Mailman 3 May 2011 - pypy-dev

Allow subclassing `staticmethod` and `classmethod`
by cool-RR May 3, 2011

May 3, 2011

In my project I made an `abstract_static_method` class: https://github.com/cool-RR/GarlicSim/blob/master/garlicsim/garlicsim/genera… <https://github.com/cool-RR/GarlicSim/blob/master/garlicsim/garlicsim/genera…>A similar one has been made in Python 3.2: http://hg.python.org/cpython/file/default/Lib/abc.py#l48 <http://hg.python.org/cpython/file/default/Lib/abc.py#l48>In Pypy this currently cannot be done, because if you subclass `staticmethod` into `abstractstaticmethod`, any instances will have a class of `staticmethod` instead of `abstractstaticmethod`: >>>> class A(staticmethod): .... pass .... >>>> def f(): .... pass .... >>>> a = A(f) >>>> a <staticmethod object at 0x00f2ade0> >>>> type(a) <type 'staticmethod'> What can be done? I want to have `abstract_static_method` in my code. Thanks, Ram.

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BytecodeCorruption error with pypy-1.5
by renaud blanch May 3, 2011

May 3, 2011

Hello, First, thank you for the pypy-1.5 release! I quickly tested pypy-1.5 (osx64 binary from your download page) with some code I use as benchmark (some solutions to Google code jam problems), and I got a reproductible "Fatal RPython error: BytecodeCorruption". The minimal code sample that reproduce this behaviour I could came up with is: <code> def what(_="whatever"): return (_ if _ else _) if False else _ what() </code> This code works as expected with any cpython and with pypy-1.4.1 on the same machine (Intel Core 2 Duo iMac/Mac OS X 10.6.7). Should I open a bug on the pypy tracker? renaud

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speed of sympy tests
by Ondrej Certik May 3, 2011

