Mailman 3 May 2012 - Python-Dev

The step command of pdb is broken
by Xavier de Gaye May 5, 2012

May 5, 2012

Issue http://bugs.python.org/issue13183 raises the point that the step command of pdb is broken. This issue is 6 months old. A patch and test case have been proposed. The 'Lifecycle of a Patch' at http://docs.python.org/devguide/patch.html says <quote> If your patch has not received any notice from reviewers (i.e., no comment made) after a substantial amount of time then you may email python-dev(a)python.org asking for someone to take a look at your patch. </quote> I am the author … [View More]

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Another buildslave - Ubuntu again
by Senthil Kumaran May 4, 2012

May 4, 2012

Hello, I just got a Ubuntu Server running at my disposal, which could be connected 24/7 for at least next 3 months. I am not sure how helpful it would be to have another buildbot on Ubuntu, but i wanted to play with it for a while (as I have more comfort with Ubuntu than any other Unix flavor) before I could change it to cover as OS which is not already covered by the buildbots. As instructed here - http://wiki.python.org/moin/BuildBot could someone please help create a slavename/… [View More]

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Summary of Python tracker Issues
by Python tracker May 4, 2012

May 4, 2012

ACTIVITY SUMMARY (2012-04-27 - 2012-05-04) Python tracker at http://bugs.python.org/ To view or respond to any of the issues listed below, click on the issue. Do NOT respond to this message. Issues counts and deltas: open 3399 ( -6) closed 23101 (+45) total 26500 (+39) Open issues with patches: 1452 Issues opened (26) ================== #13183: pdb skips frames after hitting a breakpoint and running step http://bugs.python.org/issue13183 reopened by loewis #14428: … [View More]

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Python program name
by Vinay Sajip May 4, 2012

May 4, 2012

IIUC, the program name of the Python executable is set to whatever argv[0] is. Is there a reason for this, rather than using one of the various OS-specific APIs [1] for getting the name of the running executable? The reason I ask is that in a virtual environment (venv), the exe's path is the only thing you have to go on, and if you don't have that, you can't find the pyvenv.cfg file and hence the base Python from which the venv was created. Of course argv[0] is normally set to the executable's … [View More]

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Re: [Python-Dev] [Python-checkins] cpython: avoid unitialized memory
by Eric V. Smith May 4, 2012

May 4, 2012

On 5/4/2012 1:14 AM, benjamin.peterson wrote: > http://hg.python.org/cpython/rev/b0deafca6c02 > changeset: 76743:b0deafca6c02 > user: Benjamin Peterson <benjamin(a)python.org> > date: Fri May 04 01:14:03 2012 -0400 > summary: > avoid unitialized memory > > files: > Modules/posixmodule.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > > diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c > --- a/… [View More]

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Re: [Python-Dev] [Python-checkins] cpython: Issue #14127: Add ns= parameter to utime, futimes, and lutimes.
by Benjamin Peterson May 4, 2012

