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Re: Help with some python homework...

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Subject Re: Help with some python homework...
From Scott W Dunning <swdunning@cox.net>
In-Reply-To <C675418B-7F7C-4DF8-A313-99C716E42FDB@cox.net>
Date Fri, 31 Jan 2014 22:19:24 -0700
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To Denis McMahon <denismfmcmahon@gmail.com>, Chris Angelico <rosuav@gmail.com>, Neil Cerutti <neilc@norwich.edu>, greg.ewing@canterbury.ac.nz
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Xref csiph.com comp.lang.python:65194

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If you’re interested in what the problem is here it is…

Suppose the cover price of a book is $24.95, but bookstores get a 40% discount. Shipping costs  $3 for the first copy and 75 cents for each additional copy. What is the total wholesale cost for 60 copies?



On Jan 31, 2014, at 10:18 PM, Scott W Dunning <swdunning@cox.net> wrote:

> Any chance you guys could help with another question I have?  Below is a code to a different problem.  The only thing I don’t understand is why when calculating the 'discounted price’ you have to subtract 1?  Thanks again guys!  
> 
> price_per_book = 24.95
> discount = .40
> quantity = 60
> discounted_price = (1-discount) * price_per_book
> shipping = 3.0 + (60 - 1) * .75
> total_price = 60 * discounted_price + shipping
> print total_price, 'Total price'
> 
> Scott 
> 
> 
> 
> On Jan 31, 2014, at 8:02 PM, Denis McMahon <denismfmcmahon@gmail.com> wrote:
> 
>> On Thu, 30 Jan 2014 21:12:19 -0800, scottwd80 wrote:
>> 
>>> Here is the question that was asked and below that I'll paste the code I
>>> have so far.
>> 
>> The following is a reasonably but not highly obfuscated short solution to 
>> the problem set in python 2.7. With a bit of luck, after each lesson of 
>> your course, you'll be able to understand a bit more of how it works.
>> 
>> M=60;H=M*60
>> def s(h,m,s): return h*H+m*M+s
>> def hms(s): return (int(s/H),int((s%H)/M),s%M)
>> (a,b,c)=hms(s(6,52,0)+3*s(0,7,12)+2*s(0,8,15))
>> print "{:02d}:{:02d}:{:02d}".format(a,b,c)
>> 
>> When you can write a short paragraph describing what each line of the 
>> program does, you'll be on your way to understanding a few of the 
>> structures, syntaxes and mechanisms of python.
>> 
>> Or you could show it to your lecturer or a TA and say it was suggested 
>> that you ask her or him to work through it with you.
>> 
>> -- 
>> Denis McMahon, denismfmcmahon@gmail.com
>> -- 
>> https://mail.python.org/mailman/listinfo/python-list
>

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Thread

Help with some python homework... scottwd80@gmail.com - 2014-01-30 21:12 -0800
  Re: Help with some python homework... Chris Angelico <rosuav@gmail.com> - 2014-01-31 16:30 +1100
    Re: Help with some python homework... sjud9227 <scottwd80@gmail.com> - 2014-01-30 22:24 -0800
      Re: Help with some python homework... Chris Angelico <rosuav@gmail.com> - 2014-01-31 17:38 +1100
        Re: Help with some python homework... sjud9227 <scottwd80@gmail.com> - 2014-01-30 22:48 -0800
      Re: Help with some python homework... Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-01-31 21:17 +1300
        Re: Help with some python homework... Chris Angelico <rosuav@gmail.com> - 2014-01-31 19:30 +1100
          Re: Help with some python homework... Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-01-31 23:46 +1300
        Re: Help with some python homework... Chris Angelico <rosuav@gmail.com> - 2014-02-01 11:57 +1100
        Re: Help with some python homework... Chris Angelico <rosuav@gmail.com> - 2014-02-01 12:34 +1100
        Re: Help with some python homework... David <bouncingcats@gmail.com> - 2014-02-01 14:17 +1100
        Re: Help with some python homework... Scott W Dunning <swdunning@cox.net> - 2014-01-31 18:14 -0700
          Re: Help with some python homework... Denis McMahon <denismfmcmahon@gmail.com> - 2014-02-01 19:32 +0000
            Re: Help with some python homework... David Hutto <dwightdhutto@gmail.com> - 2014-02-02 17:12 -0800
              Re: Help with some python homework... Larry Hudson <orgnut@yahoo.com> - 2014-02-02 23:48 -0800
        Re: Help with some python homework... Scott W Dunning <swdunning@cox.net> - 2014-01-31 17:46 -0700
        Re: Help with some python homework... Scott W Dunning <swdunning@cox.net> - 2014-01-31 17:42 -0700
        Re: Help with some python homework... David <bouncingcats@gmail.com> - 2014-02-01 17:13 +1100
        Re: Help with some python homework... Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-02-01 10:44 -0500
  Re: Help with some python homework... Neil Cerutti <neilc@norwich.edu> - 2014-01-31 13:51 +0000
  Re: Help with some python homework... Denis McMahon <denismfmcmahon@gmail.com> - 2014-02-01 03:02 +0000
  Re: Help with some python homework... Scott W Dunning <swdunning@cox.net> - 2014-01-31 17:35 -0700
  Re: Help with some python homework... Scott W Dunning <swdunning@cox.net> - 2014-01-31 22:18 -0700
    Re: Help with some python homework... Denis McMahon <denismfmcmahon@gmail.com> - 2014-02-01 19:45 +0000
    Re: Help with some python homework... David Hutto <dwightdhutto@gmail.com> - 2014-02-02 08:11 -0800
      Re: Help with some python homework... David Hutto <dwightdhutto@gmail.com> - 2014-02-02 08:36 -0800
      Re: Help with some python homework... MRAB <python@mrabarnett.plus.com> - 2014-02-02 16:38 +0000
        Re: Help with some python homework... David Hutto <dwightdhutto@gmail.com> - 2014-02-02 08:57 -0800
          Re: Help with some python homework... Denis McMahon <denismfmcmahon@gmail.com> - 2014-02-02 17:43 +0000
            Re: Help with some python homework... David Hutto <dwightdhutto@gmail.com> - 2014-02-02 10:09 -0800
            Re: Help with some python homework... David Hutto <dwightdhutto@gmail.com> - 2014-02-02 11:08 -0800
              Re: Help with some python homework... David Hutto <dwightdhutto@gmail.com> - 2014-02-02 11:21 -0800
    Re: Help with some python homework... "Rhodri James" <rhodri@wildebst.org.uk> - 2014-02-02 17:15 +0000
  Re: Help with some python homework... Scott W Dunning <swdunning@cox.net> - 2014-01-31 22:04 -0700
  Re: Help with some python homework... Scott W Dunning <swdunning@cox.net> - 2014-01-31 17:07 -0700
  Re: Help with some python homework... Scott W Dunning <swdunning@cox.net> - 2014-01-31 22:19 -0700
  Re: Help with some python homework... Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2014-02-01 10:50 -0500
  Re: Help with some python homework... Scott W Dunning <swdunning@cox.net> - 2014-02-01 23:06 -0700

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