May 3, 2011

Hi, I have downloaded the pypy 1.5 binary (with jit) and run tests (only sympy/core, so that it's fast) on Ubuntu Natty, 64bit: ondrej@eagle:~/repos/sympy(master)$ bin/test sympy/core/ ============================= test process starts ============================== executable: /usr/bin/python (2.7.1-final-0) ground types: python sympy/core/tests/test_arit.py[48] ...f.......................................... .. [OK] sympy/core/tests/test_assumptions.py[28] ....f....................... [OK] sympy/core/tests/test_basic.py[10] .......... [OK] sympy/core/tests/test_cache.py[1] . [OK] sympy/core/tests/test_complex.py[13] ............. [OK] sympy/core/tests/test_containers.py[5] ..... [OK] sympy/core/tests/test_count_ops.py[2] .. [OK] sympy/core/tests/test_diff.py[6] ...... [OK] sympy/core/tests/test_equal.py[5] ..... [OK] sympy/core/tests/test_eval.py[8] .....f.. [OK] sympy/core/tests/test_eval_power.py[12] ............ [OK] sympy/core/tests/test_evalf.py[23] ....................... [OK] sympy/core/tests/test_expand.py[6] ...... [OK] sympy/core/tests/test_expr.py[60] .............................................. .............. [OK] sympy/core/tests/test_exprtools.py[4] .... [OK] sympy/core/tests/test_facts.py[11] ........... [OK] sympy/core/tests/test_functions.py[23] .....f................. [OK] sympy/core/tests/test_logic.py[11] ........... [OK] sympy/core/tests/test_match.py[26] ...f...................... [OK] sympy/core/tests/test_numbers.py[47] ........................................... .... [OK] sympy/core/tests/test_operations.py[4] .... [OK] sympy/core/tests/test_priority.py[5] ..... [OK] sympy/core/tests/test_relational.py[7] ....... [OK] sympy/core/tests/test_sets.py[18] .................. [OK] sympy/core/tests/test_subs.py[30] .............................. [OK] sympy/core/tests/test_symbol.py[9] ......... [OK] sympy/core/tests/test_sympify.py[23] ....................... [OK] sympy/core/tests/test_truediv.py[3] ... [OK] sympy/core/tests/test_var.py[5] ..... [OK] ======= tests finished: 448 passed, 5 expected to fail, in 2.90 seconds ======== ondrej@eagle:~/repos/sympy(master)$ ~/Downloads/pypy-c-jit-43780-b590cf6de419-linux64/bin/pypy bin/test sympy/core/ ============================= test process starts ============================== executable: /home/ondrej/Downloads/pypy-c-jit-43780-b590cf6de419-linux64/bin/pypy (2.7.1-final-42) ground types: python sympy/core/tests/test_arit.py[48] ...f.......................................... .. [OK] sympy/core/tests/test_assumptions.py[28] ....f....................... [OK] sympy/core/tests/test_basic.py[10] .......... [OK] sympy/core/tests/test_cache.py[1] . [OK] sympy/core/tests/test_complex.py[13] ............. [OK] sympy/core/tests/test_containers.py[5] ..... [OK] sympy/core/tests/test_count_ops.py[2] .. [OK] sympy/core/tests/test_diff.py[6] ...... [OK] sympy/core/tests/test_equal.py[5] ..... [OK] sympy/core/tests/test_eval.py[8] .....f.. [OK] sympy/core/tests/test_eval_power.py[12] ............ [OK] sympy/core/tests/test_evalf.py[23] ....................... [OK] sympy/core/tests/test_expand.py[6] ...... [OK] sympy/core/tests/test_expr.py[60] ..........F................................... .............. [FAIL] sympy/core/tests/test_exprtools.py[4] .... [OK] sympy/core/tests/test_facts.py[11] ........... [OK] sympy/core/tests/test_functions.py[23] .....f................. [OK] sympy/core/tests/test_logic.py[11] ........... [OK] sympy/core/tests/test_match.py[26] ...f...................... [OK] sympy/core/tests/test_numbers.py[47] ........................................... .... [OK] sympy/core/tests/test_operations.py[4] .... [OK] sympy/core/tests/test_priority.py[5] ..... [OK] sympy/core/tests/test_relational.py[7] ....... [OK] sympy/core/tests/test_sets.py[18] .................. [OK] sympy/core/tests/test_subs.py[30] .............................. [OK] sympy/core/tests/test_symbol.py[9] ......... [OK] sympy/core/tests/test_sympify.py[23] ....................... [OK] sympy/core/tests/test_truediv.py[3] ... [OK] sympy/core/tests/test_var.py[5] ..... [OK] ________________________________________________________________________________ _____________ sympy/core/tests/test_expr.py:test_as_leading_term3 ______________ File "/home/ondrej/repos/sympy/sympy/core/tests/test_expr.py", line 212, in test_as_leading_term3 assert (2*x+pi*x+x**2).as_leading_term(x) == (2+pi)*x AssertionError == tests finished: 447 passed, 1 failed, 5 expected to fail, in 13.87 seconds == DO *NOT* COMMIT! The test failure is probably some minor difference between CPython and PyPy.. However, as you can see, the test execution is 4x slower in PyPy, compared to CPython. Is this the supposed slow down, or is there something specific to sympy? I have also done this test in bin/isympy, CPython: >>> from timeit import default_timer as clock >>> t = clock(); a = expand((1+x+y+z)**20); clock()-t 1.4584941864 PyPy: >>> from timeit import default_timer as clock >>> t = clock(); a = expand((1+x+y+z)**20); clock()-t 4.48898005486 so PyPy is roughly 3x slower here. So 3x or 4x slower, I think that's already very usable. Especially the sandbox pypy is an awesome idea, for serving web apps. The only problem is that I use Cython a lot, which I think is incompatible with PyPy... Ondrej

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docs on doc.pypy.org
by holger krekel May 3, 2011

May 3, 2011

Hi all, i created a CNAME for our use of pypy.readthedocs.org and so you can now reach pypy docs under the frontend URL of http://doc.pypy.org It might be better to promote this link also from pypy.org so that URLs have a higher chance to remain valid even if we decide to move away from readthedocs some day. Moreover, we could see to have (another) sphinx setup for sphinx setup for our current pypy.org so we can host it there as well, maybe under www.pypy.org -- we need to have a subdomain/CNAME as we cannot redirect the root domain to readthedocs. best, holger

