Re: How does a dictionary work exactly?
On Thursday, July 16, 2015 at 2:59:02 PM UTC-4, Skip Montanaro wrote: On Thu, Jul 16, 2015 at 1:36 PM, yoursurrogate...@gmail.com yoursurrogate...@gmail.com wrote: If I understand correctly, lookup would not be a constant, yes? On the contrary, that's what you desire, nearly constant time execution. To the greatest extent possible, you want the linked lists to be of length zero or one. Part of the magic is in figuring out good places to expand the size of the hash array. You don't want it to grow too big, but you still want most linked lists to be very short. The resize operation isn't done too often because it itself is expensive. I believe Python dicts start out with an overly large initial hash array (again, dredging up old memories of threads on python-dev) as an optimization to avoid lots of early resize operations. Skip Maybe people are reading a different implementation than I am. Python's dict object doesn't use linked lists to deal with hash collisions, it probes other slots instead. Brandon Rhodes did a great talk about how dicts work: http://pyvideo.org/video/276/the-mighty-dictionary-55 BTW: The Python 3 implementation is more complicated than in Python 2, I think to deal with sharing keys among dictionaries that have the same set of keys. --Ned. -- https://mail.python.org/mailman/listinfo/python-list
[issue24654] PEP 492 - example benchmark doesn't work (TypeError)
New submission from Marcin Szewczyk: Using benchmark from the section https://www.python.org/dev/peps/pep-0492/#async-await raises: Traceback (most recent call last): File ./bench.py, line 28, in module timeit(abinary, 19, 30) File ./bench.py, line 23, in timeit list(gen(depth)) TypeError: 'coroutine' object is not iterable Am I missing something or is a correction needed in code or documentation? BTW, PEP 492 uses the term plain generator, but unlike generator-based coroutine or native coroutine it's not defined in section https://www.python.org/dev/peps/pep-0492/#glossary. I think adding a definition would be beneficial. -- assignee: docs@python components: Documentation, asyncio messages: 246856 nosy: docs@python, gvanrossum, haypo, wodny, yselivanov priority: normal severity: normal status: open title: PEP 492 - example benchmark doesn't work (TypeError) type: enhancement versions: Python 3.5 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24654 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: ANN: eGenix PyRun - One file Python Runtime 2.1.0
Hi Alex, On 17.07.2015 00:58, Alex wrote: Do you have Python 2.7 64bit versions available for Solaris (10/11) x86/SPARC, AIX, and HP-UX IA/RISC? I've had the displeasure of having to install 64bit Python on Solaris and AIX and it's an experience I would not recommend even though OpenCSW and Perzl have done much of the legwork already. I'd also just be happy with any pointers to building PyRun or regular Python on such systems if such currently there exist no such builds. We don't currently have direct access to these types of systems, so cannot provide regular builds for these platforms. For AIX and Solaris x86 we do provide custom paid support to get our software ported, if you're interested in this. Thanks, -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Jul 17 2015) Python Projects, Coaching and Consulting ... http://www.egenix.com/ mxODBC Plone/Zope Database Adapter ... http://zope.egenix.com/ mxODBC, mxDateTime, mxTextTools ...http://python.egenix.com/ 2015-07-20: EuroPython 2015, Bilbao, Spain ... 3 days to go 2015-07-29: Python Meeting Duesseldorf ... 12 days to go : Try our mxODBC.Connect Python Database Interface for free ! :: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/ On Wed, May 13, 2015 at 10:34 AM, Cristiano Cortezia cristiano.corte...@gmail.com wrote: In one of the next releases we'll probably add a tool to bundle complete applications together with pyrun, perhaps even by recompiling it to include the application byte code files right in the binary like we do for the stdlib. Well, that would be simply awesome. Looking forward to it. PS: you guys should definitely advertise this work on the embedded software community. 2015-05-13 11:29 GMT-03:00 M.-A. Lemburg m...@egenix.com: On 13.05.2015 16:09, Cristiano Cortezia wrote: Well I gave it a try, and it seems my assumptions were *somehow* true. Here is what I got when running one of my apps in single shot mode (load, run, terminate): *default python distribution* total time 9.022s ENOENT's count 7377 *pyrun* total time 8.455s ENOENT's count 3064 So, it indeed failed much less to open files, but I guess this didn't make that much difference after all (500ms). PyRun has the advantage of being able to read the byte code directly from the binary (using memory mapping). However, it still needs to run the same startup machinery as Python itself. Note that startup time for Python was a lot worse before Python used the same approach as PyRun to compile in the parsed sysconfig data. Perhaps it is because this app has some external dependencies (22 to be precise) not bundled on pyrun that had to be scanned by the interpreter anyway. If by any means we could bundle them all the same way, than it could bring a much higher performance gain. But I guess it is not really safe-feasible. It's certainly possible to use the pyrun build system to create bundles with more packages and tools included. The one we're shipping has most of the stdlib included, but leaves all the application code to reside on the sys.path or in a ZIP archive. In one of the next releases we'll probably add a tool to bundle complete applications together with pyrun, perhaps even by recompiling it to include the application byte code files right in the binary like we do for the stdlib. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, May 13 2015) Python Projects, Coaching and Consulting ... http://www.egenix.com/ mxODBC Plone/Zope Database Adapter ... http://zope.egenix.com/ mxODBC, mxDateTime, mxTextTools ...http://python.egenix.com/ 2015-05-13: Released mxODBC Connect 2.1.3 ... http://egenix.com/go75 2015-05-11 http://egenix.com/go752015-05-11: Released eGenix PyRun 2.1.0 ... http://egenix.com/go74 2015-05-25 http://egenix.com/go742015-05-25: PyWaw Summit 2015, Warsaw, Poland ... 12 days to go eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/ -- https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list
Re: Possibly Pythonic Tail Call Optimization (TCO/TRE)
On Fri, Jul 17, 2015 at 9:43 PM, Antoon Pardon antoon.par...@rece.vub.ac.be wrote: On 07/17/2015 01:05 PM, Chris Angelico wrote: On Fri, Jul 17, 2015 at 8:48 PM, Antoon Pardon antoon.par...@rece.vub.ac.be wrote: Just wondering, are traceback records of generators available? They are if an exception is raised in the generator itself, but what if an exception is raised in the loop that is driven by a generator. They don't appear in the standard stack trace. Not sure what you mean here. Something like this? def gen(): yield stuff yield more stuff for stuff in gen(): bomb with exception The error didn't happen in the generator, so I wouldn't expect to see it in the traceback. Yes something like that. And I wouldn't expect it either but if it is not present, is it because nobody thought about it or because it is a bad idea or an idea difficult to implement? There's still room for the cause of an error to not be in the traceback; imagine, for instance, a function that populates a concrete list, and then you iterate over the list. If that function sticks a None into the list and the subsequent processing is expecting all strings, that's going to bomb, but then you have to figure out where the None came from. If the traceback could include that, it'd be great, but some things aren't possible. Sure, but in this case, the generator is still active. The Runtime would be able to jump to and somehow activates it's stack record for the next value. So why would we expect it to be impossible to include this trace back record in a stack trace? Python could also give you stack traces for any other threads that are concurrently running, on the off-chance that one of them affected it. But the only influence the generator has on the loop is to yield a value or signal termination; if an exception is thrown in the loop itself, the local name 'stuff' should have all the information about that cause. Python isn't a mind-reader, no matter how much it may look like one, and it can't know that this function's return value should be shown as part of a completely different function's stack trace. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Possibly Pythonic Tail Call Optimization (TCO/TRE)
On 07/17/2015 01:05 PM, Chris Angelico wrote: On Fri, Jul 17, 2015 at 8:48 PM, Antoon Pardon antoon.par...@rece.vub.ac.be wrote: Just wondering, are traceback records of generators available? They are if an exception is raised in the generator itself, but what if an exception is raised in the loop that is driven by a generator. They don't appear in the standard stack trace. Not sure what you mean here. Something like this? def gen(): yield stuff yield more stuff for stuff in gen(): bomb with exception The error didn't happen in the generator, so I wouldn't expect to see it in the traceback. Yes something like that. And I wouldn't expect it either but if it is not present, is it because nobody thought about it or because it is a bad idea or an idea difficult to implement? There's still room for the cause of an error to not be in the traceback; imagine, for instance, a function that populates a concrete list, and then you iterate over the list. If that function sticks a None into the list and the subsequent processing is expecting all strings, that's going to bomb, but then you have to figure out where the None came from. If the traceback could include that, it'd be great, but some things aren't possible. Sure, but in this case, the generator is still active. The Runtime would be able to jump to and somehow activates it's stack record for the next value. So why would we expect it to be impossible to include this trace back record in a stack trace? Doesn't mean we're happy to sacrifice other functionality. Indeed, this is an independend problem. Whatever the answer here doesn't need to affect how one feels about losing trace back record because of TCO. -- https://mail.python.org/mailman/listinfo/python-list
Re: Possibly Pythonic Tail Call Optimization (TCO/TRE)
On 07/17/2015 01:49 PM, Chris Angelico wrote: On Fri, Jul 17, 2015 at 9:43 PM, Antoon Pardon antoon.par...@rece.vub.ac.be wrote: Sure, but in this case, the generator is still active. The Runtime would be able to jump to and somehow activates it's stack record for the next value. So why would we expect it to be impossible to include this trace back record in a stack trace? Python could also give you stack traces for any other threads that are concurrently running, on the off-chance that one of them affected it. But the only influence the generator has on the loop is to yield a value or signal termination; if an exception is thrown in the loop itself, the local name 'stuff' should have all the information about that cause. But the local name 'stuff' may only have the information for the immediate cause. The underlying cause may be available in the generator. Suppose you have a generator that should only generate positive numbers that you use to divide some other number by. Your loop crashes because of a DivideByZeroError Sure the local name shows the dividor to be zero, but you have no information on why your generator produced a zero, but there may be a clue in the trace back record of the generator. Python isn't a mind-reader, no matter how much it may look like one, and it can't know that this function's return value should be shown as part of a completely different function's stack trace. It is not a matter of mindreading. And it is not a completely different functions stack trace. It is the trace back record of a generator that is used by the process/thread that crashed. And AFAIK an active generator belongs to one specific thread. You can't have it yield a value to a different thread and you can't send it a value from an other thread. So I really see no reason to exclude the trace back records of active generators from a stack trace of a crashed thread. -- Antoon Pardon -- https://mail.python.org/mailman/listinfo/python-list
