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Re: Using Python for date calculations

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Date Fri, 21 Nov 2014 21:18:17 +1100
Subject Re: Using Python for date calculations
From Chris Angelico <rosuav@gmail.com>
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On Fri, Nov 21, 2014 at 9:15 PM, Steve Hayes <hayesstw@telkomsa.net> wrote:
> On Fri, 21 Nov 2014 19:40:22 +1100, Chris Angelico <rosuav@gmail.com> wrote:
>
>>On Fri, Nov 21, 2014 at 7:35 PM, Steve Hayes <hayesstw@telkomsa.net> wrote:
>>> This Python script does it for me.
>>>
>>> year = input("Year: ")
>>> age = input("Age: ")
>>> born = year-age
>>> print 'Year of birth:', born
>>
>>One thing to be careful of: The input() function in Python 2 should be
>>avoided. Instead, use int(raw_input("Year: ")) and correspondingly
>>Age. It's much safer and clearer than what you have, which is an alias
>>for eval(raw_input("Year: ")) - very dangerous.
>
> I though input() was OK for integers.

In Py2, input() is basically not OK for anything. On the (extremely!)
rare occasions when you actually want to eval() something the user
types, it's better to be explicit: eval(raw_input()).

ChrisA

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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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