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| 15:23.55 | jdobrien | I am having difficulty using a Decimal with storm |
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| 15:24.45 | jdobrien | TypeError: Expected Decimal, found <class 'storm.properties.Decimal'>: <storm.properties.Decimal object at 0x1099910> |
| 15:49.40 | jkakar | jdobrien: Have you managed to get anywhere with it? |
| 15:50.16 | radix | jdobrien: it looks like you were trying to use storm.properties.Decimal as something other than a property |
| 15:51.18 | jkakar | There's some vaguely related details about Decimal stuff here: https://lists.ubuntu.com/archives/storm/2007-November/000416.html |
| 15:51.22 | jkakar | You might just have a name conflict...? |
| 15:53.56 | jdobrien | no...i can't assign a float to it |
| 15:54.07 | jdobrien | so if price = Decimal() |
| 15:54.14 | jdobrien | I can't do price = 10.0 |
| 15:55.41 | jdobrien | radix: yeah that was output of when i was trying to convert it |
| 15:55.59 | jdobrien | radix: the real problem is this: TypeError: Expected Decimal, found <type 'float'>: 10.0 |
| 15:56.00 | radix | jdobrien: man, don't try to assign floats to decimals |
| 15:56.01 | radix | are you crazy |
| 15:56.12 | jkakar | MENATAAATAlll! |
| 15:56.42 | radix | jdobrien: you have to assign instances of the Python decimal type to it |
| 15:56.46 | jdobrien | i was under the assumption that it was a decimal.Decimal under the covers |
| 15:57.01 | niemeyer | "are you crazy" is an awesome response :-) |
| 15:57.10 | jdobrien | indeed |
| 15:57.36 | radix | unfortunately there's a namespace collision |
| 15:57.40 | jdobrien | so this: |
| 15:57.42 | radix | there's decimal.Decimal and storm.properties.Decimal |
| 15:57.44 | jdobrien | <PROTECTED> |
| 15:58.01 | jdobrien | TypeError: Cannot convert float to Decimal. First convert the float to a string |
| 15:58.07 | radix | jdobrien: that error is from Python |
| 15:58.11 | niemeyer | jdobrien: Yeah, so |
| 15:58.13 | radix | jdobrien: decimal.Decimal(3.0) doesn't work |
| 15:58.21 | niemeyer | jdobrien: Decimals are used to preserve information |
| 15:58.30 | jdobrien | oh damn it worked this time |
| 15:58.36 | jdobrien | hehe |
| 15:59.06 | jdobrien | this beautiful code worked: self.price = decimal.Decimal(str(price)) |
| 15:59.10 | niemeyer | jdobrien: If you assign a decimal from a float value, the whole computation will be bound by the binary floating point behavior again |
| 15:59.21 | niemeyer | jdobrien: Killing the original intention of decimals |
| 15:59.36 | radix | BE CAREFUL |
| 15:59.39 | jkakar | You don't want to store prices/currency as floats. |
| 15:59.46 | niemeyer | hits radix with a trout |
| 15:59.47 | jkakar | PRECISION IS ****SO**** AHRD! |
| 15:59.47 | jdobrien | no i do not |
| 16:00.02 | jdobrien | which is why i used NUMERIC in postgres |
| 16:00.06 | jkakar | Heh :) |
| 16:00.08 | radix | jdobrien: you also probably don't want to be str()ing float objects just to stick them into decimals |
| 16:00.16 | radix | jdobrien: because that can corrupt the data |
| 16:00.22 | radix | I mean, having a float in the first place |
| 16:00.30 | niemeyer | jdobrien: Yeah, it will if you str(float), but that's a very bad thing to do if you're trying to preserve information with decimals |
| 16:00.38 | radix | it's kind of like unicode |
| 16:00.39 | jdobrien | hmm |
| 16:00.46 | niemeyer | jdobrien: Not only you'll be bound by the lack of precision of floats, but you'll be truncating the value randomly |
| 16:00.46 | jkakar | jdobrien: We're all sprinting together and it's the second week... we're going a bit batty. Please disregard any crazy statements we might make. :) |