Re: ANN: eGenix PyRun - One file Python Runtime 2.1.0
They don't offer any free versions for those systems and their licenses are quite expensive. On Fri, Jul 17, 2015 at 2:26 AM, Laura Creighton l...@openend.se wrote: I think Activestate makes a Python 2.y for Solaris. http://www.activestate.com/activepython I've never used it. Laura In a message of Thu, 16 Jul 2015 18:58:37 -0400, Alex writes: Do you have Python 2.7 64bit versions available for Solaris (10/11) x86/SPARC, AIX, and HP-UX IA/RISC? I've had the displeasure of having to install 64bit Python on Solaris and AIX and it's an experience I would not recommend even though OpenCSW and Perzl have done much of the legwork already. I'd also just be happy with any pointers to building PyRun or regular Python on such systems if such currently there exist no such builds. On Wed, May 13, 2015 at 10:34 AM, Cristiano Cortezia cristiano.corte...@gmail.com wrote: In one of the next releases we'll probably add a tool to bundle complete applications together with pyrun, perhaps even by recompiling it to include the application byte code files right in the binary like we do for the stdlib. Well, that would be simply awesome. Looking forward to it. PS: you guys should definitely advertise this work on the embedded software community. 2015-05-13 11:29 GMT-03:00 M.-A. Lemburg m...@egenix.com: On 13.05.2015 16:09, Cristiano Cortezia wrote: Well I gave it a try, and it seems my assumptions were *somehow* true. Here is what I got when running one of my apps in single shot mode (load, run, terminate): *default python distribution* total time 9.022s ENOENT's count 7377 *pyrun* total time 8.455s ENOENT's count 3064 So, it indeed failed much less to open files, but I guess this didn't make that much difference after all (500ms). PyRun has the advantage of being able to read the byte code directly from the binary (using memory mapping). However, it still needs to run the same startup machinery as Python itself. Note that startup time for Python was a lot worse before Python used the same approach as PyRun to compile in the parsed sysconfig data. Perhaps it is because this app has some external dependencies (22 to be precise) not bundled on pyrun that had to be scanned by the interpreter anyway. If by any means we could bundle them all the same way, than it could bring a much higher performance gain. But I guess it is not really safe-feasible. It's certainly possible to use the pyrun build system to create bundles with more packages and tools included. The one we're shipping has most of the stdlib included, but leaves all the application code to reside on the sys.path or in a ZIP archive. In one of the next releases we'll probably add a tool to bundle complete applications together with pyrun, perhaps even by recompiling it to include the application byte code files right in the binary like we do for the stdlib. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, May 13 2015) Python Projects, Coaching and Consulting ... http://www.egenix.com/ mxODBC Plone/Zope Database Adapter ... http://zope.egenix.com/ mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/ 2015-05-13: Released mxODBC Connect 2.1.3 ... http://egenix.com/go75 2015-05-11 http://egenix.com/go752015-05-11: Released eGenix PyRun 2.1.0 ... http://egenix.com/go74 2015-05-25 http://egenix.com/go742015-05-25: PyWaw Summit 2015, Warsaw, Poland ... 12 days to go eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/ -- https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list
[issue24644] --help for runnable stdlib modules
Ezio Melotti added the comment:
writing tests for the CLI are a pain too
It shouldn't be particularly difficult to do it using
script_helper.assert_python_{ok|failure}(), even though you could also check
the argument /parsing/ separately without having to launch a subprocess.
--
nosy: +ezio.melotti
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[issue24635] test_typing is flaky
Guido van Rossum added the comment: You can list me as the expert for typing.py, since I wrote it. :-) (However, until mid August I have limited availability since I'm on vacation.) This looks indeed like a test order dependency. The three failures are all basic failures where an empty set, dict or list is expected to be an instance of the corresponding ABC (AbstractSet, Mapping, Sequence) defined in typing.py. Those ABCs in turn derive (in a slightly sneaky way) from the corresponding ABCs in collections.abc. My hunch is that some other test messes with the ABC registration cache and doesn't restore it -- or typing.py's sneaky way of deriving from collections.abc has a subtle bug in it. Maybe something is calling reload(collections.abc)? I haven't done any research to confirm or deny this theory. It shouldn't be too hard to find the (probably only a handful of) tests that mess with the registration cache. -- nosy: +gvanrossum ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24635 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24644] --help for runnable stdlib modules
R. David Murray added the comment: Yes, that's pretty much why things are in the state they are in ;) Still, opening individual issues for help problems with individual modules is the way to go, as you did (thank you). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24644 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23792] help crash leaves terminal in echo off mode
R. David Murray added the comment: Well, not exactly. While the title was inaccurate, the real problem was the management of the subprocess, not what mode the terminal was in. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23792 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: Possibly Pythonic Tail Call Optimization (TCO/TRE)
On Fri, Jul 17, 2015 at 10:54 PM, Antoon Pardon antoon.par...@rece.vub.ac.be wrote: On 07/17/2015 01:49 PM, Chris Angelico wrote: On Fri, Jul 17, 2015 at 9:43 PM, Antoon Pardon antoon.par...@rece.vub.ac.be wrote: Sure, but in this case, the generator is still active. The Runtime would be able to jump to and somehow activates it's stack record for the next value. So why would we expect it to be impossible to include this trace back record in a stack trace? Python could also give you stack traces for any other threads that are concurrently running, on the off-chance that one of them affected it. But the only influence the generator has on the loop is to yield a value or signal termination; if an exception is thrown in the loop itself, the local name 'stuff' should have all the information about that cause. But the local name 'stuff' may only have the information for the immediate cause. The underlying cause may be available in the generator. Suppose you have a generator that should only generate positive numbers that you use to divide some other number by. Your loop crashes because of a DivideByZeroError Sure the local name shows the dividor to be zero, but you have no information on why your generator produced a zero, but there may be a clue in the trace back record of the generator. Indeed, but there's nothing special about generators here. The same sequence could have been a concrete list, or it could have been some other kind of iterator (any object with __iter__ and __next__), which won't have a stack frame. Special cases aren't special enough to warp exception handling around. Python isn't a mind-reader, no matter how much it may look like one, and it can't know that this function's return value should be shown as part of a completely different function's stack trace. It is not a matter of mindreading. And it is not a completely different functions stack trace. It is the trace back record of a generator that is used by the process/thread that crashed. And AFAIK an active generator belongs to one specific thread. You can't have it yield a value to a different thread and you can't send it a value from an other thread. So I really see no reason to exclude the trace back records of active generators from a stack trace of a crashed thread. No, generators are fine across threads: rosuav@sikorsky:~$ python3 threadgen.py Starting! First yielded value Continuing! Second yielded value Terminating. Traceback (most recent call last): File threadgen.py, line 20, in module print(next(gen)) StopIteration rosuav@sikorsky:~$ cat threadgen.py import threading import time def thread(): time.sleep(0.5) print(next(gen)) threading.Thread(target=thread).start() def generator():rosuav@sikorsky:~$ print(Starting!) yield First yielded value print(Continuing!) yield Second yielded value print(Terminating.) gen = generator() print(next(gen)) time.sleep(1) print(next(gen)) rosuav@sikorsky:~$ In fact, a generator doesn't have a stack unless it's currently executing, so all you could get is whatever's actually inside it (that is, if there's a deep tree of 'yield from's, you could dig up that part of the stack). I'm not sure this would really help you very much. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
[issue24621] zipfile.BadZipFile: File is not a zip file
Serhiy Storchaka added the comment: not_working.zip has 85972 extra null bytes at the end. This doesn't look as common ZIP file, and adding support such files can be considered as new feature (if it is worth to do at all). How did you get this file Yasar? -- type: behavior - enhancement versions: +Python 3.6 -Python 2.7, Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24621 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: Fwd: PROBLEM IN importing PIL
In a message of Fri, 17 Jul 2015 09:18:46 +0530, rahul tiwari writes: I want to import PIL package but every time this is showing error no PIL module find . plz suggest me how i can fix this problem. Get Pillow. Instructions on how to install it here: https://pillow.readthedocs.org/installation.html#basic-installation Laura -- https://mail.python.org/mailman/listinfo/python-list
Re: ANN: eGenix PyRun - One file Python Runtime 2.1.0
I think Activestate makes a Python 2.y for Solaris. http://www.activestate.com/activepython I've never used it. Laura In a message of Thu, 16 Jul 2015 18:58:37 -0400, Alex writes: Do you have Python 2.7 64bit versions available for Solaris (10/11) x86/SPARC, AIX, and HP-UX IA/RISC? I've had the displeasure of having to install 64bit Python on Solaris and AIX and it's an experience I would not recommend even though OpenCSW and Perzl have done much of the legwork already. I'd also just be happy with any pointers to building PyRun or regular Python on such systems if such currently there exist no such builds. On Wed, May 13, 2015 at 10:34 AM, Cristiano Cortezia cristiano.corte...@gmail.com wrote: In one of the next releases we'll probably add a tool to bundle complete applications together with pyrun, perhaps even by recompiling it to include the application byte code files right in the binary like we do for the stdlib. Well, that would be simply awesome. Looking forward to it. PS: you guys should definitely advertise this work on the embedded software community. 2015-05-13 11:29 GMT-03:00 M.-A. Lemburg m...@egenix.com: On 13.05.2015 16:09, Cristiano Cortezia wrote: Well I gave it a try, and it seems my assumptions were *somehow* true. Here is what I got when running one of my apps in single shot mode (load, run, terminate): *default python distribution* total time 9.022s ENOENT's count 7377 *pyrun* total time 8.455s ENOENT's count 3064 So, it indeed failed much less to open files, but I guess this didn't make that much difference after all (500ms). PyRun has the advantage of being able to read the byte code directly from the binary (using memory mapping). However, it still needs to run the same startup machinery as Python itself. Note that startup time for Python was a lot worse before Python used the same approach as PyRun to compile in the parsed sysconfig data. Perhaps it is because this app has some external dependencies (22 to be precise) not bundled on pyrun that had to be scanned by the interpreter anyway. If by any means we could bundle them all the same way, than it could bring a much higher performance gain. But I guess it is not really safe-feasible. It's certainly possible to use the pyrun build system to create bundles with more packages and tools included. The one we're shipping has most of the stdlib included, but leaves all the application code to reside on the sys.path or in a ZIP archive. In one of the next releases we'll probably add a tool to bundle complete applications together with pyrun, perhaps even by recompiling it to include the application byte code files right in the binary like we do for the stdlib. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, May 13 2015) Python Projects, Coaching and Consulting ... http://www.egenix.com/ mxODBC Plone/Zope Database Adapter ... http://zope.egenix.com/ mxODBC, mxDateTime, mxTextTools ...http://python.egenix.com/ 2015-05-13: Released mxODBC Connect 2.1.3 ... http://egenix.com/go75 2015-05-11 http://egenix.com/go752015-05-11: Released eGenix PyRun 2.1.0 ... http://egenix.com/go74 2015-05-25 http://egenix.com/go742015-05-25: PyWaw Summit 2015, Warsaw, Poland ... 12 days to go eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/ -- https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list -- https://mail.python.org/mailman/listinfo/python-list
