Mailman 3 July 2012 - Python-checkins

cpython: Update the string limit in the faulthandler documentations
by victor.stinner July 30, 2012

July 30, 2012

http://hg.python.org/cpython/rev/dc9402c3db92 changeset: 78342:dc9402c3db92 user: Victor Stinner <victor.stinner(a)gmail.com> date: Tue Jul 31 03:25:28 2012 +0200 summary: Update the string limit in the faulthandler documentations files: Doc/library/faulthandler.rst | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/Doc/library/faulthandler.rst b/Doc/library/faulthandler.rst --- a/Doc/library/faulthandler.rst +++ b/Doc/library/faulthandler.rst @@ -23,7 +23,7 @@ * Only ASCII is supported. The ``backslashreplace`` error handler is used on encoding. -* Each string is limited to 100 characters. +* Each string is limited to 500 characters. * Only the filename, the function name and the line number are displayed. (no source code) * It is limited to 100 frames and 100 threads. -- Repository URL: http://hg.python.org/cpython

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cpython: Fix initialization of the faulthandler module
by victor.stinner July 30, 2012

July 30, 2012

http://hg.python.org/cpython/rev/2f1494d243ad changeset: 78341:2f1494d243ad user: Victor Stinner <victor.stinner(a)gmail.com> date: Tue Jul 31 02:55:49 2012 +0200 summary: Fix initialization of the faulthandler module faulthandler requires the importlib if "-X faulthandler" option is present on the command line, so initialize faulthandler after importlib. Add also an unit test. files: Lib/test/test_faulthandler.py | 15 +++++++++++++++ Python/pythonrun.c | 8 ++++---- 2 files changed, 19 insertions(+), 4 deletions(-) diff --git a/Lib/test/test_faulthandler.py b/Lib/test/test_faulthandler.py --- a/Lib/test/test_faulthandler.py +++ b/Lib/test/test_faulthandler.py @@ -7,6 +7,7 @@ import subprocess import sys from test import support, script_helper +from test.script_helper import assert_python_ok import tempfile import unittest @@ -256,6 +257,20 @@ finally: sys.stderr = orig_stderr + def test_disabled_by_default(self): + # By default, the module should be disabled + code = "import faulthandler; print(faulthandler.is_enabled())" + rc, stdout, stderr = assert_python_ok("-c", code) + stdout = (stdout + stderr).strip() + self.assertEqual(stdout, b"False") + + def test_sys_xoptions(self): + # Test python -X faulthandler + code = "import faulthandler; print(faulthandler.is_enabled())" + rc, stdout, stderr = assert_python_ok("-X", "faulthandler", "-c", code) + stdout = (stdout + stderr).strip() + self.assertEqual(stdout, b"True") + def check_dump_traceback(self, filename): """ Explicitly call dump_traceback() function and check its output. diff --git a/Python/pythonrun.c b/Python/pythonrun.c --- a/Python/pythonrun.c +++ b/Python/pythonrun.c @@ -356,10 +356,6 @@ _PyImportHooks_Init(); - /* initialize the faulthandler module */ - if (_PyFaulthandler_Init()) - Py_FatalError("Py_Initialize: can't initialize faulthandler"); - /* Initialize _warnings. */ _PyWarnings_Init(); @@ -368,6 +364,10 @@ import_init(interp, sysmod); + /* initialize the faulthandler module */ + if (_PyFaulthandler_Init()) + Py_FatalError("Py_Initialize: can't initialize faulthandler"); + _PyTime_Init(); if (initfsencoding(interp) < 0) -- Repository URL: http://hg.python.org/cpython

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cpython: Minor markup tweak.
by brett.cannon July 30, 2012

July 30, 2012

http://hg.python.org/cpython/rev/d56b647f325a changeset: 78340:d56b647f325a user: Brett Cannon <brett(a)python.org> date: Mon Jul 30 19:31:00 2012 -0400 summary: Minor markup tweak. files: Doc/library/functions.rst | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -1507,7 +1507,7 @@ use :func:`importlib.import_module`. .. versionchanged:: 3.3 - Negative values for 'level' are no longer supported. + Negative values for *level* are no longer supported. .. rubric:: Footnotes -- Repository URL: http://hg.python.org/cpython

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cpython: Add a versionchanged mention to __import__ in regards to negative level values.
by brett.cannon July 30, 2012

