Mailman 3 May 2011 - Python-Dev

Simple XML-RPC server over SSL/TLS
by Marc Garcia May 16, 2011

May 16, 2011

Hi there, I'm working on a project where I'm using Python's simple XML-RPC server [1] on Python 3.x. I need to use it over TLS, which is not possible directly, but it's pretty simple to implement extending few classes of the standard library. But what I would like to know, is if is there any reason why XML-RPC can't optionally work over TLS/SSL using Python's ssl module. I'll create a ticket, and send a patch, but I was wondering if it was a reason why this was not implemented. Cheers, Marc 1. http://docs.python.org/dev/library/xmlrpc.server.html

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Re: [Python-Dev] Python Support on OpenVMS
by Mathew, Sandeep (OpenVMS) May 16, 2011

May 16, 2011

Hi All, Thanks for your responses!. First thing on my radar is to get buildbot working on OpenVMS. I had a quick glance at source, although buildbot is written purely in python it has many platform specific issues. See: https://github.com/buildbot/buildbot/blob/master/master/README.w32 However I am guessing that it may not be very difficult to resolve. I will concentrating on Itanium systems initially and will later port it to Alpha in a similar way. I have requested for an account in HP's OpenVMS cluster meant for open source development. I will kick off my work after the account has been activated! Regards Sandeep Mathew

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Python Support on OpenVMS
by Mathew, Sandeep (OpenVMS) May 16, 2011

May 16, 2011

Hi Folks, I am Sandeep Mathew from OpenVMS engineering in Hewlett-Packard. I have worked on various components of the OpenVMS operating system including MONITOR, TDF, EXEC, LIBRTL, DCL and SYSMAN. I happened to read this blog post about dropping OpenVMS support for further releases of python here: http://blog.python.org/2011/05/python-33-to-drop-support-for-os2.html. I am willing to spend time and effort to ensure that python remains supported on OpenVMS. Please let me know what needs to be done for continued OpenVMS Support in Python. Looking forward to working with the Python community. Regards Sandeep Mathew

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more timely detection of unbound locals
by Eli Bendersky May 15, 2011

May 15, 2011

Hi all, It's a known Python gotcha (*) that the following code: x = 5 def foo(): print(x) x = 1 print(x) foo() Will throw: UnboundLocalError: local variable 'x' referenced before assignment On the usage of 'x' in the *first* print. Recently, while reading the zillionth question on StackOverflow on some variation of this case, I started thinking whether this behavior is desired or just an implementation artifact. IIUC, the reason it behaves this way is that the symbol table logic goes over the code before the code generation runs, sees the assignment 'x = 1` and marks 'x' as local in foo. Then, the code generator generates LOAD_FAST for all loads of 'x' in 'foo', even though 'x' is actually bound locally after the first print. When the bytecode is run, since it's LOAD_FAST and no store was made into the local 'x', ceval.c then throws the exception. On first sight, it's possible to signal that 'x' truly becomes local only after it's bound in the scope (and before that LOAD_NAME can be generated for it instead of LOAD_FAST). To do this, some modifications to the symbol table creation and usage are required, because we can no longer say "x is local in this block", but rather should attach scope information to each instance of "x". This has some overhead, but it's only at the compilation stage so it shouldn't have a real effect on the runtime of Python code. This is also less convenient and "clean" than the current approach - this is why I'm wondering whether the behavior is an artifact of the implementation. Would it not be worth to make Python's behavior more expected in this case, at the cost of some implementation complexity? What are the cons to making such a change? At least judging by the amount of people getting confused by it, maybe it's in line with the zen of Python to behave more explicitly here. Thanks in advance, Eli (*) Variation of this FAQ: http://docs.python.org/faq/programming.html#why-am-i-getting-an-unboundloca…

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AUTO: Jon K Peck is out of the office (returning 05/18/2011)
by Jon K Peck May 14, 2011

May 14, 2011

I am out of the office until 05/18/2011. I am out of the office traveling Wed - Thursday, May 11-12 and Saturday-Tuesday, May 14-17. I will have limited access to email during this time, so I will be delayed in responding. Note: This is an automated response to your message "Python-Dev Digest, Vol 94, Issue 25" sent on 5/14/11 4:00:03. This is the only notification you will receive while this person is away.