Re: Noob in Python. Problem with fairly simple test case
On Fri, 17 Jul 2015 01:01 pm, Chris Angelico wrote: On Fri, Jul 17, 2015 at 12:44 PM, Steven D'Aprano st...@pearwood.info wrote: My take from all this is that overall, Python 3 take-up is probably around 10% of all Python users... Really? That low? Wow. Well, that's based on a guess that for every Python programmer you see talking on the Internet, on Stackoverflow, Usenet, etc. there are probably ten or so who are invisible to us. They work a nominally 9 to 5 government or corporate job programming in Python, are forbidden to install packages which aren't approved by IT, and don't even have access to Stackoverflow let alone have time to chew the fat here. Those folks, I expect, are almost all using Python 2.6 or 2.7, with a small minority on even older versions. Some small percentage of them will still be using Python 2 in 20 years time, just as there are a small minority of people still using Python 1.5 today. Jessie's default should be 2.7, at least. Wheezy shipped 2.7, too; it's only Squeeze (now out of support) that didn't ship any 2.7.x Python. Are you sure you can't at least upgrade to 2.7? I'm not sure, I'm not actively involved in that specific project. All I know is that the guys are always complaining about Jessie, and that they're using 2.6. -- Steven -- https://mail.python.org/mailman/listinfo/python-list
[issue24652] C-API Pure Embedding enhancement
New submission from Justin Huang: From the example in here: https://docs.python.org/2/extending/embedding.html#pure-embedding when directly using the example (compiling and trying with external file etc.) it doesn't work right away. Instead an extra line: PySys_SetArgv(argc, argv); must be added to get it to work. -- messages: 246847 nosy: Justin Huang priority: normal severity: normal status: open title: C-API Pure Embedding enhancement type: enhancement versions: Python 2.7 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24652 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21750] mock_open data is visible only once for the life of the class
Roundup Robot added the comment: New changeset 41d55ac50dea by Robert Collins in branch '3.4': Issue #21750: mock_open.read_data can now be read from each instance, as it https://hg.python.org/cpython/rev/41d55ac50dea New changeset 0da764c58322 by Robert Collins in branch '3.5': Issue #21750: mock_open.read_data can now be read from each instance, as it https://hg.python.org/cpython/rev/0da764c58322 New changeset 92a90e469424 by Robert Collins in branch 'default': Issue #21750: mock_open.read_data can now be read from each instance, as it https://hg.python.org/cpython/rev/92a90e469424 -- nosy: +python-dev ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21750 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: A new module for performing tail-call elimination
On 07/16/2015 08:58 PM, Steven D'Aprano wrote: Nice of you to illustrate how being pedantic about something, can make a response useless with regard to the intended original question. Just because your intention in giving that code was X, doesn't mean that others cannot use that code to also do Y. Your example of a mutually recursive pair of functions is perfectly fine as a toy example to demonstrate a point. But the fact that people can only come up with toy examples to demonstrate the uses of unbounded recursion is telling. That's *my* point. It's orthogonal to your point. We know your point. You have repeated it often enough. There is no need to keep bringing it up and certainly not where your point is irrelevant. People are allowed to not care about your point. People may think it is not worth the trouble trying to convince people who are skeptical and may choose to discuss possible directions with people who are likewise intressed. So why do you find it necessary to appear here and repeat your point, that is already known, but is not cared about much and irrelevant here. I'm not here to satisfy your or anyone else's curiosity. Fair enough. What are you here for? When you complain that Python doesn't have TCO, is your intent to persuade people that it should, with the ultimate aim to changing Python so that it gains TCO? If not, then what? I don't complain that Python doesn't have TCO. I am intressed in the subject and I'm willing to discuss the pro and cons, how it could be simulated, and how good some arguments for or against it are. But I don't think any outcome here will have much weight in getting it implemented and although I would prefer having it, I can perfectly live without. So don't translate my interest in the subject into a complaint about python not having it. I'm also not interrested in convincing people who show a dislike for it. If the toy examples here, don't ignite a spark of imagination about how in some circumstance this could be useful for you, then I am not interessed in showing you. -- https://mail.python.org/mailman/listinfo/python-list
Re: Noob in Python. Problem with fairly simple test case
On Fri, 17 Jul 2015 02:15 pm, Rick Johnson wrote: On Thursday, July 16, 2015 at 9:44:56 PM UTC-5, Steven D'Aprano wrote: [...] My take from all this is that overall, Python 3 take-up is probably around 10% of all Python users, All that rambling just to agree with me? My educated guess is a minimum of 75% still using Python2.x. But i'll take your 90% because it makes my argument stronger! O:-D 75% or 90% is not a vast majority. Vast majority implies more than 99%. But regardless of the precise meaning of vast, if you want to dismiss one in four people (25%) or one in ten (10%) as inconsequential, then you've got some serious issues. [...] Well i'm not actively hostile to py3 by any means, i just can't risk the upgrade at this time. You can't risk the upgrade? What precisely are you afraid of? The take-up rate of Python 3 is about where we would expect after less than seven years: Well, that's one way of coping with it. I know a lot of folks worked hard to get Python3 up and running, but they need to realize that these sort of transitions take time. Rick, you're being patronising. Before even a single line of code was written for Python 3, Guido and the core developers knew that there would be a long migration path from 2 to 3. Hence the parallel versions, and the long transition plan: * Python 2.6 and Python 3.0 came out more or less together, and 2.6 was explicitly designed as a transitional version with a number of Python 3 features available via __future___ imports; * Python 2.7 has an extended maintenance period; instead of the usual 2-3 years, 2.7 will be maintained for 10 years (until 2020); * there will also be at least three more years of commercial third-party maintenance available from companies like Red Hat. The core developers don't need to be told that these sort of transitions take time. They predicted almost from the beginning that it would take 10 years for the transition. They didn't commit to a long period of parallel versions because they *like* having twice as much work to do. Heck, there is always the possibility that Python3 never gets any real traction. Until it's usage reaches 50%, it's only spinning tires in the mud, digging a deeper hole. That's nonsense. Spinning tires implies no forward motion. Python 3 usage is *certainly* moving forward: we've gone from the situation in 2008 of nobody using it, to the current situation where there's lots of activity around it: students learning on Python 3, books about it, the avant-garde and early adopters have already moved to Python 3, and the majority of libraries also support Python 3. The chances of that forward motion coming to a stop are very slim. The work being done on async and concurrency for Python 3.5 is getting lots of people excited, and Red Hat and Debian have committed to migrating to Python 3. Where they go, Centos, Fedora, Mint and (probably) Ubuntu are sure to follow, and quite quickly too. My guess is, the rate of Python 3 adoption is going to hit the tipping point in 2 or 3 years, after which time it will be *very* rapid. Not to mention the elephant in the room: We have been moving towards mobile and cloud ubiquity, and this trend is not going to stop. If Python wants to survive it had better start adapting, and adapting fast. If not, it shall become just another forgotten language relegated to obscurity within the dark corners of academia. Yeah, right. Like academic computer scientists use Python. Whatever way you look at it, Python is one of the top 10 programming languages. It's at no risk of becoming forgotten any time soon. http://import-that.dreamwidth.org/1388.html -- Steven -- https://mail.python.org/mailman/listinfo/python-list
[issue24650] Error in yield expression documentation
New submission from swanson: https://docs.python.org/3/reference/expressions.html in 6.2.9. Yield expressions end of 1st paragraph: Using a yield expression in a function’s body causes that function to be a generator. NO! As the very next sentence explains, a generator is what's returned by such a function, not the function itself. Basically, it should be sufficient to add the word function to the end of that sentence: ... generator function. However, this error does NOT exist in 3.0 to 3.2 - just in 3.3 to 3.6, so I suggest just using the same wording as 3.0 to 3.2: Using a yield expression in a function definition is sufficient to cause that definition to create a generator function instead of a normal function. -- assignee: docs@python components: Documentation messages: 246841 nosy: docs@python, swanson priority: normal severity: normal status: open title: Error in yield expression documentation versions: Python 3.3, Python 3.4, Python 3.5, Python 3.6 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24650 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21750] mock_open data is visible only once for the life of the class
Berker Peksag added the comment: There are already explicit tests for that Great, then the test is fine :) Thanks for writing the patch. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21750 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21750] mock_open data is visible only once for the life of the class
Robert Collins added the comment: Ok, so - good to commit to 3.4 and up? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21750 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24651] Mock.assert* API is in user namespace
New submission from Robert Collins: We had a discussion on the list sparked by the assret checking, and in it I proposed that the API would be cleaner if the asserts were module functions. e.g. rather than:: a_mock.assert_called_with(Foo) assert_called_with(a_mock, Foo) Michael has objected to this saying that the current structure is part of mock's success - but I'm filing this since a number of other core devs seemed to really like the idea. We can discuss here and if the consensus is that it wouldn't be an improvement - thats fine. OTOH if the consensus is that it is an improvement, this can serve as a memo to someone to implement the new API. -- components: Library (Lib) messages: 246846 nosy: rbcollins priority: normal severity: normal status: open title: Mock.assert* API is in user namespace type: enhancement versions: Python 3.6 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24651 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24651] Mock.assert* API is in user namespace
