A problem with Time

**Shawn Milochik** · Aug 16 '07, 03:45 PM

Re: A problem with Time

import time

oneDay = 60 * 60 * 24 #seconds in one day

date = time.time()

yesterday = date - oneDay

**Diez B. Roggisch** · Aug 16 '07, 03:55 PM

Re: A problem with Time

special_dragonf ly schrieb:

Hello,
>
I need to return the date yesterday in the form DDMMYYYY. I looked through
the modules: time, datetime and calendar but can't find anything that leaps
out at me.
>
The problem I'm having is that although I can use time.localtime and get a
tuple of the year, month, day and so forth, I don't believe I can just minus
1 from the day, because I don't think it's cyclic, also, I can't see the
date being linked in with the month.
>
So is there any way of getting yesterdays date?

RTFM is the answer...

import datetime
today = datetime.date.t oday()
yesterday = today - datetime.timede lta(days=1)
print yesterday

Diez

**Neil Cerutti** · Aug 16 '07, 04:05 PM

Re: A problem with Time

On 2007-08-16, Shawn Milochik <Shawn@Milochik .comwrote:

import time
>
>
oneDay = 60 * 60 * 24 #seconds in one day
>
date = time.time()
>
yesterday = date - oneDay

Or use a timedelta.

>>import datetime
>>yesterday = datetime.dateti me.today() - datetime.timede lta(days=1)
>>yesterday.str ftime('%m%d%Y')

'08152007'

--
Neil Cerutti
It might take a season, it might take half a season, it might take a year.
--Elgin Baylor

**Gary Herron** · Aug 16 '07, 04:15 PM

Re: A problem with Time

special_dragonf ly wrote:

Hello,
>
I need to return the date yesterday in the form DDMMYYYY. I looked through
the modules: time, datetime and calendar but can't find anything that leaps
out at me.
>
The problem I'm having is that although I can use time.localtime and get a
tuple of the year, month, day and so forth, I don't believe I can just minus
1 from the day, because I don't think it's cyclic, also, I can't see the
date being linked in with the month.
>
So is there any way of getting yesterdays date?
>
Thank You
>
Dominic
>
>
>

Here's how I'd do it:

>>import time
>>secondsPerD ay = 24*60*60
>>today = time.time()
>>yesterday = today - secondsPerDay
>>print time.strftime(" %d%m%Y",time.lo caltime(today))

16082007

>>print time.strftime(" %d%m%Y",time.lo caltime(yesterd ay))

15082007

Gary Herron

**BartlebyScrivener** · Aug 16 '07, 05:35 PM

Re: A problem with Time

On Aug 16, 10:54 am, "Diez B. Roggisch" <de...@nospam.w eb.dewrote:

RTFM is the answer...

I don't know. I remember scratching my head for a day or two over the
module explanations and instructions until I found a little howto with
a lot of explicite examples.

Dates and Times

http://pleac.sourceforge.net/pleac_python/datesandtimes.html

rd

**MRAB** · Aug 16 '07, 07:55 PM

Re: A problem with Time

On Aug 16, 4:30 pm, "special_dragon fly" <Domi...@PLEASE ASK.co.uk>
wrote:

Hello,
>
I need to return the date yesterday in the form DDMMYYYY. I looked through
the modules: time, datetime and calendar but can't find anything that leaps
out at me.
>
The problem I'm having is that although I can use time.localtime and get a
tuple of the year, month, day and so forth, I don't believe I can just minus
1 from the day, because I don't think it's cyclic, also, I can't see the
date being linked in with the month.
>
So is there any way of getting yesterdays date?
>

As well as the other replies, this also works (as far as I can tell!):

import time
today = time.localtime( )
yesterday = today[ : 2] + (today[2] - 1, ) + today[3 : ]
yesterday = time.localtime( time.mktime(yes terday))

**Dick Moores** · Aug 19 '07, 10:05 PM

Re: A problem with Time

At 08:30 AM 8/16/2007, special_dragonf ly wrote:

>Hello,
>
>I need to return the date yesterday in the form DDMMYYYY. I looked through
>the modules: time, datetime and calendar but can't find anything that leaps
>out at me.
>
>The problem I'm having is that although I can use time.localtime and get a
>tuple of the year, month, day and so forth, I don't believe I can just minus
>1 from the day, because I don't think it's cyclic, also, I can't see the
>date being linked in with the month.
>
>So is there any way of getting yesterdays date?

The question has already been well-answered, but since I've found
using the datetime module to be tough going, I was wondering if
either of these would be easier to understand and use:
1. <http://www.egenix.com/products/python/mxBase/mxDateTime/>
I see that mxDateTime comes with a 55-page manual as a PDF.

2. <http://labix.org/python-dateutil>

Dick Moores

A problem with Time

A problem with Time

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