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Summary of Python tracker Issues
by Python tracker May 13, 2011

May 13, 2011

ACTIVITY SUMMARY (2011-05-06 - 2011-05-13) 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 2784 ( +1) closed 21069 (+52) total 23853 (+53) Open issues with patches: 1198 Issues opened (36) ================== #6011: python doesn't build if prefix contains non-ascii characters http://bugs.python.org/issue6011 reopened by haypo #11786: ConfigParser.[Raw]ConfigParser optionxform() http://bugs.python.org/issue11786 reopened by eric.araujo #11873: test_regexp() of test_compileall fails occassionally http://bugs.python.org/issue11873 reopened by haypo #11977: Document int.conjugate, .denominator, ... http://bugs.python.org/issue11977 reopened by georg.brandl #12019: Dead or buggy code in importlib.test.__main__ http://bugs.python.org/issue12019 opened by eric.araujo #12020: Attribute error with flush on stdout,stderr http://bugs.python.org/issue12020 opened by Jimbofbx #12021: mmap.read requires an argument http://bugs.python.org/issue12021 opened by rich-noir #12022: AttributeError should report the same details when raised by l http://bugs.python.org/issue12022 opened by dholth #12024: 2.6 svn and hg branches are out of sync http://bugs.python.org/issue12024 opened by barry #12026: Support more of MSI api http://bugs.python.org/issue12026 opened by markm #12028: threading._get_ident(): remove it in the doc and make it publi http://bugs.python.org/issue12028 opened by haypo #12029: ABC registration of Exceptions http://bugs.python.org/issue12029 opened by acooke #12034: check_GetFinalPathNameByHandle() suboptimal http://bugs.python.org/issue12034 opened by pitrou #12037: test_email failures under Windows with the eol extension activ http://bugs.python.org/issue12037 opened by pitrou #12038: assertEqual doesn't display newline differences quite well http://bugs.python.org/issue12038 opened by pitrou #12040: Expose a Process.sentinel property (and fix polling loop in Pr http://bugs.python.org/issue12040 opened by pitrou #12042: What's New multiprocessing example error http://bugs.python.org/issue12042 opened by davipo #12043: Update shutil documentation http://bugs.python.org/issue12043 opened by sandro.tosi #12045: external shell command executed twice in ctypes.util._get_sona http://bugs.python.org/issue12045 opened by pitrou #12046: Windows build identification incomplete http://bugs.python.org/issue12046 opened by loewis #12048: Python 3, ZipFile Bug In Chinese http://bugs.python.org/issue12048 opened by yaoyu #12049: expose RAND_bytes() function of OpenSSL http://bugs.python.org/issue12049 opened by haypo #12050: unconsumed_tail of zlib.Decompress is not always cleared on de http://bugs.python.org/issue12050 opened by Takeshi.Yoshino #12053: Add prefetch() for Buffered IO (experiment) http://bugs.python.org/issue12053 opened by jcon #12055: doctest not working on nested functions http://bugs.python.org/issue12055 opened by dabrahams #12057: HZ codec has no test http://bugs.python.org/issue12057 opened by haypo #12059: hashlib does not handle missing hash functions correctly http://bugs.python.org/issue12059 opened by Ian.Wienand #12060: Python doesn't support real time signals http://bugs.python.org/issue12060 opened by haypo #12063: tokenize module appears to treat unterminated single and doubl http://bugs.python.org/issue12063 opened by Devin Jeanpierre #12065: test_ssl failure when svn.python.org fails to resolve http://bugs.python.org/issue12065 opened by r.david.murray #12066: Empty ('') xmlns attribute is not properly handled by xml.dom. http://bugs.python.org/issue12066 opened by atamyrat #12067: Doc: remove errors about mixed-type comparisons. http://bugs.python.org/issue12067 opened by terry.reedy #12068: test_logging failure in test_rollover http://bugs.python.org/issue12068 opened by pitrou #12069: test_signal.test_without_siginterrupt() failure on AMD64 OpenI http://bugs.python.org/issue12069 opened by haypo #12070: Unlimited loop in sysconfig._parse_makefile() http://bugs.python.org/issue12070 opened by haypo #12071: test_concurrent_futures.test_context_manager_shutdown() hangs http://bugs.python.org/issue12071 opened by haypo Most recent 15 issues with no replies (15) ========================================== #12071: test_concurrent_futures.test_context_manager_shutdown() hangs http://bugs.python.org/issue12071 #12069: test_signal.test_without_siginterrupt() failure on AMD64 OpenI http://bugs.python.org/issue12069 #12066: Empty ('') xmlns attribute is not properly handled by