Changes by Robert Collins robe...@robertcollins.net: -- nosy: +berker.peksag, kushal.das, michael.foord ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24651 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue23792] help crash leaves terminal in echo off mode
swanson added the comment: Changing the title in case anyone else is looking for this bug. This is not raw mode. It's just that echo is turned off. It is sufficient to type (invisibly, of course): stty echo to resume normal use of the terminal. -- nosy: +swanson title: help crash leaves terminal in raw mode - help crash leaves terminal in echo off mode ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue23792 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: A new module for performing tail-call elimination
On 16/07/2015 17:17, Ian Kelly wrote: On Thu, Jul 16, 2015 at 3:28 AM, Robin Becker ro...@reportlab.com wrote: . I believe the classic answer is Ackermann's function http://demonstrations.wolfram.com/RecursionInTheAckermannFunction/ which is said to be not primitive recursive ie cannot be unwound into loops; not sure whether that implies it has to be recursively defined or can perhaps be broken down some other way. that should have said simple loops My recollection -- and it's been awhile since I've studied computability theory so I may be distorting things here -- is that primitive recursive functions can be computed using for loops, i.e. loops where the number of iterations is bounded in advance, whereas non-primitive recursive functions require while loops. I'm guessing, but is the implication that for loops can be specified finitely in advance, but while loops need some processing in the calculation to determine termination? I'm an engineer :( -- Robin Becker -- https://mail.python.org/mailman/listinfo/python-list
Re: A new module for performing tail-call elimination
On 07/16/2015 09:34 PM, Terry Reedy wrote: On 7/16/2015 3:45 AM, Antoon Pardon wrote: On 07/15/2015 11:19 PM, Terry Reedy wrote: I believe that this pattern should work with any set of mutually recursive functions that always call each other in cyclic order. A more elaborate version does not have this limitation. Nice of you to illustrate the warping involved. ;-) Glad you appreciate it. To me, the warping is no more than, and perhaps less than, and certainly less obnoxious than,the warping required when using Baruchel's tco module. (Opinions can vary, of course.) The result will definitely run faster than with B's tco. I don't care about the speed that much. Clarity of code is more important. And I agree how Baruchel's tco module needs to be used, doesn't seem very helpful in that respect. I wouldn't call it obnoxious, cause I can appreciate the mathematical elegance behind it, but my impression is that understanding what is going on, requires a back ground knowledge that is generally not expected. So using this would probably be good for job security but wouldn't be fair to my colleagues. -- Antoon Pardon -- https://mail.python.org/mailman/listinfo/python-list
[issue21750] mock_open data is visible only once for the life of the class
Robert Collins added the comment: There are already explicit tests for that, do you want another one? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21750 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: Proposed keyword to transfer control to another function
On 07/17/2015 01:46 AM, Chris Angelico wrote: Open for bikeshedding: What should the keyword be? We can't use exec, which would match Unix and shell usage, because it's already used in a rather different sense in Python. Current candidates: transfer, goto, recurse, and anything else you suggest. I propose the combination return from. I think it is similar enough with yield from to justify this and it also won't need an extra keyword, so no programs will be broken because they used transfer, goto or whatever other new keyword as an identifier. Should there be someone who is willing to spend time on this, I wish him all luck and strength he can find. I think it would be best if it was done by someone who is interrested in using this in his own programs. Because it is all very fine talking about the pro and cons here and I certainly would use it, the question is, how wide spread would the use become and is it worth the time and effort to introduce it. If future use turns out to be disappointing such a coder can at least think of it as something that was useful for himself. -- Antoon. -- https://mail.python.org/mailman/listinfo/python-list
[issue24646] Python accepts SSL certificate that should be rejected on OSX
Ronald Oussoren added the comment: The fork of OpenSSL that Apple ships also looks at the CA list in the Keychain. IIRC that cannot be disabled. BTW. Annoyingly this fork uses a private API to access the keychain, which means we couldn't optionally use this behavior when not using Apple's binaries. -- On the road, hence brief. Op 17 jul. 2015 om 17:55 heeft Antoine Pitrou rep...@bugs.python.org het volgende geschreven: Antoine Pitrou added the comment: Do we know exactly why OS X's OpenSSL accepts it? -- nosy: +ned.deily, pitrou, ronaldoussoren ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24646 ___ -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24646 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24621] zipfile.BadZipFile: File is not a zip file
Alexei Romanov added the comment: 7z archiver could extract this ZIP archive without any problems: ~/tmp $ 7z x not_working.zip 7-Zip [64] 9.20 Copyright (c) 1999-2010 Igor Pavlov 2010-11-18 p7zip Version 9.20 (locale=en_US.utf8,Utf16=on,HugeFiles=on,4 CPUs) Processing archive: not_working.zip Extracting CoordinateData.AmplitudesDataType Extracting CoordinateData.Amplitudes Extracting CoordinateData.VolumesDataType Extracting CoordinateData.Volumes Everything is Ok Files: 4 Size: 103746 Compressed: 176384 -- nosy: +alexei.romanov ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24621 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24646] Python accepts SSL certificate that should be rejected on OSX
Antoine Pitrou added the comment: Do we know exactly why OS X's OpenSSL accepts it? -- nosy: +ned.deily, pitrou, ronaldoussoren ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24646 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: How does a dictionary work exactly?
On Fri, Jul 17, 2015 at 9:32 AM, Ned Batchelder n...@nedbatchelder.com wrote: Maybe people are reading a different implementation than I am. Python's dict object doesn't use linked lists to deal with hash collisions, it probes other slots instead. No, I was working a) from memory, and b) not looking at the implementation, which I last did a long, long time ago... Skip -- https://mail.python.org/mailman/listinfo/python-list
Re: Proposed keyword to transfer control to another function
On Fri, Jul 17, 2015 at 5:17 PM, Antoon Pardon antoon.par...@rece.vub.ac.be wrote: On 07/17/2015 01:46 AM, Chris Angelico wrote: Open for bikeshedding: What should the keyword be? We can't use exec, which would match Unix and shell usage, because it's already used in a rather different sense in Python. Current candidates: transfer, goto, recurse, and anything else you suggest. I propose the combination return from. I think it is similar enough with yield from to justify this and it also won't need an extra keyword, so no programs will be broken because they used transfer, goto or whatever other new keyword as an identifier. Oooh I like this. The parallel makes sense, and as you say, no new keyword. Yes, return from is my new preferred command! ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Possibly Pythonic Tail Call Optimization (TCO/TRE)
On Fri, Jul 17, 2015 at 8:48 PM, Antoon Pardon antoon.par...@rece.vub.ac.be wrote: Just wondering, are traceback records of generators available? They are if an exception is raised in the generator itself, but what if an exception is raised in the loop that is driven by a generator. They don't appear in the standard stack trace. Not sure what you mean here. Something like this? def gen(): yield stuff yield more stuff for stuff in gen(): bomb with exception The error didn't happen in the generator, so I wouldn't expect to see it in the traceback. There's still room for the cause of an error to not be in the traceback; imagine, for instance, a function that populates a concrete list, and then you iterate over the list. If that function sticks a None into the list and the subsequent processing is expecting all strings, that's going to bomb, but then you have to figure out where the None came from. If the traceback could include that, it'd be great, but some things aren't possible. Doesn't mean we're happy to sacrifice other functionality. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Noob in Python. Problem with fairly simple test case
- Original Message - From: Steven D'Aprano st...@pearwood.info 75% or 90% is not a vast majority. Vast majority implies more than 99%. You could not be more wrong. More than 99% is a stupendous majority, while within 95 to 99% is a tremendous majority. From the official Majority rating 2015 edition, a vast majority would be between 87 and 87.6%. Of course this is only valid in the northern hemisphere (my apologies for stating the obvious). JM -- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium. Thank you. -- https://mail.python.org/mailman/listinfo/python-list
[issue24653] Mock.assert_has_calls([]) incorrectly passes
Robert Collins added the comment: This might go back further, haven't checked 3.3, but IIRC we're only doing fixes on 3.4 up anyhow. -- nosy: +berker.peksag, kushal.das, michael.foord versions: +Python 3.4, Python 3.5, Python 3.6 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24653 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24653] Mock.assert_has_calls([]) incorrectly passes
New submission from Robert Collins:
From https://github.com/testing-cabal/mock/issues/243
from unittest import mock
mmock = mock.MagicMock()
mmock.foobar(baz)
mmock.assert_has_calls([]) # No exception raised.
Why?mmock.assert_has_calls(['x']) # Exception raised as expected.
---
Traceback (most recent call last):
File tt.py, line 7, in module
mmock.assert_has_calls(['x']) # Exception raised as expected.
File /home/robertc/work/cpython/Lib/unittest/mock.py, line 824, in
assert_has_calls
) from cause
AssertionError: Calls not found.
Expected: ['x']
Actual: [call.foobar('baz')]
--
messages: 246849
nosy: rbcollins
priority: normal
severity: normal
status: open
title: Mock.assert_has_calls([]) incorrectly passes
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Re: Possibly Pythonic Tail Call Optimization (TCO/TRE)
On 07/16/2015 06:43 PM, Chris Angelico wrote: On Fri, Jul 17, 2015 at 12:32 AM, Antoon Pardon antoon.par...@rece.vub.ac.be wrote: What is unclear about as it is generally produced on stderr? That you can do a whole lot of stuff, doesn't mean that this whole lot of stuff is part of what generally happens. When people on this list ask a person to include the stacktrace with the description of the problem, they don't mean something that includes the values of the variables. True. That said, though, it's not a justification for dropping stack frames; even in the form that's printed to stderr, there is immense value in them. It may be possible to explicitly drop frames that a programmer believes won't be useful, but a general and automated dropping of tail-call information will do more harm than good. The fact that some frameworks can show _even more_ helpful information out of a traceback only makes this stronger. Just wondering, are traceback records of generators available? They are if an exception is raised in the generator itself, but what if an exception is raised in the loop that is driven by a generator. They don't appear in the standard stack trace. It seems a bit strange that with the immense value that is given to stack frames, that these wouldn't be available somehow. -- Antoon Pardon -- https://mail.python.org/mailman/listinfo/python-list
[issue24642] Will there be an MSI installer?