July 30, 2012

http://hg.python.org/cpython/rev/231d98a38eec changeset: 78339:231d98a38eec user: Brett Cannon <brett(a)python.org> date: Mon Jul 30 18:35:17 2012 -0400 summary: Add a versionchanged mention to __import__ in regards to negative level values. files: Doc/library/functions.rst | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -1506,6 +1506,9 @@ If you simply want to import a module (potentially within a package) by name, use :func:`importlib.import_module`. + .. versionchanged:: 3.3 + Negative values for 'level' are no longer supported. + .. rubric:: Footnotes -- Repository URL: http://hg.python.org/cpython

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cpython: Issue #15508: Fix the docstring for __import__ to not mention negative
by brett.cannon July 30, 2012

July 30, 2012

http://hg.python.org/cpython/rev/2a4ca86cc2b7 changeset: 78338:2a4ca86cc2b7 parent: 78336:2f3ccf4ec193 user: Brett Cannon <brett(a)python.org> date: Mon Jul 30 17:45:54 2012 -0400 summary: Issue #15508: Fix the docstring for __import__ to not mention negative 'level' values and set its document default value to 0. Thanks to Arfrever Frehtes Taifersar Arahesis for filing the bug. files: Misc/NEWS | 4 ++++ Python/bltinmodule.c | 5 ++--- 2 files changed, 6 insertions(+), 3 deletions(-) diff --git a/Misc/NEWS b/Misc/NEWS --- a/Misc/NEWS +++ b/Misc/NEWS @@ -10,6 +10,10 @@ Core and Builtins ----------------- +- Issue #15508: Fix the docstring for __import__ to have the proper default + value of 0 for 'level' and to not mention negative levels since they are + not supported. + - Issue #15425: Eliminated traceback noise from more situations involving importlib diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c --- a/Python/bltinmodule.c +++ b/Python/bltinmodule.c @@ -195,7 +195,7 @@ } PyDoc_STRVAR(import_doc, -"__import__(name, globals={}, locals={}, fromlist=[], level=-1) -> module\n\ +"__import__(name, globals={}, locals={}, fromlist=[], level=0) -> module\n\ \n\ Import a module. Because this function is meant for use by the Python\n\ interpreter and not for general use it is better to use\n\ @@ -208,8 +208,7 @@ When importing a module from a package, note that __import__('A.B', ...)\n\ returns package A when fromlist is empty, but its submodule B when\n\ fromlist is not empty. Level is used to determine whether to perform \n\ -absolute or relative imports. -1 is the original strategy of attempting\n\ -both absolute and relative imports, 0 is absolute, a positive number\n\ +absolute or relative imports. 0 is absolute while a positive number\n\ is the number of parent directories to search relative to the current module."); -- Repository URL: http://hg.python.org/cpython

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Re: [Python-checkins] [Python-Dev] peps: Update PEP-0424 with respect to feedback received.
by Andrew Svetlov July 30, 2012

July 30, 2012

Sure, GvR covered my question in much more clean way in http://code.activestate.com/lists/python-dev/117152/ On Mon, Jul 30, 2012 at 9:49 PM, Ifthikhan Nazeem <iftecan2000(a)gmail.com> wrote: > The question is not very clear. Are you asking whether function arguments > can have default parameters? > > -- > Thanks > Iftikhan Nazeem > LinkedIn : http://ae.linkedin.com/in/ifthikhan > > > On Mon, Jul 30, 2012 at 11:23 AM, Andrew Svetlov <andrew.svetlov(a)gmail.com> > wrote: >> >> On Mon, Jul 30, 2012 at 4:10 AM, alex.gaynor <python-checkins(a)python.org> >> wrote: >> >> > +In addition, a new function ``operator.length`` hint is added >> >> ``operator.length`` or ``operator.length_hint``? >> >> > + def length_hint(obj, default): >> Is there default value for `default` parameter? >> For example: >> >> def length_hint(obj, default=0): >> pass >> >> or something like that? >> >> -- >> Thanks, >> Andrew Svetlov >> _______________________________________________ >> Python-Dev mailing list >> Python-Dev(a)python.org >> http://mail.python.org/mailman/listinfo/python-dev >> Unsubscribe: >> http://mail.python.org/mailman/options/python-dev/iftecan2000%40gmail.com > > -- Thanks, Andrew Svetlov

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peps: Grammar fix.
by brett.cannon July 30, 2012

