| --- Log opened Thu Mar 20 00:00:32 2014 |
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| 09:33 | < Erik> | I can never remember when to use zip(). |
| 09:34 | < Erik> | Is there some kind of good philosophical argument for what 'should' be the output of saying "for x, y in ((1,2),(3,4)): print x,y" ? |
| 09:34 | < Syk> | Erik: yes |
| 09:34 | < Syk> | it's called expansion |
| 09:35 | < Syk> | >> omg, wtf = ("lol", "bbq") |
| 09:35 | < Syk> | >> print omg |
| 09:35 | < Syk> | "lol" |
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| 09:37 | <~Vornicus> | Erik: you iterate over the outer thing, which puts the inner thing up against the x, y |
| 09:38 | <~Vornicus> | You use zip when you have parallel lists of data, and you don't use zip when you have a list of big hunks of data. |
| 09:39 | < Syk> | or you use izip |
| 09:39 | < Syk> | on py2.7 |
| 09:39 | < Syk> | which uses ~iterators~ |
| 09:39 | <~Vornicus> | well... yes, but i figured you'd know when you wanted that. |
| 09:40 | <~Vornicus> | It's a minor refinement |
| 09:46 | < Erik> | Syk: That doesn't make the prediction obvious to me. |
| 09:46 | < Erik> | When I call multiple iterators over multiple elements, I'm not seeing the obvious reason why the first iterator should loop over first sub-elements of all elements, rather than over sub-elements of first element |
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| 10:12 | < HearingEarDog> | http://imgur.com/gallery/iJD8f |
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| 10:25 | <~Vornicus> | Erik: like I said - for ... in iterates over the outer container |
| 10:26 | <~Vornicus> | the pile of names in the ... there disassemble individual hunks handed to it. The same way that assignment always works. |
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| 10:37 | <~Vornicus> | Indeed, try this on for size: for a, (b, c) in ((1, (2, 3)), (4, (5, 6))): print (a, b, c) |
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| 15:13 | <@Azash> | http://imgur.com/gallery/iJD8f |
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| 15:53 | <@TheWatcher> | Uuugh |
| 15:53 | <@TheWatcher> | I really need to refactor this whole codebase |
| 15:53 | <@TheWatcher> | but no time >.< |
| 15:55 | <@Azash> | That feeling |
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| 20:11 | | * Derakon blarghs at his code, has something that's scaling poorly with experiment size. |
| 20:12 | <&Derakon> | That is, the more we try to do in a given experiment, the longer it takes to calculate the actions the experiment does, nonlinearly. |
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| 20:20 | <&Derakon> | You'd think it'd be easy to spot something that's scaling in cost with the number of iterations you've done, but it's eluding me so far... |
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| 20:21 | <&Derakon> | ...oh, wait, there it is. ._. |
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| 20:25 | <&Derakon> | Yeah, there we go. Every iteration of the loop, we were getting the timestamps of the first and last action in the overall list of actions, which was done by iterating over the entire list. |
| 20:26 | <&Derakon> | Which even for a fairly short experiment was about 2k entries. |
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| 20:42 | <@RichyB> | Derakon, don't you have a profiler? Usually that one quadratic bit in an otherwise linear algorithm will show up clear as day in a profiler. |
| 20:45 | <&Derakon> | RichyB: profiling code embedded in a GUI can be tricky sometimes. |
| 20:45 | <&Derakon> | Also I'm feeling a little slow today. |
| 20:46 | <@RichyB> | ugh yes, anything that spends 99% of its time idling in an event loop for network|user input is a mild PITA to profile |
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| --- Log closed Fri Mar 21 00:00:48 2014 |