Alex Walters added the comment: Having now worked with the new installer, there is nothing wrong with it, and provides sufficient scritpability, if that is a word. I only have two (and a half) thoughts on it: 1. This should be more prominently documented. The addition of the new web installer is listed in What's New, but not that the change to the new installer, and lack of the old msi installer. This is noteworthy for anyone who does scripted installs of python. 2. passing /? should list the available kay-value arguments. 2.5. The help should really be to stdout... If you are running /? on an installer executable, you are in the command prompt - no one creates a shortcut to an installer exe then modifies that shortcut to add the /? argument. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24642 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
eGenix at the EuroPython Conference 2015
eGenix.com at the EuroPython Conference 2015 July 20-26 2015 Bilbao, Spain Meet up with eGenix at this year's EuroPython Conference in Bilbao. We have free project, consulting and coaching capacities. The EuroPython Conference (https://ep2015.europython.eu/) is the one of the premier conferences for Python users and developers in Europe. It is the second largest gathering of Python enthusiast around the world. This year it is being held from July 20-26 in Bilbao, Spain. This announcement is also available on our web-site for online reading: http://www.egenix.com/company/news/EuroPython-Conference-2015.html Meet up with eGenix at EuroPython eGenix was one of the founding members of the EuroPython conference team and played a major role in organizing the first EuroPython conference in the year 2002. Since then we have attended every EuroPython conference to meet up face-to-face with the many people we know from the Python community and the many people that we don't yet know from the community -- if you are interested in meeting with us, please drop us a note so that we can arrange a meeting at i...@egenix.com. eGenix Talks at EuroPython At this year's EuroPython, Marc-André Lemburg, CEO of eGenix, will be giving a talk providing some guidance for programmers new to Python: Python idioms to help you write good code - *Avoid gotchas, write faster, more readable and maintainable code* Python focuses a lot on writing readable code and also tries to make solutions obvious, but this doesn’t necessarily mean that you cannot write unreadable code or design your code in ways which makes it hard to extend or maintain. This talk will show some useful idioms to apply when writing Python code, how to structure your modules and also goes into details on which techniques to use and which to think about twice, based on 20 years of experience writing Python. Tuesday 21 July at 15:15 CEST, Google Room https://ep2015.europython.eu/conference/talks/python-idioms-to-help-you-write-good-code Free project, consulting and coaching capacities eGenix currently has free custom Python project, consulting and coaching capacities. If you are interested in having eGenix implement your great ideas in Python, or want to have your teams benefit from our long Python coding experience, please contact us at i...@egenix.com. If you happen to attend EuroPython, you can also talk to our CEO Marc-André Lemburg directly. Please email him to arrange a meeting: m...@egenix.com. Enjoy, -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Jul 17 2015) Python Projects, Coaching and Consulting ... http://www.egenix.com/ mxODBC Plone/Zope Database Adapter ... http://zope.egenix.com/ mxODBC, mxDateTime, mxTextTools ...http://python.egenix.com/ 2015-07-20: EuroPython 2015, Bilbao, Spain ... 3 days to go 2015-07-29: Python Meeting Duesseldorf ... 12 days to go : Try our mxODBC.Connect Python Database Interface for free ! :: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/ -- https://mail.python.org/mailman/listinfo/python-list
Re: Proposed keyword to transfer control to another function
On 7/17/2015 3:17 AM, Antoon Pardon wrote: On 07/17/2015 01:46 AM, Chris Angelico wrote: Open for bikeshedding: What should the keyword be? We can't use exec, which would match Unix and shell usage, because it's already used in a rather different sense in Python. Current candidates: transfer, goto, recurse, and anything else you suggest. I propose the combination return from. Much better. I believe 'yield from' actually cuts out the middle frame containing yield from. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: Noob in Python. Problem with fairly simple test case
On Fri, Jul 17, 2015 at 4:47 PM, Steven D'Aprano st...@pearwood.info wrote: Jessie's default should be 2.7, at least. Wheezy shipped 2.7, too; it's only Squeeze (now out of support) that didn't ship any 2.7.x Python. Are you sure you can't at least upgrade to 2.7? I'm not sure, I'm not actively involved in that specific project. All I know is that the guys are always complaining about Jessie, and that they're using 2.6. Huh. Then maybe it's the other way: Jessie no longer ships or supports 2.6, so if 2.7 breaks the code, then so will Jessie. But I'm looking over the 2.7 What's New page, and it honestly doesn't jump out at me screaming Your code will break!. Strange. Anyway, the specifics don't matter. What matters is that there *are* people who are using the system-provided Python, and that (so far) that's Py2 for the majority of Linux distros. But that's definitely changing; Ubuntu and Debian are both aiming toward a state of ship Python 3 by default, but if you want 2.7, you'll have to download it, which implies that all system scripts will be ported to 3.x. Once that happens, I expect that all Debian-derived distros will follow pretty quickly (it's easy to transition if someone else has already done the vast majority of the work, by which I clearly mean about 87.4%), and non-Debian distros can probably take advantage of the prior work too, to some extent. That'll shift the balance on Linux from mostly Py2 to mostly Py3, and that'll have knock-on effects on Windows and Mac OS too, as third-party script developers will find it advisable [1] to write their code to match the predominantly available version. My guess is, the rate of Python 3 adoption is going to hit the tipping point in 2 or 3 years, after which time it will be *very* rapid. Yep, I'd agree with that estimate. Debian Stretch (9) may or may not switch; I'd be very surprised if Debian Buster (10) didn't have Py3 by default. ChrisA [1] The question is, what did the archbishop find? -- https://mail.python.org/mailman/listinfo/python-list
[issue24621] zipfile.BadZipFile: File is not a zip file
Yasar L. Ahmed added the comment: @Serhiy These files are inside another Zip-bundle exported from a commercial control software for chromatography (UNICORN 6+ by GE Healthcare). Some of the other Zip-Files in the bundle work fine but some (like this one) don't. I'm writing a script to extract/decode the deta so I'd be happy to get them extracted via python in some way (without requiring external dependencies). Would it help to remove the offending bytes and then feed the bytes-object to ZipFile? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24621 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: Need assistance
Hi, Rob,
On Fri, Jul 17, 2015 at 12:40 PM, Rob Gaddi
rgaddi@technologyhighland.invalid wrote:
On Thu, 16 Jul 2015 19:15:38 -0700, craig.sirna wrote:
I need help writing a homework program.
I'll write it, but I can't figure out how to incorporate what I have
read in the book to work in code.
The assignment wants us to take a users first, middle and last name in a
single input ( name=('enter your full name: )).
Then we must display the full name rearranged in Last, First Middle
order.
I tried to use the search function in Python to locate any spaces in the
input. It spot back the index 5 (I used Craig Daniel Sirna)
That is correct for the first space, but I can't figure out how to get
it to continue to the next space.
The indexing process is also a bit confusingto me.
I get that I can use len(fullName) to set the length of the index, and
how the index is counted, but after that I'm lost.
I have emailed my professor a few times, but haven't gotten a
response.(online course)
Any help would be greatly appreciated.
1) Use the interactive console. Set x = 'Craig Daniel Sirna' and play
with indexing and slicing it until you really internalize what they
mean. x[3], x[-3], x[0:10], x[0:-1]. It's not actually relevant to the
problem at hand, but right now is the time in your education to get
indexing down cold; skimp on it now and you'll pay for it forever.
Should take you about 5 minutes.
2) https://docs.python.org/3/library/stdtypes.html#string-methods
You can do what you're trying to do, but you're swinging a hammer with a
powered nailgun at your feet. Search is an inefficient way to try to
split a string into parts based on a delimiter.
Most likely it's not him. They will learn it later during the course. ;-)
--
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Email address domain is currently out of order. See above to fix.
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Re: how do you play python because i have gone on the website but i haven't managed to code?
On Thursday, July 16, 2015 at 12:31:04 PM UTC-7, Aron Barsam wrote: how do you play python because i have gone on the website but i haven't managed to code? http://i.imgur.com/x2KwTbw.jpg -- https://mail.python.org/mailman/listinfo/python-list
Re: Proposed keyword to transfer control to another function
On Friday, July 17, 2015 at 12:17:55 AM UTC-7, Antoon Pardon wrote: On 07/17/2015 01:46 AM, Chris Angelico wrote: Open for bikeshedding: What should the keyword be? We can't use exec, which would match Unix and shell usage, because it's already used in a rather different sense in Python. Current candidates: transfer, goto, recurse, and anything else you suggest. I propose the combination return from. I think it is similar enough with yield from to justify this and it also won't need an extra keyword, so no programs will be broken because they used transfer, goto or whatever other new keyword as an identifier. Should there be someone who is willing to spend time on this, I wish him all luck and strength he can find. I think it would be best if it was done by someone who is interrested in using this in his own programs. Because it is all very fine talking about the pro and cons here and I certainly would use it, the question is, how wide spread would the use become and is it worth the time and effort to introduce it. If future use turns out to be disappointing such a coder can at least think of it as something that was useful for himself. -- Antoon. return from or yield from looks too much like a COMEFROM instruction/statement. https://en.wikipedia.org/wiki/COMEFROM -- https://mail.python.org/mailman/listinfo/python-list
Re: Need assistance
On Thu, 16 Jul 2015 19:15:38 -0700, craig.sirna wrote:
I need help writing a homework program.
I'll write it, but I can't figure out how to incorporate what I have
read in the book to work in code.
The assignment wants us to take a users first, middle and last name in a
single input ( name=('enter your full name: )).
Then we must display the full name rearranged in Last, First Middle
order.
I tried to use the search function in Python to locate any spaces in the
input. It spot back the index 5 (I used Craig Daniel Sirna)
That is correct for the first space, but I can't figure out how to get
it to continue to the next space.
The indexing process is also a bit confusingto me.
I get that I can use len(fullName) to set the length of the index, and
how the index is counted, but after that I'm lost.
I have emailed my professor a few times, but haven't gotten a
response.(online course)
Any help would be greatly appreciated.
1) Use the interactive console. Set x = 'Craig Daniel Sirna' and play
with indexing and slicing it until you really internalize what they
mean. x[3], x[-3], x[0:10], x[0:-1]. It's not actually relevant to the
problem at hand, but right now is the time in your education to get
indexing down cold; skimp on it now and you'll pay for it forever.
Should take you about 5 minutes.
2) https://docs.python.org/3/library/stdtypes.html#string-methods
You can do what you're trying to do, but you're swinging a hammer with a
powered nailgun at your feet. Search is an inefficient way to try to
split a string into parts based on a delimiter.
--
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Email address domain is currently out of order. See above to fix.
--
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Re: Proposed keyword to transfer control to another function
On 07/17/2015 12:17 AM, Antoon Pardon wrote: On 07/17/2015 01:46 AM, Chris Angelico wrote: Open for bikeshedding: What should the keyword be? We can't use exec, which would match Unix and shell usage, because it's already used in a rather different sense in Python. Current candidates: transfer, goto, recurse, and anything else you suggest. I propose the combination return from. +1 -- ~Ethan~ -- https://mail.python.org/mailman/listinfo/python-list
tkinter resize question
Resizing a tkinter window which contains a frame which contains a button widget, will not change the current size of the window, frame or button as recorded in their height and width attributes (at least not if they are resizable). What is the correct way to detect their current size? -- https://mail.python.org/mailman/listinfo/python-list
Re: Need assistance
On 17/07/2015 17:40, Rob Gaddi wrote:
On Thu, 16 Jul 2015 19:15:38 -0700, craig.sirna wrote:
I need help writing a homework program.
I'll write it, but I can't figure out how to incorporate what I have
read in the book to work in code.
The assignment wants us to take a users first, middle and last name in a
single input ( name=('enter your full name: )).
Then we must display the full name rearranged in Last, First Middle
order.
I tried to use the search function in Python to locate any spaces in the
input. It spot back the index 5 (I used Craig Daniel Sirna)
That is correct for the first space, but I can't figure out how to get
it to continue to the next space.