July 30, 2012

http://hg.python.org/peps/rev/2cf5fd8a64ee changeset: 4496:2cf5fd8a64ee user: Brett Cannon <brett(a)python.org> date: Mon Jul 30 14:37:57 2012 -0400 summary: Grammar fix. files: pep-0424.txt | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/pep-0424.txt b/pep-0424.txt --- a/pep-0424.txt +++ b/pep-0424.txt @@ -34,7 +34,7 @@ estimate. It may not return a negative value (else a ValueError is raised). In addition, a new function ``operator.length_hint`` hint is added, -with the follow semantics (which define how ``__length_hint__`` should +with the following semantics (which define how ``__length_hint__`` should be used):: def length_hint(obj, default=0): -- Repository URL: http://hg.python.org/peps

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peps: Improve and accept PEP 424 (__length_hint__).
by guido.van.rossum July 30, 2012

July 30, 2012

http://hg.python.org/peps/rev/fa104e5c1abe changeset: 4495:fa104e5c1abe user: Guido van Rossum <guido(a)google.com> date: Mon Jul 30 10:12:18 2012 -0700 summary: Improve and accept PEP 424 (__length_hint__). files: pep-0424.txt | 66 ++++++++++++++++++++++----------------- 1 files changed, 37 insertions(+), 29 deletions(-) diff --git a/pep-0424.txt b/pep-0424.txt --- a/pep-0424.txt +++ b/pep-0424.txt @@ -3,7 +3,7 @@ Version: $Revision$ Last-Modified: $Date Author: Alex Gaynor <alex.gaynor(a)gmail.com> -Status: Draft +Status: Accepted Type: Standards Track Content-Type: text/x-rst Created: 14-July-2012 @@ -13,18 +13,19 @@ Abstract ======== -CPython currently defines an ``__length_hint__`` method on several types, such -as various iterators. This method is then used by various other functions (such -as ``list``) to presize lists based on the estimated returned by -``__length_hint__``. Types can then define ``__length_hint__`` which are not -sized, and thus should not define ``__len__``, but can estimate or compute a -size (such as many iterators). +CPython currently defines a ``__length_hint__`` method on several +types, such as various iterators. This method is then used by various +other functions (such as ``list``) to presize lists based on the +estimate returned by ``__length_hint__``. Types which are not sized, +and thus should not define ``__len__``, can then define +``__length_hint__``, to allow estimating or computing a size (such as +many iterators). -Proposal -======== +Specification +============= -This PEP proposes formally documenting ``__length_hint__`` for other -interpreter and non-standard library Python to implement. +This PEP formally documents ``__length_hint__`` for other +interpreters and non-standard-library Python modules to implement. ``__length_hint__`` must return an integer (else a TypeError is raised) or ``NotImplemented, and is not required to be accurate. It may return a value @@ -32,21 +33,23 @@ return value of ``NotImplemented`` indicates that there is no finite length estimate. It may not return a negative value (else a ValueError is raised). -In addition, a new function ``operator.length`` hint is added, having the -follow semantics (which define how ``__length_hint__`` should be used:: +In addition, a new function ``operator.length_hint`` hint is added, +with the follow semantics (which define how ``__length_hint__`` should +be used):: - def length_hint(obj, default): + def length_hint(obj, default=0): + """Return an estimate of the number of items in obj. + + This is useful for presizing containers when building from an + iterable. + + If the object supports len(), the result will be + exact. Otherwise, it may over- or under-estimate by an + arbitrary amount. The result will be an integer >= 0. """ - Return an estimate of the number of items in obj. This is - useful for presizing containers when building from an iterable. - - If the object supports len(), the result will be exact. Otherwise, it - may over or underestimate by an arbitrary amount. The result will be an - integer >= 0. - """ - try: + if <obj has a __len__ method>: return len(obj) - except TypeError: + else: try: get_hint = obj.__length_hint__ except AttributeError: @@ -55,13 +58,18 @@ if hint is NotImplemented: return default if not isinstance(hint, int): - raise TypeError("Length hint must be an integer, not %r" % type(hint)) - if hint < 0: - raise ValueError("Length hint (%r) must be >= 0" % hint) - return hint + raise TypeError("Length hint must be an integer, not %r" % + type(hint)) + return max(hint, 0) -Callers are required to provide a default value, because there is no sane -return value for objects which do not provide a length or length hint. +Note: there is no good way to spell "obj has a __len__ method" in pure +Python. In CPython, this comes down to checking for a ``sq_length`` +slot. Other implementations presumably have their own way of +checking. Calling ``len(obj)`` and catching TypeError is not quite +correct (as it would assume no __len__ method exists when in fact one +exists but calling it raises TypeError); checking ``hasattr(obj, +'__len__')`` likewise is incorrect if obj is a class defining a +``__len__`` method for its instances. Rationale -- Repository URL: http://hg.python.org/peps