xml.dom. http://bugs.python.org/issue12066 #12063: tokenize module appears to treat unterminated single and doubl http://bugs.python.org/issue12063 #12059: hashlib does not handle missing hash functions correctly http://bugs.python.org/issue12059 #12055: doctest not working on nested functions http://bugs.python.org/issue12055 #12053: Add prefetch() for Buffered IO (experiment) http://bugs.python.org/issue12053 #12045: external shell command executed twice in ctypes.util._get_sona http://bugs.python.org/issue12045 #12043: Update shutil documentation http://bugs.python.org/issue12043 #12037: test_email failures under Windows with the eol extension activ http://bugs.python.org/issue12037 #12034: check_GetFinalPathNameByHandle() suboptimal http://bugs.python.org/issue12034 #12029: ABC registration of Exceptions http://bugs.python.org/issue12029 #12024: 2.6 svn and hg branches are out of sync http://bugs.python.org/issue12024 #12019: Dead or buggy code in importlib.test.__main__ http://bugs.python.org/issue12019 #11992: sys.settrace doesn't disable tracing if a local trace function http://bugs.python.org/issue11992 Most recent 15 issues waiting for review (15) ============================================= #12060: Python doesn't support real time signals http://bugs.python.org/issue12060 #12059: hashlib does not handle missing hash functions correctly http://bugs.python.org/issue12059 #12057: HZ codec has no test http://bugs.python.org/issue12057 #12049: expose RAND_bytes() function of OpenSSL http://bugs.python.org/issue12049 #12040: Expose a Process.sentinel property (and fix polling loop in Pr http://bugs.python.org/issue12040 #12026: Support more of MSI api http://bugs.python.org/issue12026 #12018: No tests for ntpath.samefile, ntpath.sameopenfile http://bugs.python.org/issue12018 #12015: possible characters in temporary file name is too few http://bugs.python.org/issue12015 #12014: str.format parses replacement field incorrectly http://bugs.python.org/issue12014 #12008: HtmlParser non-strict goes wrong with unquoted attributes http://bugs.python.org/issue12008 #12004: PyZipFile.writepy gives internal error on syntax errors http://bugs.python.org/issue12004 #12002: ftplib.FTP.abort fails with TypeError on Python 3.x http://bugs.python.org/issue12002 #11999: sporadic failure in test_mailbox http://bugs.python.org/issue11999 #11998: test_signal cannot test blocked signals if _tkinter is loaded; http://bugs.python.org/issue11998 #11996: libpython.py: nicer py-bt output http://bugs.python.org/issue11996 Top 10 most discussed issues (10) ================================= #11948: Tutorial/Modules - small fix to better clarify the modules sea http://bugs.python.org/issue11948 15 msgs #6727: ImportError when package is symlinked on Windows http://bugs.python.org/issue6727 14 msgs #8407: expose signalfd(2) and pthread_sigmask in the signal module http://bugs.python.org/issue8407 14 msgs #11877: Change os.fsync() to support physical backing store syncs http://bugs.python.org/issue11877 14 msgs #12015: possible characters in temporary file name is too few http://bugs.python.org/issue12015 12 msgs #9205: Parent process hanging in multiprocessing if children terminat http://bugs.python.org/issue9205 10 msgs #10666: OS X installer variants have confusing readline differences http://bugs.python.org/issue10666 10 msgs #12057: HZ codec has no test http://bugs.python.org/issue12057 10 msgs #5723: Incomplete json tests http://bugs.python.org/issue5723 9 msgs #12010: Compile fails when sizeof(wchar_t) == 1 http://bugs.python.org/issue12010 9 msgs Issues closed (51) ================== #1195: Problems on Linux with Ctrl-D and Ctrl-C during raw_input http://bugs.python.org/issue1195 closed by haypo #1350: IDLE - CallTips enhancement - show full doc-string in new wind http://bugs.python.org/issue1350 closed by kbk #5154: OSX broken poll testing doesn't work http://bugs.python.org/issue5154 closed by ronaldoussoren #5559: IDLE Output Window 's goto fails when path has spaces http://bugs.python.org/issue5559 closed by kbk #8498: Cannot use backlog = 0 for sockets http://bugs.python.org/issue8498 closed by pitrou #8808: imaplib should support SSL contexts http://bugs.python.org/issue8808 closed by pitrou #9971: Optimize BufferedReader.readinto http://bugs.python.org/issue9971 closed by pitrou #10169: socket.sendto raises incorrect exception when passed incorrect http://bugs.python.org/issue10169 closed by ezio.melotti #10419: distutils command build_scripts fails with UnicodeDecodeError http://bugs.python.org/issue10419 closed by python-dev #11072: Add MLSD command