr clock. For hours between 01 PM and 11 PM, yes, you can follow
the rule "add 12".

--
Gabriel Genellina

**HMS Surprise** · May 14 '07, 10:15 PM

Re: Time

>
Do you mean 12 Noon or 12 Midnight? 12AM and 12PM don't exist,
do they?
>

>>t = (2007, 5, 14, 12, 0,0,0,0,0)
>>strftime('%p' , t)

'PM'

>>t = (2007, 5, 14, 0,0,0,0,0,0)
>>strftime('%p' , t)

'AM'

>>>

Time

Time

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