The indexing process is also a bit confusingto me.
I get that I can use len(fullName) to set the length of the index, and
how the index is counted, but after that I'm lost.
I have emailed my professor a few times, but haven't gotten a
response.(online course)
Any help would be greatly appreciated.
1) Use the interactive console. Set x = 'Craig Daniel Sirna' and play
with indexing and slicing it until you really internalize what they
mean. x[3], x[-3], x[0:10], x[0:-1]. It's not actually relevant to the
problem at hand, but right now is the time in your education to get
indexing down cold; skimp on it now and you'll pay for it forever.
Should take you about 5 minutes.
I'll throw in something to emphasize a major difference between indexing
and slicing.
x = 'Craig Daniel Sirna'
x[100]
Traceback (most recent call last):
File stdin, line 1, in module
IndexError: string index out of range
x[100:]
''
x[:100]
'Craig Daniel Sirna'
2) https://docs.python.org/3/library/stdtypes.html#string-methods
You can do what you're trying to do, but you're swinging a hammer with a
powered nailgun at your feet. Search is an inefficient way to try to
split a string into parts based on a delimiter.
Inefficient I don't know about, and mostly don't care about either, but
certainly not the cleanest way to code, at least IMHO.
--
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.
Mark Lawrence
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[issue24641] Log type of unserializable value when raising JSON TypeError
Serhiy Storchaka added the comment: I think it would be better to change error message to mention the type only. Yet one argument is that the repr of affected object can be very large, while the type name usually is short enough. repr() even can raise an exception (e.g. MemoryError). -- nosy: +bob.ippolito, pitrou, serhiy.storchaka ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24641 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: tkinter resize question
On Friday, July 17, 2015 at 1:53:19 PM UTC-5, nickge...@gmail.com wrote: Resizing a tkinter window which contains a frame which contains a button widget, will not change the current size of the window, frame or button as recorded in their height and width attributes (at least not if they are resizable). What is the correct way to detect their current size? Ok, partially answering my own question: The geometry of the window will change (win.geometry()), but the changes do not appear to propagate to the retrieved width/height of the child widgets, frames, etc. Or am I incorrect with this? -- https://mail.python.org/mailman/listinfo/python-list
[issue24649] python -mtrace --help is wrong
Changes by Terry J. Reedy tjre...@udel.edu: -- nosy: +belopolsky ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24649 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: Need Help w. Getting the Eclipse Python Add-On.
On 7/17/2015 11:22 AM, Steve Burrus wrote: I Need immediate Help w. Getting the Eclipse Python Add-On. I looked all around the Eclipse website to try to get this but didn't see the add-on for this. Can someone please help me to find it? Thanx. Googling 'python ecplise' certainly yields a lot of apparently valid links -- you might have better luck starting with a tutorial -- see perhaps http://www.vogella.com/tutorials/Python/article.html gets you further down the road. Emile -- https://mail.python.org/mailman/listinfo/python-list
Re: Noob in Python. Problem with fairly simple test case
On Friday, July 17, 2015 at 1:38:52 AM UTC-5, Steven D'Aprano wrote: 75% or 90% is not a vast majority. Vast majority implies more than 99%. But regardless of the precise meaning of vast, if you want to dismiss one in four people (25%) or one in ten (10%) as inconsequential, then you've got some serious issues. My estimate was *CONSERVATIVE* Steven. Read my words: EDUCATED GUESS. Unlike you, I'm not going to falsify the numbers just to win an argument. I feel very strongly about the 75%, even though i know the percentage is much higher. You can't risk the upgrade? What precisely are you afraid of? Simple. I don't want to waste even a second of time debugging old code that has been bug free for years. I would rather spend that time writing new code. Productivity is important to some of us Steven! And don't drag out that old cliche about how running 2to3 is the path to lands of milk and honey. I call BS! With the nonrestrictive typing of Python a bug can be hidden from even the best testing methodology. Why would i risk exception hell just to please you? I don't make my decisions based on your, or the BDFL's, opinions of what is best for me. Heck, i don't make my decisions based on what might be good for the Python community. MY CODE! My RULES! GOT IT? That's nonsense. Spinning tires implies no forward motion. Python 3 usage is *certainly* moving forward: we've gone from the situation in 2008 of nobody using it, to the current situation where there's lots of activity around it: How much of that is purely hype? Remember the explosion of Python usage *BEFORE* Python3? However, there has been a steady decline of Python usage since. students learning on Python 3, You act as if *EVERY* student that ever uses Python will continue using Python forever, and *ONLY* Python! When in fact, Python is mostly a stepping stone for CS-101 students on their path to real languages like C, Java, DHTML, and the APIs of the various mobile platforms. *THIS* is where code is written to solve real life problems. *THIS* is where code directly interacts with the *VAST MAJORITY* (yeah i said it!) of humans on this planet to get stuff done! But where's Python? Oh, i know, it's stuck on my desktop. @_@ PYTHON IS A ONE TRICK PONY! My guess is, the rate of Python 3 adoption is going to hit the tipping point in 2 or 3 years, after which time it will be *very* rapid. THE INTERNET WILL REMEMBER YOUR PREDICTION! A lot can happen in 2-3 years that may render Python obsolete (and your blabbing about 2020, really?). My prediction is that Python will never recover from this backward compatibility issue. And sadly, Python2 had been gaining stong momentum before Python3 arrived. The code break was the first blow, and the evolving technologies will be the final blow. Desktops computers are becoming obsolete, and mobile platforms are the future. This train has long since departed the station. -- https://mail.python.org/mailman/listinfo/python-list
[issue24641] Log type of unserializable value when raising JSON TypeError
Terry J. Reedy added the comment:
A typical TypeError message use the following pattern:
TypeError: 'int' object is not callable
as it is the class, not the value, that is the problem.
If the same is always true for the JSON TypeError, at the point of failure,
then the dumps message could follow the same pattern.
However, I don't know if the message *is* value independent. The SO question
asked about
TypeError: {'album': [uRooney's Lost Album], 'title': [u'The Kids
After Sunset'], 'artist': [u'Rooney']} is not JSON serializable
and the OP claimed in a comment to the accepted answer that the problem was
that the value objects represented as lists were not list() objects, just as
'5' here is not an int() object.
The JSON error code, in 3.5 at
File C:\Programs\Python35\lib\json\encoder.py, line 180, in default
raise TypeError(repr(o) + is not JSON serializable)
could be expanded to check whether the string representation starts with the
class name and if it does not, add 'classname' object at the front. This
would solve Madison's posted issue, but not the SO problem.
(It would, however, have made it clear that the {}s represented a real dict()
object and directed attention inward.)
For testing, compile('','','exec') returns an object that cannot be dumped.
To me, this looks more like an enhancement than bugfix, so a change might be
limited to future releases.
--
nosy: +ezio.melotti, rhettinger, terry.reedy
stage: - test needed
type: - enhancement
versions: +Python 3.5, Python 3.6
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[issue24654] PEP 492 - example benchmark doesn't work (TypeError)
Terry J. Reedy added the comment: timeit(binary, 5, 3) timeit(abinary, 5, 3) gives me the same error running on Win 7 from Idle -- nosy: +terry.reedy stage: - needs patch type: enhancement - behavior ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24654 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Need Help w. Getting the Eclipse Python Add-On.
I Need immediate Help w. Getting the Eclipse Python Add-On. I looked all around the Eclipse website to try to get this but didn't see the add-on for this. Can someone please help me to find it? Thanx. -- https://mail.python.org/mailman/listinfo/python-list
[issue24621] zipfile.BadZipFile: File is not a zip file
Serhiy Storchaka added the comment:
Would it help to remove the offending bytes and then feed the bytes-object to
ZipFile?
Yes, it will.
import zipfile, struct, io
with open('not_working.zip', 'rb') as f:
data = f.read()
i = data.rindex(b'PK\5\6') + 22
i += struct.unpack('H', data[i-2: i])[0]
if data[i:].strip(b'\0') == b'':
data = data[:i]
zf = zipfile.ZipFile(io.BytesIO(data))
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Re: Need Help w. Getting the Eclipse Python Add-On.
On Fri, Jul 17, 2015 at 2:22 PM, Steve Burrus steveburru...@gmail.com wrote: I Need immediate Help w. Getting the Eclipse Python Add-On. I looked all around the Eclipse website to try to get this but didn't see the add-on for this. Can someone please help me to find it? Thanx. I think you're looking for PyDev: http://www.pydev.org/ -- Jerry -- https://mail.python.org/mailman/listinfo/python-list
[issue24654] PEP 492 - example benchmark doesn't work (TypeError)
Changes by Ezio Melotti ezio.melo...@gmail.com: -- nosy: +ezio.melotti ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24654 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21750] mock_open data is visible only once for the life of the class
Robert Collins added the comment: The fix for this uncovered more testing / scenarios that folk use mock_open for that were not accounted for. I'm reverting it from mock, and am going to roll-forward for Python: I should have a fix in a day or two and we can fix it more completely then. https://github.com/testing-cabal/mock/issues/288 -- stage: commit review - needs patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21750 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: A new module for performing tail-call elimination
On 7/16/2015 3:45 PM, Marko Rauhamaa wrote: Nobody seemed to notice that I just posted a fairly typical tail call function: Because non-recursive tail calls are completely normal. Example: return len(self.children) Even tail operations like return a + b are tail calls if rewritten as return a.__add__(b) (usually but not always equivalent) or rewritten as return operator.add(a, b) (always equivalent) or compiled by an implementation as an equivalent internal function call. It happens to be that CPython implements calls to symbol operator functions by putting the bodies of such functions into a C switch inside a while loop. It this compiles operator symbols into bytecodes that cause a jump to the corresponding code. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
[issue24642] Will there be an MSI installer?
