On 01/26/2014 04:22 AM, Keith Winston wrote:
On Sat, Jan 25, 2014 at 5:09 PM, Oscar Benjamin
wrote:
Perhaps it would be better though to point at this:
round(D('0.123456'), 3)
Decimal('0.123')
I think you are right. I didn't even think of round(). I think we have
confounded two issues in th
On Sat, Jan 25, 2014 at 5:09 PM, Oscar Benjamin
wrote:
> Perhaps it would be better though to point at this:
round(D('0.123456'), 3)
> Decimal('0.123')
I think you are right. I didn't even think of round(). I think we have
confounded two issues in this thread, the internal
representation/acc
On 01/25/2014 10:38 PM, Keith Winston wrote:
Also, just to be clear: I'd suggest floats because decimal requires
importing a module and using the non-built-in features thereof
The issue is not that much whether it's supported by builtins, in software, but
by CPU's; which is not the case, so th
On 01/25/2014 10:19 PM, Keith Winston wrote:
On Sat, Jan 25, 2014 at 3:57 AM, spir wrote:
Note: AFAIK most financial software use integers for this reason and to
avoid (or control) rounding errors.
I don't think this is true (no flame intended, hopefully you know I'm
forever in your debt Deni
On 01/25/2014 10:01 PM, Keith Winston wrote:
On Sat, Jan 25, 2014 at 3:57 AM, spir wrote:
.009 to the price, so that people do not have to type the full amount.
Example, 3.49 /gallon would return 3.499 /gallon.
This is what I have tried and the results of it.
def gas_price(price):
pri
On 25 January 2014 21:38, Keith Winston wrote:
>
> Also, just to be clear: I'd suggest floats because decimal requires
> importing a module and using the non-built-in features thereof,
Importing a module is not something to be afraid of. Python comes with
loads of modules especially so you can im
On 25/01/14 21:19, Keith Winston wrote:
On Sat, Jan 25, 2014 at 3:57 AM, spir wrote:
Note: AFAIK most financial software use integers for this reason and to
avoid (or control) rounding errors.
I don't think this is true
I can't speak for the general case but the only major financial app I'v
Also, just to be clear: I'd suggest floats because decimal requires
importing a module and using the non-built-in features thereof,
especially if you're going to do something like
decimal.getcontext().prec (even that doesn't set precision AFTER the
decimal point... only total precision). My point b
On 25 January 2014 21:01, Keith Winston wrote:
>
> I think that you should probably do your math in floating point (why
> get complicated? And you might need the accuracy, for hundredths of
> dollars and interest) and then format the output to be what you want.
> Watch out for rounding.
It may no
On Sat, Jan 25, 2014 at 3:57 AM, spir wrote:
> Note: AFAIK most financial software use integers for this reason and to
> avoid (or control) rounding errors.
I don't think this is true (no flame intended, hopefully you know I'm
forever in your debt Denis): there's a famous scam where insiders at a
On Sat, Jan 25, 2014 at 3:57 AM, spir wrote:
>> .009 to the price, so that people do not have to type the full amount.
>> Example, 3.49 /gallon would return 3.499 /gallon.
>>
>> This is what I have tried and the results of it.
>>
>> def gas_price(price):
>> price == raw_input("What is the pr
On 25 January 2014 08:57, spir wrote:
> On 01/25/2014 09:46 AM, spir wrote:
>>
>> On 01/24/2014 06:57 PM, Leon S wrote:
>>>
>>> Here is what I'm trying to do, accept a price of gas, but I want to add
>>> the
>>> .009 to the price, so that people do not have to type the full amount.
>>> Example,
On 01/25/2014 09:46 AM, spir wrote:
On 01/24/2014 06:57 PM, Leon S wrote:
Here is what I'm trying to do, accept a price of gas, but I want to add the
.009 to the price, so that people do not have to type the full amount.
Example, 3.49 /gallon would return 3.499 /gallon.
This is what I have tr
On 01/24/2014 06:57 PM, Leon S wrote:
Here is what I'm trying to do, accept a price of gas, but I want to add the
.009 to the price, so that people do not have to type the full amount.
Example, 3.49 /gallon would return 3.499 /gallon.
This is what I have tried and the results of it.
def gas_p
Leon S Wrote in message:
> _
(please post in plain text in this text mailing list. Html messes
up formatting and causes some newsreaders grief.)
..
Leon said:
Here is what I'm trying to do, accept a price of gas, but I want
to add the .009 to the price, so that people do n
hi leon,
you made a good start and ran into something that i know doesn't seem right
to you. however, before we attack the issue, there are some basic problems
with the code you need to correct first. below are a few explanations and
perhaps workarounds:
1. you're passing in price *and* asking
maybe this would be of help
https://stackoverflow.com/questions/455612/python-limiting-floats-to-two-decimal-points
On Fri, Jan 24, 2014 at 5:57 PM, Leon S wrote:
> Here is what I'm trying to do, accept a price of gas, but I want to add
> the .009 to the price, so that people do not have to ty
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