support to ftplib http://bugs.python.org/issue11072 closed by giampaolo.rodola #11164: xml shouldn't use _xmlplus http://bugs.python.org/issue11164 closed by python-dev #11347: libpython3.so: Broken soname and linking http://bugs.python.org/issue11347 closed by python-dev #11607: Apllication crashes when saving file http://bugs.python.org/issue11607 closed by ronaldoussoren #11617: Sporadic failure in test_httpservers http://bugs.python.org/issue11617 closed by haypo #11743: Rewrite PipeConnection and Connection in pure Python http://bugs.python.org/issue11743 closed by pitrou #11799: urllib HTTP authentication behavior with unrecognized auth met http://bugs.python.org/issue11799 closed by orsenthil #11888: Add C99's log2() function to the math library http://bugs.python.org/issue11888 closed by haypo #11896: Save on Close fails in IDLE, from Linux system http://bugs.python.org/issue11896 closed by kbk #11910: test_heapq C tests are not skipped when _heapq is missing http://bugs.python.org/issue11910 closed by ezio.melotti #11916: A few errnos from OSX http://bugs.python.org/issue11916 closed by python-dev #11927: SMTP_SSL doesn't use port 465 by default http://bugs.python.org/issue11927 closed by pitrou #11962: Buildbot reliability http://bugs.python.org/issue11962 closed by skrah #11968: wsgiref's wsgi application sample code does not work http://bugs.python.org/issue11968 closed by orsenthil #11972: input does not strip a trailing newline correctly on Windows http://bugs.python.org/issue11972 closed by terry.reedy #11994: [2.7/gcc-4.4.3] Segfault under valgrind in string.split() http://bugs.python.org/issue11994 closed by haypo #12001: Extend json.dumps to handle N-triples strings http://bugs.python.org/issue12001 closed by terry.reedy #12011: The signal module should raise OSError for OS-related exceptio http://bugs.python.org/issue12011 closed by haypo #12012: _ssl module doesn't compile with OpenSSL 1.0.0d: SSLv2_method http://bugs.python.org/issue12012 closed by haypo #12013: file /usr/local/lib/python3.1/lib-dynload/_socket.so: symbol i http://bugs.python.org/issue12013 closed by eric.araujo #12017: Decoding a highly-nested object with json (_speedups enabled) http://bugs.python.org/issue12017 closed by ezio.melotti #12023: non causal behavior http://bugs.python.org/issue12023 closed by ezio.melotti #12025: strangely missing separator in "resource" table http://bugs.python.org/issue12025 closed by jcea #12027: Optimize import this (patch to make it 10x faster) http://bugs.python.org/issue12027 closed by rhettinger #12030: Roundup Refused Update with No text/plain http://bugs.python.org/issue12030 closed by benjamin.peterson #12031: subprocess module does not accept file twice http://bugs.python.org/issue12031 closed by neologix #12032: Tools/Scripts/crlv.py needs updating for python 3+ http://bugs.python.org/issue12032 closed by python-dev #12033: AttributeError: 'module' object has no attribute 'scipy' http://bugs.python.org/issue12033 closed by alex #12035: problem with installing validator.nu on windows http://bugs.python.org/issue12035 closed by amaury.forgeotdarc #12036: ConfigParser: Document items() added the vars dictionary to th http://bugs.python.org/issue12036 closed by python-dev #12039: test_logging: bad file descriptor on FreeBSD bot http://bugs.python.org/issue12039 closed by vinay.sajip #12041: test_os test_ctypes test_wait3 causes test_wait3 error http://bugs.python.org/issue12041 closed by pitrou #12044: subprocess.Popen.__exit__ doesn't wait for process end http://bugs.python.org/issue12044 closed by brian.curtin #12047: Expand the style guide http://bugs.python.org/issue12047 closed by rhettinger #12051: Segfaults in _json while encoding objects http://bugs.python.org/issue12051 closed by ezio.melotti #12052: round() erroneous for some large arguments http://bugs.python.org/issue12052 closed by mark.dickinson #12054: test_socket: replace custom _get_unused_port() by support.find http://bugs.python.org/issue12054 closed by pitrou #12056: "…" (HORIZONTAL ELLIPSIS) should be an alternative syntax fo http://bugs.python.org/issue12056 closed by benjamin.peterson #12058: Minor edits to comments in faulthandler http://bugs.python.org/issue12058 closed by ezio.melotti #12061: Remove duplicate 'key functions' entry in Glossary http://bugs.python.org/issue12061 closed by georg.brandl #12062: Buffered I/O inconsistent with unbuffered I/O in certain cases http://bugs.python.org/issue12062 closed by pitrou #12064: unexpected behavior with exception variable http://bugs.python.org/issue12064 closed by ezio.melotti

