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Re: Concerning Dictionaries and += in Python 2.x

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Date Mon, 19 Jan 2015 16:54:24 -0800
Subject Re: Concerning Dictionaries and += in Python 2.x
From Dan Stromberg <drsalists@gmail.com>
To Luke Tomaneng <luketomaneng@gmail.com>
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On Mon, Jan 19, 2015 at 4:12 PM, Luke Tomaneng <luketomaneng@gmail.com> wrote:
> I have been having a bit of trouble with the things mentioned in the title. I have written the following script for a Codecademy course:
> stock = {
>     "banana": 6,
>     "apple": 0,
>     "orange": 32,
>     "pear": 15
> }
>
> prices = {
>     "banana": 4,
>     "apple": 2,
>     "orange": 1.5,
>     "pear": 3
> }
>
> def compute_bill(food):
>     total = 0
>     for item in food:
>         if stock[item] > 0:
>             total += prices[item]
>             stock[item] = stock[item] - 1
>             return total
> Whenever I run this script, "4" is returned. It does not seem to matter what in in the list the script is run on. I have tried this on the Codecademy interpreter/emulator (I'm not sure which they use) and the repl.it interpreter, but for the same result. If anyone could find the glitch in my code, please let me know. Thanks!

You're returning total inappropriately - the first time stock[item] is > 0.

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Thread

Concerning Dictionaries and += in Python 2.x Luke Tomaneng <luketomaneng@gmail.com> - 2015-01-19 16:12 -0800
  Re: Concerning Dictionaries and += in Python 2.x Chris Angelico <rosuav@gmail.com> - 2015-01-20 11:21 +1100
    Re: Concerning Dictionaries and += in Python 2.x Luke Tomaneng <luketomaneng@gmail.com> - 2015-01-19 16:31 -0800
  Re: Concerning Dictionaries and += in Python 2.x MRAB <python@mrabarnett.plus.com> - 2015-01-20 00:27 +0000
  Re: Concerning Dictionaries and += in Python 2.x Luke Tomaneng <luketomaneng@gmail.com> - 2015-01-19 16:34 -0800
    Re: Concerning Dictionaries and += in Python 2.x Chris Angelico <rosuav@gmail.com> - 2015-01-20 11:46 +1100
  Re: Concerning Dictionaries and += in Python 2.x Dan Stromberg <drsalists@gmail.com> - 2015-01-19 16:54 -0800
  Re: Concerning Dictionaries and += in Python 2.x Denis McMahon <denismfmcmahon@gmail.com> - 2015-01-21 05:01 +0000
    Re: Concerning Dictionaries and += in Python 2.x Peter Otten <__peter__@web.de> - 2015-01-21 09:43 +0100
      Re: Concerning Dictionaries and += in Python 2.x Denis McMahon <denismfmcmahon@gmail.com> - 2015-01-21 14:10 +0000
    Re: Concerning Dictionaries and += in Python 2.x Peter Otten <__peter__@web.de> - 2015-01-21 09:59 +0100

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