| 16:01.21 | jdobrien | these are simple numbers. but i will be doing currency conversions with them...so i don't want to loose precision |
| 16:01.32 | radix | jdobrien: ok, so where are you getting the float in the first place? |
| 16:01.37 | niemeyer | jdobrien: Precisely |
| 16:01.46 | niemeyer | jdobrien: Doing str(float) is truly bad in that context |
| 16:02.03 | jdobrien | this is currently just in some sample data i am loading |
| 16:02.17 | jdobrien | i need to find a better way of doing it |
| 16:02.21 | niemeyer | jdobrien: So use pure strings or Decimals to represent the numbers in all instances |
| 16:02.32 | niemeyer | jdobrien: E.g. "1.23" or Decimal("1.23") |
| 16:03.03 | jdobrien | niemeyer: thanks. |
| 16:03.25 | jdobrien | a 2 week sprint! YOU GUYS ARE CRAZY! |
| 16:03.25 | niemeyer | jdobrien: You're welcome! |
| 16:03.42 | jdobrien | my brain is mush after a week |
| 16:03.43 | niemeyer | jdobrien: You should be here to have an idea 8-) |
| 16:03.45 | radix | we are frickin' hardcore man |
| 16:05.33 | jdobrien | i should just tell jane to round up all of our prices to the nearest int |
| 16:06.39 | niemeyer | jdobrien: Hmm |
| 16:06.46 | niemeyer | jdobrien: Well :-) |
| 16:06.50 | jdobrien | niemeyer: i am kidding |
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| 16:07.01 | niemeyer | jdobrien: Ohh, phew! ;-) |
| 16:07.29 | niemeyer | radix: Yeah, we have Mad Skills (http://itmanagement.earthweb.com/features/article.php/12297_3771746_2) |
| 16:08.18 | niemeyer | I was just pointing out here that this story is so terrible it makes me want to puke |
| 16:09.37 | jdobrien | i don't recall meeting a developer that wasn't "Cocky" |
| 16:10.29 | niemeyer | jdobrien: Luckily all the developers I work with in a daily basis are far from the behavior described in this post |
| 16:11.21 | jdobrien | niemeyer: he's more of a jerk than just being cocky |
| 16:11.34 | niemeyer | jdobrien: That's true :-) |
| 16:12.25 | niemeyer | jdobrien: But I really mean *far*.. our decision making process involves a lot of consensus making and discussions all around.. from implementation to goals and everything else |
| 16:12.29 | jdobrien | niemeyer: hmm |
| 16:14.04 | jkakar | It seems to come down to being reasonable and not assuming the other people you work with are stupid. We're all fairly reasonable so when we disagree it's more about trying to understand the other person's point of view and talking about things reasonably. |
| 16:14.06 | jdobrien | niemeyer: in reading the definition of cocky...i guess it matches... |
| 16:14.31 | jdobrien | jkakar: good point. |
| 16:14.42 | jkakar | It's super boring to work with people that get angry whenever someone disagrees and then have to be calmed down before everyone can continue forward. |
| 16:17.08 | jdobrien | i've been in environments where it was very easy to get jaded and cynical...which can quickly turn you into a Cocky bastard |
| 16:17.28 | jkakar | Yeah, that's one of the problems: negativity breeds negativity. It's hard to stay positive in that kind of environment. |
| 16:17.45 | jdobrien | which is why i'm here! |
| 16:17.53 | radix | :-) |
| 16:18.02 | jkakar | But, well, hard things aren't impossible. I think "lead by example" is at least the minimal thing an individual can do to try to effect positive change. |
| 16:18.07 | jkakar | Anyway, foooooood! |
| 16:19.02 | jdobrien | niemeyer: FWIW dateutil rocks |
| 16:19.34 | niemeyer | jdobrien: Thank you! |
| 16:20.52 | niemeyer | Lunch time! |
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