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Problems with regrtest and with logging
by Éric Araujo May 13, 2011

May 13, 2011

Hi, Sorry for quick email-battery dying. regrtest helpfully reports when a test leaves the environment unclean (sys.path, os.environ, logging._handlerList), but I think the implementation is buggy: it compares object identity and then value. Why is comparing identity useful? I’d just use ==. It makes writing cleanup code easier (just use addCleanup(setattr, obj, 'attr', copy(obj.attr))). Second: in packaging, we have two modules that create a logging handler. I’m not sure how if we should change the code or fix the tests to restore the _handlerList, or how. Thanks for advice. Regards

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Re: [Python-Dev] Problems with regrtest and with logging
by Vinay Sajip May 13, 2011

May 13, 2011

Éric Araujo <merwok <at> netwok.org> writes: > Yep, probably dead code. I think that an handler should be defined > only once, in the “if __name__ == '__main__'” block. Am I right? Just > like you don’t call sys.exit from library code (hello optparse!), you > don’t set logging handlers in library code, only in the outmost layer of > the script. That's right, though it's OK to provide a documented convenience API for adding handlers. > The problem is that Dispatcher or Distribution get the quiet or verbose > options from the command-line deep in the library code, and want to use > it to configure the log level on the handler, which I’ve just said > should be set up at a much higher level. To solve this, I’m going to > add a *logginghandler* argument to Dispatcher/Distribution; that way, > the creation of the handler will happen only once and at a high level, > but the command-line parsing code will be able to set the log handler > from the command-line arguments. :) You don't necessarily need to set the level on the handler - why can you not just set it on the logger? The effect would often be the same: the logger's level is checked first, and then the handler's level. Generally you set levels on handlers when you want specific behaviour, such as all ERROR and above to a particular file, all CRITICAL to an email handler etc. For command-line scripts outputting to the console and nowhere else, usually you could just add a StreamHandler (with no level set on it), and set the level on the logger. Where the functionality may be used in an API, you should perhaps check logger.hasHandlers() and avoid adding handlers if there are already some added by a using library or application. Regards, Vinay Sajip

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Re: [Python-Dev] [Python-checkins] cpython (3.1): Fix for issue 10684: Folders get deleted when trying to change case with
by Éric Araujo May 13, 2011

May 13, 2011

Hi, Le 06/05/2011 11:32, ronald.oussoren a écrit : > http://hg.python.org/cpython/rev/26da299ca88e > summary: > Fix for issue 10684: Folders get deleted when trying to change case with shutil.move (case insensitive file systems only) > > - except OSError: > + except OSError as exc: > if os.path.isdir(src): > if _destinsrc(src, dst): > raise Error("Cannot move a directory '%s' into itself '%s'." % (src, dst)) Is this change a debugging leftover? Regards

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Re: [Python-Dev] [Python-checkins] Python Regression Test Failures doc (1)
by Éric Araujo May 13, 2011

May 13, 2011

Hi, Le 08/05/2011 22:00, Neal Norwitz a écrit : > rm -rf build/* > rm -rf tools/sphinx > rm -rf tools/pygments > rm -rf tools/jinja2 > rm -rf tools/docutils > Checking out Sphinx... > svn: PROPFIND request failed on '/projects/external/Sphinx-0.6.5/sphinx' > svn: PROPFIND of '/projects/external/Sphinx-0.6.5/sphinx': Could not resolve hostname `svn.python.org': Host not found (http://svn.python.org) > make: *** [checkout] Error 1 I always wonder about these messages. They’re mostly error messages recently; what are python-checkins subscribers supposed to do in reaction? In non-error mode, what are they useful for? Thanks in advance for enlightening me. Regards

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