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Groups > comp.lang.python > #65277
| Newsgroups | comp.lang.python |
|---|---|
| Date | 2014-02-02 10:09 -0800 |
| References | (1 earlier) <mailman.6264.1391232938.18130.python-list@python.org> <d8c2b5bd-d56d-4327-b219-85f0b304b187@googlegroups.com> <mailman.6308.1391359140.18130.python-list@python.org> <be2d121a-fa68-41b3-b5b6-790d52f009a5@googlegroups.com> <lcm035$70b$1@dont-email.me> |
| Message-ID | <dcce80cc-e633-4a13-9d10-1efef79c0cef@googlegroups.com> (permalink) |
| Subject | Re: Help with some python homework... |
| From | David Hutto <dwightdhutto@gmail.com> |
On Sunday, February 2, 2014 12:43:01 PM UTC-5, Denis McMahon wrote:
> On Sun, 02 Feb 2014 08:57:03 -0800, David Hutto wrote:
>
>
>
> > Revised:
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>
>
> > discounted_price = price_per_book - (price_per_book * percent_discount)
>
>
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> by applying some simple algebra to the right hand side
>
>
>
> price_per_book - (price_per_book * percent_discount)
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>
>
> "x = (x * 1)" so "price_per_book == (price_per_book * 1)" so rhs becomes
>
>
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> (price_per_book * 1) - (price_per_book * percent_discount)
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>
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> and "(a * x) - (a * y)" == "a * (x - y)" so rhs becomes
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>
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> price_per_book * (1 - percent_discount)
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> hence:
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> discounted_price = price_per_book * (1 - percent_discount)
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>
>
> --
>
> Denis McMahon
The one just looks out of place compare to using properly defined names,(algebra aside) like this:
def order_total():
price_per_book = float(raw_input("Enter price per book: $"))
percent_discount_amount = float(raw_input("Enter percent discount amount(in format example .40): "))
quantity = float(raw_input("Enter quantity of books: "))
first_book_shipping = float(raw_input("Enter first book's shipping: $"))
extra_book_shipping = float(raw_input("Enter extra book's shipping costs: $"))
percent_discount = price_per_book * percent_discount_amount
amount_of_first_books = 1 # of course it would equal 1
discounted_price = price_per_book - percent_discount
shipping = first_book_shipping + ((quantity - amount_of_first_books) * extra_book_shipping)
total_price = (quantity * discounted_price) + shipping
print 'Total price: $%d' % (total_price)
order_total()
************Or Use with params for iterating through larger amounts of books to be calculated*****************
def order_total(price_per_book,percent_discount_amount,quantity,first_book_shipping,extra_book_shipping):
percent_discount = price_per_book * percent_discount_amount
amount_of_first_book = 1 # of course it would equal 1
discounted_price = price_per_book - percent_discount
shipping = first_book_shipping + ((quantity - amount_of_first_book) * extra_book_shipping)
total_price = (quantity * discounted_price) + shipping
print 'Total price: $%d' % (total_price)
price_per_book = float(raw_input("Enter price per book: $"))
percent_discount_amount = float(raw_input("Enter percent discount amount(in format example .40): "))
quantity = float(raw_input("Enter quantity of books: "))
first_book_shipping = float(raw_input("Enter first book's shipping: $"))
extra_book_shipping = float(raw_input("Enter extra book's shipping costs: $"))
order_total(price_per_book,percent_discount_amount,quantity,first_book_shipping,extra_book_shipping)
The numbers just seem out of place when a var can be used that properly defines it, or another way to arrive at the same solution.
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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
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Re: Help with some python homework... Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-01-31 21:17 +1300
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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
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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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