Steve Dower added the comment: 1. This should be more prominently documented. Very true. I'll get a link to the updated docs page in there. 2. passing /? should list the available kay-value arguments. Should be doable. I've mostly been holding off until I stop changing the arguments. At the very least, I can add a link to the doc page from here as well. 2.5. The help should really be to stdout... Unfortunately, I don't think this one is possible as the installer is SUBSYSTEM:WINDOWS not CONSOLE. stdout is unbound by default, and the only way to bind it is to open a new console window, which doesn't really help here. Switching to SUBSYSTEM:CONSOLE is going to open a new console window every time you run it (and running by double-clicking or from a browser will be the vast majority). I can probably add a link from the front page of the installer to bring up the help page, but I wouldn't want it to be too obtrusive (maybe from the Customize Options page?) - the aim is to reduce the number of decisions for most users by having a very clean front page. There was a suggestion a while ago to generate a full command line based on the options selected in the UI, which is doable, but maybe not useful enough to justify the time and effort. I'd expect anyone capable of this sort of deployment to be able to figure out the command line for themselves though, given access to the list of possible options. -- assignee: - docs@python components: +Documentation nosy: +docs@python ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24642 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: tkinter resize question
On 7/17/2015 2:53 PM, nickgeova...@gmail.com wrote: Resizing a tkinter window which contains a frame which contains a button widget, will not change the current size of the window, frame or button as recorded in their height and width attributes (at least not if they are resizable). Post the code and experiments performed that leads you to believe the above. What is the correct way to detect their current size? It is hard to fix code not posted. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
[issue24658] open().write() fails on 4 GB+ data (OS X)
New submission from Eric O. LEBIGOT:
On OS X, the Homebrew and MacPorts versions of Python 3.4.3 raise an exception
when writing a 4 GB bytearray:
open('/dev/null', 'wb').write(bytearray(2**31-1))
2147483647
open('/dev/null', 'wb').write(bytearray(2**31))
Traceback (most recent call last):
File stdin, line 1, in module
OSError: [Errno 22] Invalid argument
This has an impact on pickle, in particular
(http://stackoverflow.com/questions/31468117/python-3-can-pickle-handle-byte-objects-larger-than-4gb).
--
components: Interpreter Core
messages: 246878
nosy: lebigot
priority: normal
severity: normal
status: open
title: open().write() fails on 4 GB+ data (OS X)
type: behavior
versions: Python 3.4, Python 3.5
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Re: Proposed keyword to transfer control to another function
Chris Angelico ros...@gmail.com writes: # derived from Paul Rubin's example def quicksort(array, start, end): midp = partition(array, start, end) Heh, forgot to include the base case, as someone pointed out. Oh well, it's pseudocode, or something. transfer quicksort(array, midp+1, end) Overall I like the idea but though it doesn't seem terribly important in the scheme of things. I think the syntax has converged to return from which seems good to me. Note that this is incompatible with 'try' and 'with' blocks, and is Maybe something can be done about that. Is there anything that I've missed out in speccing this up? I've a suspicion that this might turn out to be as complicated as 'yield from' in all its handling of edge cases. Seems worthy of more thought. -- https://mail.python.org/mailman/listinfo/python-list
Re: A new module for performing tail-call elimination
Chris Angelico ros...@gmail.com writes: My point was that I have yet to see anything that demands TCO and can't be algorithmically improved. I don't think anyone claimed you can't simulate TCO with updateable variables and a while loop. TCO just sometimes lets you write some things in a cleaner (in proponnets' view) style. The best so far has been a quicksort that uses TCO to guarantee a maximum on stack usage. I actually thought the state machine example was more convincing. Doing that without TCO would have required some kind of explicit control loop and a messy dispatch mechanism instead of direct chaining from one state to the next. -- https://mail.python.org/mailman/listinfo/python-list
[issue24655] _ssl.c: Missing do for do {} while(0) idiom
Brian Cain added the comment: Whoops, that's not right. Corrected. -- Added file: http://bugs.python.org/file39942/ssl_convert_3rd.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24655 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24655] _ssl.c: Missing do for do {} while(0) idiom
Brian Cain added the comment: New patch. -- Added file: http://bugs.python.org/file39941/ssl_convert_2nd.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24655 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24563] Encoding declaration: doc supported encodings
Martin Panter added the comment: You can remove the “.. XXX” line; I understand it is just like a TODO comment, and with this fixed it would no longer be relevant. I suggest putting the links next to the sentence that ends “. . . the encoding name must be recognized by Python.” The links should be internal links, rather than hard-coded Internet links to another version of the documentation. See https://docs.python.org/devguide/documenting.html#cross-linking-markup. The Standard Encodings section already has a label already set up for you to use :) -- nosy: +vadmium stage: needs patch - patch review ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24563 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24646] Python accepts SSL certificate that should be rejected on OSX
Ned Deily added the comment: And the tradeoff for supplying private copies of newer OpenSSL libs with the Pythons installed by python.org OS X installers is that we would then need to solve the CA management problem for all users of those Pythons. So far there hasn't been a good solution to that problem so we have elected to continue to use the least unattractive solution of continuing to use the Apple-supplied libs with the 10.6+ installer variants (Issue17128). Eventually, we will have to bite the bullet and come up with s better solution as Apple will likely eventually stop shipping OpenSSL libs altogether. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24646 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24646] Python accepts SSL certificate that should be rejected on OSX
Donald Stufft added the comment: For what it's worth, the El Capitan Beta's apparently don't ship with OpenSSL headers anymore though they do still ship with the dylibs. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24646 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24563] Encoding declaration: doc supported encodings
Martin Panter added the comment: PEP 263 doesn’t say exactly what encodings are supported. It mentions Shift JIS is supported, but UTF-16 is not. Only UTF-8 is allowed if the file starts with a UTF-8 BOM. I guess many of the Python-specific text encodings from the second section may be supported. Probably any text encoding in general, as long as the first one or two lines can “rougly” be parsed in ASCII. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24563 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24536] os.pipe() should return a structsequence (or namedtuple.)
Martin Panter added the comment: The original Python-ideas thread: https://www.marc.info/?t=14355895454 If you want shorter field names, how about just r and w (as they are currently documented)? os.write(our_pipe.w, bdata) os.read(our_pipe.r, 1024) “Input” and “output” would also work for me (though I am also happy with read, read_fd, etc). However it does seem a bit novel; in my experience people tend to say pipes have read and write ends, not inputs and outputs. os.write(our_pipe.input, bdata) os.read(our_pipe.output, 1024) -- nosy: +vadmium type: - enhancement ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24536 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24642] Will there be an MSI installer?
Alex Walters added the comment: on 2.5, I figured the answer would be along those lines. for 2, Linking to the documentation at least would be helpful (or otherwise indicating that there are arguments that are not listed and are in the docs) if the arguments cant be listed reasonably easily. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24642 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24657] CGIHTTPServer module discard continuous '/' letters from params given by GET method.
New submission from takayuki: I executed CGIHTTPServer and requested the following URI, http://localhost:8000/cgi-bin/test.py?k=aa%2F%2Fbb; to pass aa//bb as argument k, but test.py received aa/bb. I looked in CGIHTTPServer.py and found _url_collapse_path function discards continuous slash letters even they are in the given parameters. -- components: Library (Lib) messages: 246877 nosy: takayuki priority: normal severity: normal status: open title: CGIHTTPServer module discard continuous '/' letters from params given by GET method. versions: Python 2.7 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24657 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24658] open().write() fails on 2 GB+ data (OS X)
Eric O. LEBIGOT added the comment: PS: I should have written 2 GB bytearray (so this looks like a signed 32 bit integer issue). -- title: open().write() fails on 4 GB+ data (OS X) - open().write() fails on 2 GB+ data (OS X) ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24658 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: Proposed keyword to transfer control to another function
On 17.07.15 02:46, Chris Angelico wrote: Out of the lengthy thread on tail call optimization has come one broad theory that might be of interest, so I'm spinning it off into its own thread. The concept is like the Unix exec[vlpe] family of functions: replace the current stack frame with a new one. This can be used for explicit tail recursion without repeated stack frames, or for a pre-check that then disappears out of the stack. Like any other feature, it can be misused to make debugging difficult, but among consenting adults, hopefully it can be used sensibly. I think there is no chance that this proposition will be accepted by Guido, because it makes debugging harder. -- https://mail.python.org/mailman/listinfo/python-list
[issue5945] PyMapping_Check returns 1 for lists
Changes by Christian Barcenas christ...@cbarcenas.com: -- versions: +Python 3.6 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue5945 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: tkinter resize question
On 7/17/2015 9:31 PM, nickgeova...@gmail.com wrote: On Friday, July 17, 2015 at 5:55:19 PM UTC-5, Terry Reedy wrote: On 7/17/2015 2:53 PM, nickgeova...@gmail.com wrote: Resizing a tkinter window which contains a frame which contains a button widget, will not change the current size of the window, frame or button as recorded in their height and width attributes (at least not if they are resizable). Post the code and experiments performed that leads you to believe the above. It's really boring but here you are: [ngeo@localhost src]$ python3 Python 3.4.2 (default, Dec 20 2014, 13:53:33) [GCC 4.8.2 20140120 (Red Hat 4.8.2-16)] on linux Type help, copyright, credits or license for more information. import tkinter win=tkinter.Tk() frame=tkinter.Frame(win, bg=blue, width=200, height=200) butt1=tkinter.Button(fg=green, bg=black) frame.grid() butt1.grid() butt1[width] 0 butt1[height] 0 win[width] 0 win[height] 0 I believe these configuration settings should be interpreted a 'initial size' (if not default) or 'desired size' or possibly min or max size, depending on the grid or pack settings. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
[issue24658] open().write() fails on 2 GB+ data (OS X)
Changes by Serhiy Storchaka storch...@gmail.com: -- components: +Extension Modules, IO -Interpreter Core nosy: +haypo, ned.deily, ronaldoussoren ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24658 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24646] Python accepts SSL certificate that should be rejected on OSX
Ned Deily added the comment: For what it's worth, the El Capitan Beta's apparently don't ship with OpenSSL headers anymore though they do still ship with the dylibs. Hmm, I had tested installing existing python.org binary releases with the first DPs of 10.11 and I *thought* I had tested building from source, as well. But, yes, it appears that the headers are no longer there, at least on the most recent DP I have installed. I'm traveling and essentially off-the-net for another week but I will take a closer look at the situation then. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24646 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: tkinter resize question
On 7/17/15 12:17 PM, nickgeova...@gmail.com wrote: On Friday, July 17, 2015 at 1:53:19 PM UTC-5, nickge...@gmail.com wrote: Resizing a tkinter window which contains a frame which contains a button widget, will not change the current size of the window, frame or button as recorded in their height and width attributes (at least not if they are resizable). What is the correct way to detect their current size? Ok, partially answering my own question: The geometry of the window will change (win.geometry()), but the changes do not appear to propagate to the retrieved width/height of the child widgets, frames, etc. Or am I incorrect with this? I'm not seeing it. If I try the following script I see that resizing the widget does update frame.winfo_width() and winfo_height. (I also see that the requested width and height are ignored; you can omit those). -- Russell #!/usr/bin/env python import Tkinter root = Tkinter.Tk() frame = Tkinter.Frame(root, width=100, height=50) frame.pack(expand=True, fill=both) def doReport(*args): print frame actualwidth=%s, height=%s % (frame.winfo_width(), frame.winfo_height()) print frame requested width=%s, height=%s % (frame.winfo_reqwidth(), frame.winfo_reqheight()) button = Tkinter.Button(frame, text=Report, command=doReport) button.pack() root.mainloop() -- https://mail.python.org/mailman/listinfo/python-list
[issue21258] Add __iter__ support for mock_open
Changes by Berker Peksag berker.pek...@gmail.com: -- nosy: +berker.peksag versions: +Python 3.6 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21258 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: tkinter resize question
On Friday, July 17, 2015 at 2:52:56 PM UTC-5, Russell Owen wrote: I'm not seeing it. If I try the following script I see that resizing the widget does update frame.winfo_width() and winfo_height. (I also see that the requested width and height are ignored; you can omit those). I wonder if the OP is trying to query the sizes from inside an event handler? Hmm. But since he failed to explain the problem coherently, and also failed to provide a code sample, i'm not willing to exert any effort beyond that. -- https://mail.python.org/mailman/listinfo/python-list
Re: Noob in Python. Problem with fairly simple test case
On 17/07/2015 21:38, Laura Creighton wrote: I think kivy is doing a very nice job of python-on-the-mobile. Have you looked? Please do not rant at me, just tell me what you think. Laura At least rr occasionally comes out with something useful, usually WRT tkinter. He's in the bottom division when compared to the RUE, who is still managing to get onto gg with his complete nonsense. I'll admit I enjoy tripping over there just to report him. -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence -- https://mail.python.org/mailman/listinfo/python-list
Python Requirements
Dear Python-List As part of my A2 Computing coursework, I need to program a solution using Python 3.4. I also need to document the minimum requirements to run Python 3.4 on a Windows machine, including minimum RAM, minimum processing power, minimum hard disk space and monitor resolution. I have searched the Python forums and website, but I was unable to find these requirements. Could you please send me a copy of these requirements for use in my coursework? Thank you for your response in advance, Luke Harrison A2 Computing Student -- https://mail.python.org/mailman/listinfo/python-list
[issue24655] _ssl.c: Missing do for do {} while(0) idiom
New submission from Brian Cain:
_ssl.c has a convert() macro which misuses the do { ... } while(0) pattern
by accidentally omitting the do.
