Mailman 3 August 2012 - pypy-dev

_marshal EOF error?
by Jonathan Slenders Aug. 9, 2012

Aug. 9, 2012

Hi everyone, I have almost a sandlib.py library ready for the Twisted Matrix framework. (The sandlib which is shipped with PyPy is not usable within Twisted.) However, the deserialisation of marshalled messages fails when the sandbox Python process does very big write system calls. Actually, the problem is that the write calls arrive in multiple chunks in the outReceived of the ProcessProtocol (Twisted code). Marshal.loads thinks the first chunk is valid on its own while it isn't yet. Long … [View More]

2 2

Questions Regarding Scipy in Pypy (Not a Feature Request)
by Steven Jackson Aug. 9, 2012

Aug. 9, 2012

I know there is no current plan to implement scipy in pypy, but searching the PyPy website, I was not able to find the reason. If it is not to be included as a feature due to lack of interest or developer time, I am offering to begin rewriting scipy in pure python (I have quite a bit of free time to do this). If it has been discussed and actively excluded from pypy, I would like to know that before I waste too much time rewriting it. I have an active interest in being able to use some modules … [View More]

6 9

Dependence Graphs in Pypy?
by Tim Henderson Aug. 9, 2012

Aug. 9, 2012

Hi Pypy devs! I am a graduate student working on mining software repositories, specifically mining programming patterns (or rules) from code bases.[1] I would like to do some work mining patterns from Python programs and I could jump start that work if I could generate dependence graphs from python source files (or from the bytecode). So I was wondering if Pypy does this already. Actually it would be a big help even if pypy only generated a control flow graph. From my quick skim of some of … [View More]

4 4

Help (again)
by Léonard de Haro Aug. 8, 2012

Aug. 8, 2012

Hi everyone! First of all, thaks for your answers last time. Second of all, I need your help again. I'm coding an imperative version of my interpret and to do so, I coded continuations. I used a similat technique to the one used in the Prolog interpret you advised me to take a look at last time. I define a serie of class all inheriting from a simulated-abstract Contk class. Every class has a method apply which contains instruction for what's next to do. All these methods take the same … [View More]arguments and (except in one case) return the same kind of tuple. The interpret function uses 4 variables that are updated: expr, env, cont, val. Thus, the result of .apply(_,_,_,_) is the tuple for update. class Contk(object): def __init__(self,*arg): raise NotImplementedError("For abstract class") def apply(self,expr,env,val): raise NotImplementedError("For abstract class") class Endk(Contk): def __init__(self,val): self.val = val def apply(self,expr, env, val): return self.val class Idk(Contk): def __init__(self): pass def apply(self, expr, env, val): return expr, env, Endk(val), val There is a class for each continuation needed by the interpret. The trouble is, I get this error: [translation:ERROR] AnnotatorError': annotation of 'union' degenerated to SomeObject() [translation:ERROR] Simple call of incompatible family: [translation:ERROR] (KeyError getting at the binding!) [translation:ERROR] [translation:ERROR] In <FunctionGraph of (RPinterpretImperative:27)Idk.apply at 0x1b31be8>: [translation:ERROR] Happened at file RPinterpretImperative.py line 28 [translation:ERROR] [translation:ERROR] ==> return expr, env, Endk(val), val [translation:ERROR] [translation:ERROR] Previous annotation: [translation:ERROR] (none) [translation:ERROR] .. v0 = simple_call((classobj Endk), val_0) [translation:ERROR] .. '(RPinterpretImperative:27)Idk.apply' [translation:ERROR] Processing block: [translation:ERROR] block@12 is a <class 'pypy.objspace.flow.flowcontext.SpamBlock'> [translation:ERROR] in (RPinterpretImperative:27)Idk.apply [translation:ERROR] containing the following operations: [translation:ERROR] v0 = simple_call((classobj Endk), val_0) [translation:ERROR] v1 = newtuple(expr_0, env_0, v0, val_0) [translation:ERROR] --end-- So at first I thought it was due to tuple that would not accept newly created objects, but after a few tests, it appears that not. Then I tought the annotator couldn't realize by himself that returning an Endk object is the same as returning a Contk, so I annotated the whole file with assertion to force him to realize that my variable cont should be a Contk not any other kind of subclass, but it didn't work either. So I don't know what to do now. I've even tried to implement apply outside of the classes, or to make a function for each parameters returned, but nothing worked. You can find the source here : https://github.com/zebign1/RPython-internship/tree/master/Interpreters/ifF1… (treeClass.py and parser.py as tools, the bugged file is RPinterpretImperative.py) Thanks again. Leonard [View Less]

3 3

Fatal RPython error: MemoryError
by Roger Flores Aug. 8, 2012

Aug. 8, 2012

I'm still getting MemoryError exceptions in RPython, as I mentioned a few months back. I only knew of one way to reproduce it back then, but now I'm seeing different ways. So, inspired, I wrote a short program to quickly exhaust memory in the hopes of reproducing the problem. It seems to work! Fast! If you run the code pasted at the bottom with CPython, it should end printing 'test passed'. If you run the code with pypy 1.9 (I tried Windows), you should get: RPython … [View More]

6 11