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cpython (2.7): Issue #12288: Consider '0' and '0.0' as valid initialvalue for tkinter
by andrew.svetlov July 30, 2012

July 30, 2012

http://hg.python.org/cpython/rev/f98e2944cb40 changeset: 78337:f98e2944cb40 branch: 2.7 parent: 78330:e0eb7dea245f user: Andrew Svetlov <andrew.svetlov(a)gmail.com> date: Mon Jul 30 20:04:53 2012 +0300 summary: Issue #12288: Consider '0' and '0.0' as valid initialvalue for tkinter SimpleDialog. files: Lib/lib-tk/tkSimpleDialog.py | 2 +- Misc/ACKS | 1 + Misc/NEWS | 3 +++ 3 files changed, 5 insertions(+), 1 deletions(-) diff --git a/Lib/lib-tk/tkSimpleDialog.py b/Lib/lib-tk/tkSimpleDialog.py --- a/Lib/lib-tk/tkSimpleDialog.py +++ b/Lib/lib-tk/tkSimpleDialog.py @@ -200,7 +200,7 @@ self.entry = Entry(master, name="entry") self.entry.grid(row=1, padx=5, sticky=W+E) - if self.initialvalue: + if self.initialvalue is not None: self.entry.insert(0, self.initialvalue) self.entry.select_range(0, END) diff --git a/Misc/ACKS b/Misc/ACKS --- a/Misc/ACKS +++ b/Misc/ACKS @@ -576,6 +576,7 @@ Mike Meyer Steven Miale Trent Mick +Tom Middleton Stan Mihai Aristotelis Mikropoulos Damien Miller diff --git a/Misc/NEWS b/Misc/NEWS --- a/Misc/NEWS +++ b/Misc/NEWS @@ -92,6 +92,9 @@ Library ------- +- Issue #12288: Consider '0' and '0.0' as valid initialvalue + for tkinter SimpleDialog. + - Issue #15489: Add a __sizeof__ implementation for BytesIO objects. Patch by Serhiy Storchaka. -- Repository URL: http://hg.python.org/cpython

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cpython (merge 3.2 -> default): Issue #12288: Consider '0' and '0.0' as valid initialvalue for tkinter
by andrew.svetlov July 30, 2012

July 30, 2012

http://hg.python.org/cpython/rev/2f3ccf4ec193 changeset: 78336:2f3ccf4ec193 parent: 78334:e77c117ab024 parent: 78335:fd5166fdb978 user: Andrew Svetlov <andrew.svetlov(a)gmail.com> date: Mon Jul 30 20:01:13 2012 +0300 summary: Issue #12288: Consider '0' and '0.0' as valid initialvalue for tkinter SimpleDialog. files: Lib/tkinter/simpledialog.py | 2 +- Misc/ACKS | 1 + Misc/NEWS | 3 +++ 3 files changed, 5 insertions(+), 1 deletions(-) diff --git a/Lib/tkinter/simpledialog.py b/Lib/tkinter/simpledialog.py --- a/Lib/tkinter/simpledialog.py +++ b/Lib/tkinter/simpledialog.py @@ -282,7 +282,7 @@ self.entry = Entry(master, name="entry") self.entry.grid(row=1, padx=5, sticky=W+E) - if self.initialvalue: + if self.initialvalue is not None: self.entry.insert(0, self.initialvalue) self.entry.select_range(0, END) diff --git a/Misc/ACKS b/Misc/ACKS --- a/Misc/ACKS +++ b/Misc/ACKS @@ -700,6 +700,7 @@ Alexis Métaireau Steven Miale Trent Mick +Tom Middleton Stan Mihai Stefan Mihaila Aristotelis Mikropoulos diff --git a/Misc/NEWS b/Misc/NEWS --- a/Misc/NEWS +++ b/Misc/NEWS @@ -339,6 +339,9 @@ Library ------- +- Issue #12288: Consider '0' and '0.0' as valid initialvalue + for tkinter SimpleDialog. + - Issue #15489: Add a __sizeof__ implementation for BytesIO objects. Patch by Serhiy Storchaka. -- Repository URL: http://hg.python.org/cpython

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