May 4, 2012

2012/5/3 larry.hastings <python-checkins(a)python.org>: > diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c > --- a/Modules/posixmodule.c > +++ b/Modules/posixmodule.c > @@ -3572,28 +3572,194 @@ > #endif /* HAVE_UNAME */ > > > +static int > +split_py_long_to_s_and_ns(PyObject *py_long, time_t *s, long *ns) > +{ > + int result = 0; > + PyObject *divmod; > + divmod = PyNumber_Divmod(py_long, billion)… [View More]; > + if (!divmod) > + goto exit; > + *s = _PyLong_AsTime_t(PyTuple_GET_ITEM(divmod, 0)); > + if ((*s == -1) && PyErr_Occurred()) > + goto exit; > + *ns = PyLong_AsLong(PyTuple_GET_ITEM(divmod, 1)); > + if ((*s == -1) && PyErr_Occurred()) > + goto exit; > + > + result = 1; > +exit: > + Py_XDECREF(divmod); > + return result; > +} > + > + > +typedef int (*parameter_converter_t)(PyObject *, void *); > + > +typedef struct { > + /* input only */ > + char path_format; > + parameter_converter_t converter; > + char *function_name; > + char *first_argument_name; > + PyObject *args; > + PyObject *kwargs; > + > + /* input/output */ > + PyObject **path; > + > + /* output only */ > + int now; > + time_t atime_s; > + long atime_ns; > + time_t mtime_s; > + long mtime_ns; > +} utime_arguments; > + > +#define DECLARE_UA(ua, fname) \ > + utime_arguments ua; \ > + memset(&ua, 0, sizeof(ua)); \ > + ua.function_name = fname; \ > + ua.args = args; \ > + ua.kwargs = kwargs; \ > + ua.first_argument_name = "path"; \ > + > +/* UA_TO_FILETIME doesn't declare atime and mtime for you */ > +#define UA_TO_FILETIME(ua, atime, mtime) \ > + time_t_to_FILE_TIME(ua.atime_s, ua.atime_ns, &atime); \ > + time_t_to_FILE_TIME(ua.mtime_s, ua.mtime_ns, &mtime) > + > +/* the rest of these macros declare the output variable for you */ > +#define UA_TO_TIMESPEC(ua, ts) \ > + struct timespec ts[2]; \ > + ts[0].tv_sec = ua.atime_s; \ > + ts[0].tv_nsec = ua.atime_ns; \ > + ts[1].tv_sec = ua.mtime_s; \ > + ts[1].tv_nsec = ua.mtime_ns > + > +#define UA_TO_TIMEVAL(ua, tv) \ > + struct timeval tv[2]; \ > + tv[0].tv_sec = ua.atime_s; \ > + tv[0].tv_usec = ua.atime_ns / 1000; \ > + tv[1].tv_sec = ua.mtime_s; \ > + tv[1].tv_usec = ua.mtime_ns / 1000 > + > +#define UA_TO_UTIMBUF(ua, u) \ > + struct utimbuf u; \ > + utimbuf.actime = ua.atime_s; \ > + utimbuf.modtime = ua.mtime_s > + > +#define UA_TO_TIME_T(ua, timet) \ > + time_t timet[2]; \ > + timet[0] = ua.atime_s; \ > + timet[1] = ua.mtime_s > + > + > +/* > + * utime_read_time_arguments() processes arguments for the utime > + * family of functions. > + * returns zero on failure. > + */ > +static int > +utime_read_time_arguments(utime_arguments *ua) > +{ > + PyObject *times = NULL; > + PyObject *ns = NULL; > + char format[24]; > + char *kwlist[4]; > + char **kw = kwlist; > + int return_value; > + > + *kw++ = ua->first_argument_name; > + *kw++ = "times"; > + *kw++ = "ns"; > + *kw = NULL; > + > + sprintf(format, "%c%s|O$O:%s", > + ua->path_format, > + ua->converter ? "&" : "", > + ua->function_name); > + > + if (ua->converter) > + return_value = PyArg_ParseTupleAndKeywords(ua->args, ua->kwargs, > + format, kwlist, ua->converter, ua->path, &times, &ns); > + else > + return_value = PyArg_ParseTupleAndKeywords(ua->args, ua->kwargs, > + format, kwlist, ua->path, &times, &ns); > + > + if (!return_value) > + return 0; > + > + if (times && ns) { > + PyErr_Format(PyExc_RuntimeError, Why not a ValueError or TypeError? > + "%s: you may specify either 'times'" > + " or 'ns' but not both", > + ua->function_name); > + return 0; > + } > + > + if (times && (times != Py_None)) { Conditions in parenthesis like this is not style. > + if (!PyTuple_CheckExact(times) || (PyTuple_Size(times) != 2)) { > + PyErr_Format(PyExc_TypeError, > + "%s: 'time' must be either" > + " a valid tuple of two ints or None", > + ua->function_name); > + return 0; > + } > + ua->now = 0; > + return (_PyTime_ObjectToTimespec(PyTuple_GET_ITEM(times, 0), > + &(ua->atime_s), &(ua->atime_ns)) != -1) > + && (_PyTime_ObjectToTimespec(PyTuple_GET_ITEM(times, 1), Put && on previous line like Python. > + &(ua->mtime_s), &(ua->mtime_ns)) != -1); > + } > + > + if (ns) { > + if (!PyTuple_CheckExact(ns) || (PyTuple_Size(ns) != 2)) { > + PyErr_Format(PyExc_TypeError, > + "%s: 'ns' must be a valid tuple of two ints", > + ua->function_name); > + return 0; > + } > + ua->now = 0; > + return (split_py_long_to_s_and_ns(PyTuple_GET_ITEM(ns, 0), > + &(ua->atime_s), &(ua->atime_ns))) > + && (split_py_long_to_s_and_ns(PyTuple_GET_ITEM(ns, 1), > + &(ua->mtime_s), &(ua->mtime_ns))); > + } > + > + /* either times=None, or neither times nor ns was specified. use "now". */ > + ua->now = 1; > + return 1; > +} -- Regards, Benjamin [View Less]

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PEP 377 : Allow __enter__() methods to skip the statement body : real world case
by Pierre Chanial May 4, 2012

May 4, 2012

Hello, PEP 377 has been rejected for lack of use cases. Here is one. I'm writing an MPI-based application and in some cases, when there is less work items than processes, I need to create a new communicator excluding the processes that have nothing to do. This new communicator should finally be freed by the processes that had work to do (and only by them). If there is more work than processes, the usual communicator should be used. A neat way to do that would be to write: with filter_comm(… [View More]

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Re: [Python-Dev] cpython: Issue #14127: Fix two bugs with the Windows implementation.
by Georg Brandl May 4, 2012

May 4, 2012

On 05/04/2012 11:32 AM, larry.hastings wrote: > http://hg.python.org/cpython/rev/fc5d2f4291ac > changeset: 76747:fc5d2f4291ac > user: Larry Hastings <larry(a)hastings.org> > date: Fri May 04 02:31:57 2012 -0700 > summary: > Issue #14127: Fix two bugs with the Windows implementation. Would be nice to mention what these bugs were, otherwise the commit message is not very helpful when doing e.g. bisect or annotate. Georg

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Re: [Python-Dev] [Python-checkins] cpython: what is a invalid tuple?
by Stefan Krah May 4, 2012

May 4, 2012

benjamin.peterson <python-checkins(a)python.org> wrote: > files: > Modules/posixmodule.c | 4 ++-- > 1 files changed, 2 insertions(+), 2 deletions(-) > > > diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c > --- a/Modules/posixmodule.c > +++ b/Modules/posixmodule.c > @@ -3702,7 +3702,7 @@ > if (!PyTuple_CheckExact(times) || (PyTuple_Size(times) != 2)) { > PyErr_Format(PyExc_TypeError, > "%s: … [View More]

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Re: [Python-Dev] [Python-checkins] cpython: avoid unitialized memory
by Stefan Krah May 4, 2012

May 4, 2012

benjamin.peterson <python-checkins(a)python.org> wrote: > summary: > avoid unitialized memory > > diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c > --- a/Modules/posixmodule.c > +++ b/Modules/posixmodule.c > @@ -3576,7 +3576,7 @@ > split_py_long_to_s_and_ns(PyObject *py_long, time_t *s, long *ns) > { > int result = 0; > - PyObject *divmod; > + PyObject *divmod = NULL; > divmod = PyNumber_Divmod(py_long, billion); > … [View More]

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