Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.python > #99206
| Path | csiph.com!eternal-september.org!feeder.eternal-september.org!mx02.eternal-september.org!.POSTED!not-for-mail |
|---|---|
| From | BartC <bc@freeuk.com> |
| Newsgroups | comp.lang.python |
| Subject | Re: *= operator |
| Date | Sat, 21 Nov 2015 13:37:25 +0000 |
| Organization | A noiseless patient Spider |
| Lines | 34 |
| Message-ID | <n2prun$3du$1@dont-email.me> (permalink) |
| References | <a76b1b5b-4321-41bb-aeca-0dac787752d9@googlegroups.com> |
| Mime-Version | 1.0 |
| Content-Type | text/plain; charset=windows-1252; format=flowed |
| Content-Transfer-Encoding | 7bit |
| Injection-Date | Sat, 21 Nov 2015 13:35:20 -0000 (UTC) |
| Injection-Info | mx02.eternal-september.org; posting-host="cf45b3961a050227b1103bebc3cbc15a"; logging-data="3518"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX196OnAcAdW1yw+Bj9I2XoiM" |
| User-Agent | Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 |
| In-Reply-To | <a76b1b5b-4321-41bb-aeca-0dac787752d9@googlegroups.com> |
| Cancel-Lock | sha1:waXQaZ1FhgrTwLFdqYJo6da4wo0= |
| Xref | csiph.com comp.lang.python:99206 |
Show key headers only | View raw
On 21/11/2015 13:20, Cai Gengyang wrote: > This is a piece of code that calculates tax and tip : > > def tax(bill): > """Adds 8% tax to a restaurant bill.""" > bill *= 1.08 > print "With tax: %f" % bill > return bill > > def tip(bill): > """Adds 15% tip to a restaurant bill.""" > bill *= 1.15 > print "With tip: %f" % bill > return bill > > meal_cost = 100 > meal_with_tax = tax(meal_cost) > meal_with_tip = tip(meal_with_tax) > > Does bill *= 1.08 mean bill = bill * 1.15 ? bill *= 1.08 would mean bill = bill*1.08 (not 1.15; I assume that's a typo). Although you can never be 100% sure in Python (as * or *= could have been redefined to do something else), there's no reason to suspect that here. Also, there's probably some technical difference that someone could up with (*= doing in-place modification for example), but that shouldn't matter when bill is just a number. -- Bartc
Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
*= operator Cai Gengyang <gengyangcai@gmail.com> - 2015-11-21 05:20 -0800
Re: *= operator BartC <bc@freeuk.com> - 2015-11-21 13:37 +0000
Re: *= operator Steven D'Aprano <steve@pearwood.info> - 2015-11-22 00:39 +1100
Re: *= operator Joel Goldstick <joel.goldstick@gmail.com> - 2015-11-21 08:58 -0500
Re: *= operator "Frank Millman" <frank@chagford.com> - 2015-11-21 15:46 +0200
Re: *= operator Cai Gengyang <gengyangcai@gmail.com> - 2015-11-21 05:55 -0800
csiph-web