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Re: Using Python for date calculations

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On 21/11/2014 08:50, Gary Herron wrote:
> On 11/21/2014 12:35 AM, Steve Hayes wrote:
>> I've finally found a use for Python.
>>
>> When, in the course of my genealogy research, I look at census or burial
>> records, I often want to work out a person's date of birth from their
>> age.
>> It's a simple matter of mental arithmetic, but I sometimes get it
>> wrong, and
>> mislead myself. There are calculators and date calculation programs,
>> but they
>> are usually too complicated and try to do too much, so by the time you've
>> worked out what to do it takes much longer.
>>
>> This Python script does it for me.
>>
>> year = input("Year: ")
>> age = input("Age: ")
>> born = year-age
>> print 'Year of birth:', born
>>
>> It's so simple, so elementary, that it's not really worth writing about,
>> except for the fact that it illustrates the KISS principle.
>>
>> It is sometimes better to have a simple program that does one thing
>> well than
>> a complex one that does lots of things, but none of them very
>> efficiently.
>>
>> The average hand calculator can do the same job, but you have to pick
>> it up
>> and put it down, and you can't easily see if you've made a typo.
>>
>> Having said that, however, yes, I would perhaps like to use Python for
>> more
>> complicated date processing routines, namely to convert the kinds of
>> dates
>> produced by genealogy programs to a simple yyyy-mm-dd that computer
>> database
>> programs can understand, so that "Abt May 1677" would be rendered as
>> "1677-05-00"
>>
>> Has anyone done something like that in Python?
>>
>>
>>
>
> The datetime module has lots of capabilities including the several you
> mention.
>
> See  https://docs.python.org/2/library/datetime.html
>
> Gary Herron
>

As we're now firmly heading into the Python 3 era would people please be 
kind enough to use the Python 3 links.  I know it's only a single 
character change but it's the principle to me.  TIA.

-- 
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence

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Thread

Using Python for date calculations Steve Hayes <hayesstw@telkomsa.net> - 2014-11-21 10:35 +0200
  Re: Using Python for date calculations Chris Angelico <rosuav@gmail.com> - 2014-11-21 19:40 +1100
    Re: Using Python for date calculations Steve Hayes <hayesstw@telkomsa.net> - 2014-11-21 12:15 +0200
      Re: Using Python for date calculations Chris Angelico <rosuav@gmail.com> - 2014-11-21 21:18 +1100
      Re: Using Python for date calculations alister <alister.nospam.ware@ntlworld.com> - 2014-11-21 10:33 +0000
        Re: Using Python for date calculations Chris Angelico <rosuav@gmail.com> - 2014-11-21 21:47 +1100
        Re: Using Python for date calculations random832@fastmail.us - 2014-11-21 08:54 -0500
          Re: Using Python for date calculations alister <alister.nospam.ware@ntlworld.com> - 2014-11-21 14:54 +0000
        Re: Using Python for date calculations random832@fastmail.us - 2014-11-21 08:58 -0500
          Re: Using Python for date calculations Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-22 01:55 +1100
            Re: Using Python for date calculations Ned Batchelder <ned@nedbatchelder.com> - 2014-11-21 10:25 -0500
        Re: Using Python for date calculations Chris Angelico <rosuav@gmail.com> - 2014-11-22 01:08 +1100
      Re: Using Python for date calculations Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-11-21 14:50 -0500
        Re: Using Python for date calculations Steve Hayes <hayesstw@telkomsa.net> - 2014-11-22 07:07 +0200
          Re: Using Python for date calculations Chris Angelico <rosuav@gmail.com> - 2014-11-22 16:13 +1100
  Re: Using Python for date calculations Gary Herron <gary.herron@islandtraining.com> - 2014-11-21 00:50 -0800
  Re: Using Python for date calculations Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-11-21 10:20 +0000
    Re: Using Python for date calculations alister <alister.nospam.ware@ntlworld.com> - 2014-11-21 10:38 +0000
    Re: Using Python for date calculations Steve Hayes <hayesstw@telkomsa.net> - 2014-11-21 17:50 +0200
      Re: Using Python for date calculations Mark Lawrence <breamoreboy@yahoo.co.uk> - 2014-11-21 16:01 +0000
  Re: Using Python for date calculations Chris Angelico <rosuav@gmail.com> - 2014-11-21 21:27 +1100
  Re: Using Python for date calculations duncan smith <buzzard@invalid.invalid> - 2014-11-21 17:03 +0000
    Re: Using Python for date calculations Steve Hayes <hayesstw@telkomsa.net> - 2014-11-21 21:48 +0200
      Re: Using Python for date calculations Dennis Lee Bieber <bieber.genealogy@earthlink.net> - 2014-11-21 15:32 -0500
  Re: Using Python for date calculations Dennis Lee Bieber <bieber.genealogy@earthlink.net> - 2014-11-21 14:35 -0500
    Re: Using Python for date calculations Paul Blair <p.blair@internode.on.net> - 2014-11-22 06:51 +1100
      Re: Using Python for date calculations Steve Hayes <hayesstw@telkomsa.net> - 2014-11-22 07:31 +0200
    Re: Using Python for date calculations Denis Beauregard <denis.b-at-francogene.com@fr.invalid> - 2014-11-21 15:07 -0500
      Re: Using Python for date calculations Steve Hayes <hayesstw@telkomsa.net> - 2014-11-22 07:34 +0200

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