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PyPy 1.5 released
by Armin Rigo May 3, 2011

May 3, 2011

====================== PyPy 1.5: Catching Up ====================== We're pleased to announce the 1.5 release of PyPy. This release updates PyPy with the features of CPython 2.7.1, including the standard library. Thus all the features of `CPython 2.6`_ and `CPython 2.7`_ are now supported. It also contains additional performance improvements. You can download it here: http://pypy.org/download.html What is PyPy? ============= PyPy is a very compliant Python interpreter, almost a drop-in replacement for CPython 2.7.1. It's fast (`pypy 1.5 and cpython 2.6.2`_ performance comparison) due to its integrated tracing JIT compiler. This release includes the features of CPython 2.6 and 2.7. It also includes a large number of small improvements to the tracing JIT compiler. It supports Intel machines running Linux 32/64 or Mac OS X. Windows is beta (it roughly works but a lot of small issues have not been fixed so far). Windows 64 is not yet supported. Numerous speed achievements are described on `our blog`_. Normalized speed charts comparing `pypy 1.5 and pypy 1.4`_ as well as `pypy 1.5 and cpython 2.6.2`_ are available on our benchmark website. The speed improvement over 1.4 seems to be around 25% on average. More highlights =============== - The largest change in PyPy's tracing JIT is adding support for `loop invariant code motion`_, which was mostly done by Håkan Ardö. This feature improves the performance of tight loops doing numerical calculations. - The CPython extension module API has been improved and now supports many more extensions. For information on which one are supported, please refer to our `compatibility wiki`_. - These changes make it possible to support `Tkinter and IDLE`_. - The `cProfile`_ profiler is now working with the JIT. However, it skews the performance in unstudied ways. Therefore it is not yet usable to analyze subtle performance problems (the same is true for CPython of course). - There is an `external fork`_ which includes an RPython version of the ``postgresql``. However, there are no prebuilt binaries for this. - Our developer documentation was moved to Sphinx and cleaned up. (click 'Dev Site' on http://pypy.org/ .) - and many small things :-) Cheers, Carl Friedrich Bolz, Laura Creighton, Antonio Cuni, Maciej Fijalkowski, Amaury Forgeot d'Arc, Alex Gaynor, Armin Rigo and the PyPy team .. _`CPython 2.6`: http://docs.python.org/dev/whatsnew/2.6.html .. _`CPython 2.7`: http://docs.python.org/dev/whatsnew/2.7.html .. _`our blog`: http://morepypy.blogspot.com .. _`pypy 1.5 and pypy 1.4`: http://bit.ly/joPhHo .. _`pypy 1.5 and cpython 2.6.2`: http://bit.ly/mbVWwJ .. _`loop invariant code motion`: http://morepypy.blogspot.com/2011/01/loop-invariant-code-motion.html .. _`compatibility wiki`: https://bitbucket.org/pypy/compatibility/wiki/Home .. _`Tkinter and IDLE`: http://morepypy.blogspot.com/2011/04/using-tkinter-and-idle-with-pypy.html .. _`cProfile`: http://docs.python.org/library/profile.html .. _`external fork`: https://bitbucket.org/alex_gaynor/pypy-postgresql

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cpyext reference counting and other gc's
by Dima Tisnek May 3, 2011

May 3, 2011

Hey, I had a look at cpyext recently and saw that reference counting is emulated with, err, reference counting, seeminlgy in the referenced object itself. Does this mean that cpyext would not work with other gc's or is there some wrapping going on behind the scenes?

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virtualenv 1.6.1 now released
by Armin Rigo May 1, 2011

May 1, 2011

Hi, If you are using virtualenv, note that PyPy 1.5 requires virtualenv 1.6.1. It has been released a few hours *after* PyPy 1.5. For those who did not find it, it's there now :-) Armin.

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