Python-Dev February 2013

python-dev@python.org

103 participants
84 discussions

by Thomas Heller

In Python3.3, I thought that every loaded module has a __loader__ attribute. Apparently this is not the case for a few builtin modules: Python 3.3.0 (v3.3.0:bd8afb90ebf2, Sep 29 2012, 10:57:17) [MSC v.1600 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> import importlib >>> >>> def bug(): ... for name in list(sys.modules.keys()): ... try: ... importlib.find_loader(name) ... except Exception as details: ... print(name, type(details), details) ... >>> bug() _frozen_importlib <class 'AttributeError'> 'module' object has no attribute '__loader__' builtins <class 'AttributeError'> 'module' object has no attribute '__loader__' signal <class 'AttributeError'> 'module' object has no attribute '__loader__' importlib._bootstrap <class 'AttributeError'> 'module' object has no attribute '__loader__' >>> However, the importlib docs talk about a ValueError instead of the AttributeError that I see above: > Find the loader for a module, optionally within the specified path. > If the module is in sys.modules, then sys.modules[name].__loader__ > is returned (unless the loader would be None, in which case > ValueError is raised). Is this a bug? Thomas

8 years, 2 months

issue17097:baseManager serve_client() not check EINTR when recv request

by Royce Lv

Hi All, We create our customised manager which will fork child process with baseManager. Because we registered SIGCHLD to reap the zombie for manager, we found this causes baseManager raise RemoteError when called twice.(Test script attached.) After look at baseManager.py we found recv() in handling the request has been interrupted by comming SIGCHLD, not retry recv(), but raise to client side directly. try: methodname = obj = None request = recv()<------------------this line been interrupted by SIGCHLD ident, methodname, args, kwds = request obj, exposed, gettypeid = id_to_obj[ident] if methodname not in exposed: raise AttributeError( 'method %r of %r object is not in exposed=%r' % (methodname, type(obj), exposed) ) function = getattr(obj, methodname) try: res = function(*args, **kwds) except Exception, e: msg = ('#ERROR', e) else: typeid = gettypeid and gettypeid.get(methodname, None) if typeid: rident, rexposed = self.create(conn, typeid, res) token = Token(typeid, self.address, rident) msg = ('#PROXY', (rexposed, token)) else: msg = ('#RETURN', res) except AttributeError: if methodname is None: msg = ('#TRACEBACK', format_exc()) else: try: fallback_func = self.fallback_mapping[methodname] result = fallback_func( self, conn, ident, obj, *args, **kwds ) msg = ('#RETURN', result) except Exception: msg = ('#TRACEBACK', format_exc()) except EOFError: util.debug('got EOF -- exiting thread serving %r', threading.current_thread().name) sys.exit(0) except Exception:<------does not handle IOError,INTR here should retry recv() msg = ('#TRACEBACK', format_exc()) REF: http://bugs.python.org/issue17097

8 years, 2 months

Re: [Python-Dev] cpython (merge 3.3 -> default): #16128: merge with 3.3.

by Antoine Pitrou

On Fri, 1 Feb 2013 04:20:46 +0100 (CET) ezio.melotti <python-checkins(a)python.org> wrote: > > diff --git a/Doc/glossary.rst b/Doc/glossary.rst > --- a/Doc/glossary.rst > +++ b/Doc/glossary.rst > @@ -320,7 +320,8 @@ > All of Python's immutable built-in objects are hashable, while no mutable > containers (such as lists or dictionaries) are. Objects which are > instances of user-defined classes are hashable by default; they all > - compare unequal, and their hash value is their :func:`id`. > + compare unequal (except with themselves), and their hash value is their > + :func:`id`. Python 3.3.0+ (3.3:127abd16168a, Sep 29 2012, 18:46:33) [GCC 4.5.2] on linux Type "help", "copyright", "credits" or "license" for more information. >>> o = object() >>> hash(o) == id(o) False Regards Antoine.

8 years, 2 months

Re: [Python-Dev] [Python-checkins] cpython (2.7): #16128: clarify that instances of user-defined classes compare equal with

by Nick Coghlan

On 1 Feb 2013 13:22, "ezio.melotti" <python-checkins(a)python.org> wrote: > > http://hg.python.org/cpython/rev/79a021beaf58 > changeset: 81861:79a021beaf58 > branch: 2.7 > parent: 81859:8ee6d96a1019 > user: Ezio Melotti <ezio.melotti(a)gmail.com> > date: Fri Feb 01 05:18:44 2013 +0200 > summary: > #16128: clarify that instances of user-defined classes compare equal with themselves. > > files: > Doc/glossary.rst | 3 ++- > 1 files changed, 2 insertions(+), 1 deletions(-) > > > diff --git a/Doc/glossary.rst b/Doc/glossary.rst > --- a/Doc/glossary.rst > +++ b/Doc/glossary.rst > @@ -330,7 +330,8 @@ > All of Python's immutable built-in objects are hashable, while no mutable > containers (such as lists or dictionaries) are. Objects which are > instances of user-defined classes are hashable by default; they all > - compare unequal, and their hash value is their :func:`id`. > + compare unequal (except with themselves), and their hash value is their > + :func:`id`. The hash(x) == id(x) behaviour is a CPython implementation detail. It shouldn't be mentioned here. > > IDLE > An Integrated Development Environment for Python. IDLE is a basic editor > > -- > Repository URL: http://hg.python.org/cpython > > _______________________________________________ > Python-checkins mailing list > Python-checkins(a)python.org > http://mail.python.org/mailman/listinfo/python-checkins >

8 years, 2 months

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

Python-Dev February 2013