This was discovered when building with clang, it reports while loop has empty
body. Effectively, convert puts the body into gratuitous scope braces and
happens to be followed by a while(0);. If convert() were used in some
context where it weren't followed by a semicolon, it might do something
terribly interesting. Or, more likely, just fail to build.
--
components: Extension Modules
files: ssl_convert.patch
keywords: patch
messages: 246868
nosy: Brian.Cain
priority: normal
severity: normal
status: open
title: _ssl.c: Missing do for do {} while(0) idiom
versions: Python 3.6
Added file: http://bugs.python.org/file39938/ssl_convert.patch
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Re: Proposed keyword to transfer control to another function
On 17Jul2015 20:43, Chris Angelico ros...@gmail.com wrote: On Fri, Jul 17, 2015 at 5:17 PM, Antoon Pardon antoon.par...@rece.vub.ac.be wrote: On 07/17/2015 01:46 AM, Chris Angelico wrote: Open for bikeshedding: What should the keyword be? We can't use exec, which would match Unix and shell usage, because it's already used in a rather different sense in Python. Current candidates: transfer, goto, recurse, and anything else you suggest. I propose the combination return from. I think it is similar enough with yield from to justify this and it also won't need an extra keyword, so no programs will be broken because they used transfer, goto or whatever other new keyword as an identifier. Oooh I like this. The parallel makes sense, and as you say, no new keyword. Yes, return from is my new preferred command! +1 Cheers, Cameron Simpson c...@zip.com.au A pessimist is an optimist in full possession of the facts. -- https://mail.python.org/mailman/listinfo/python-list
[issue24642] Will there be an MSI installer?
Roundup Robot added the comment: New changeset 06600287f11f by Steve Dower in branch '3.5': Issue #24642: Adds installer notes and links to What's New for 3.5 https://hg.python.org/cpython/rev/06600287f11f New changeset d6c91b8242d2 by Steve Dower in branch 'default': Issue #24642: Adds installer notes and links to What's New for 3.5 https://hg.python.org/cpython/rev/d6c91b8242d2 -- nosy: +python-dev ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24642 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue24650] Error in yield expression documentation
swanson added the comment: Okay, interesting - I hadn't checked the glossary. I don't ultimately care what it's called as long as the documentation is clear and consistent. But for anyone just looking at the names of the classes and the class hierarchy, they'd come away saying, A generator is a type of iterator, not A generator is a type of function. (Functions can't even have subtypes.) If the docs are painting a different picture than the already existing reality, it seems like that would be confusing to anyone who doesn't already know how they work. (If you already know how something works, you don't really need the docs, so it's easy to think they're clearer than they really are.) -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue24650 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: Possibly Pythonic Tail Call Optimization (TCO/TRE)
On 7/17/2015 7:43 AM, Antoon Pardon wrote: On 07/17/2015 01:05 PM, Chris Angelico wrote: def gen(): yield stuff yield more stuff for stuff in gen(): bomb with exception The error didn't happen in the generator, so I wouldn't expect to see it in the traceback. Yes something like that. And I wouldn't expect it either but if it is not present, is it because nobody thought about it or because it is a bad idea or an idea difficult to implement? There's still room for the cause of an error to not be in the traceback; imagine, for instance, a function that populates a concrete list, and then you iterate over the list. If that function sticks a None into the list and the subsequent processing is expecting all strings, that's going to bomb, but then you have to figure out where the None came from. If the traceback could include that, it'd be great, but some things aren't possible. Sure, but in this case, the generator is still active. No more than any other object sitting around inactive. Calling a generator function like gen above returns a generator with the generator function, in a suspended inactive state, attached as an attribute. When the generator.__next__ function is called, it activates its instance of the generator function, which suspends itself again after yielding something. At the point of the exception above, the generator next function has returned. There could be multiple generators with suspended generator functions sitting around. For instance: def f(): for tup in zip(gf0, gf1, gf2, gf3, gf4, gf5): a = tup[6] # whoops, IndexError unreachable code meant to do something -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Trac 1.1.6 Released
Trac 1.1.6 Released === Trac 1.1.6, the final release on the 1.1.x development line leading up to 1.2, provides more than a half-dozen minor fixes and enhancements. Note that the 1.1.x releases are stable and tested snapshots of the trunk. They can be seen as sub-milestones on the road towards Trac 1.2. As opposed to maintenance releases, *we offer no guarantees on feature and API compatibility from one 1.1.x release to the next*. However, by following 1.1.x you get a chance to use new features earlier, and therefore be able to contribute feedback when things are still in flux. It's also less risky than just getting the latest trunk, as we won't cut a 1.1.x release in the middle of a series of changes (though we had and still intend to have a good record of keeping things always working on trunk). The intended audience are therefore enthusiast Trac users and Trac plugin developers. These packages should *not* be integrated in distributions, for example. The fixes made for 1.0.7 are also included. You can find all the detailed release notes at: - http://trac.edgewall.org/wiki/TracDev/ReleaseNotes/1.1#DevelopmentReleases - http://trac.edgewall.org/wiki/TracDev/ReleaseNotes/1.0#MaintenanceReleases Download URLs: http://download.edgewall.org/trac/Trac-1.1.6.tar.gz http://download.edgewall.org/trac/Trac-1.1.6.win32.exe http://download.edgewall.org/trac/Trac-1.1.6.win-amd64.exe http://download.edgewall.org/trac/Trac-1.1.6.zip MD5 sums: 0f96a95a3e8a92e7a694883c929b2fa2 Trac-1.1.6.tar.gz 55c9dbb5ee430d139d0195eb9a056146 Trac-1.1.6.win32.exe 4d42dcbedafcfeba30a8be6d8a02ab4c Trac-1.1.6.win-amd64.exe fdf6f5e7653ae84cd2c8f14ac6475dc2 Trac-1.1.6.zip SHA1 sums: 0f4b3cc3cb8a2ee6b649ee5c4cf502f4f1f213e3 Trac-1.1.6.tar.gz d1273671ab354ea97efbc0a78bf03a0b86125399 Trac-1.1.6.win32.exe 13e5f23e940bf9eaef9cb9261e0e6b5b87da21c6 Trac-1.1.6.win-amd64.exe 99b98f716f38eda3fdacf4ab7221e0d381d41418 Trac-1.1.6.zip Enjoy! - The Trac Team http://trac.edgewall.org/ -- https://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations/
Parsing and displaying C structs in a semi-intelligent way.
In my day job, we have a large code base of mostly identical projects, each
with their own customizations. The customizations can be a real pain
sometimes. Especially when debugging binary data. The interesting part of
the binary dumps are most often the stuff that are tweaked from project to
project. The prime suspect is a structure like this:
typedef struct
{
bytenext ; /* Index to next wedge */
byteflags ; /* ricd-control flags */
wordalt [MAX_alt] ; /* Alternative wedges */
...
} ConvResult ;
typedef struct
{
bytestate ; /* UCART_ (see cart.h) */
wordheadcart ; /* Cart number for header cart */
ConvResult conv ;
...
} cartUTable_t ;
The actual structure with substructures are much larger. This structure
contains all the information used when sorting stuff[1]. For historical
reasons, the data is dumped to a binary file at the end of the items
life-cycle. We do have a debugging tool, that reads an in-house file format
specifying the members of the structure, and how to display them. However,
updating this description is error-prone, and just about as funny as waiting
for the Norwegian Blue to fly out over the fiords. So most often it's either
not done, or is unusable.
To clean up this mess, I've devised a cunning plan, involving a C-parser,
that can write a structure definition as XML. Reading this is simple enough,
and going from that to a format string for struct.unpack() is mostly
trivial. Except for the arrays of some C-type, that happens to be something
else than an array of char. Due to the normal use case[2] of dumping this
binary data, I need to get the parsed data munged into a form, that can be
put into a namedtuple as single member, even when I have an array of
(typical) six conv.alt values. I'm getting stuck with the limitations of
struct and namedtuple. While inheriting either of them to get the job done,
seem to be feasible, I still feel that I somehow should be able to do
something list comprehension-ish, to avoid going there. I just can't see
the light.
(Thank you for reading all the way to here!)
1. Luggage, parcels, shop replenishments ... In short: mostly rectangular
things that has a barcode attached.
2. Random ordering, not displaying all members, and only a part of the
arrays.
--
//Wegge
--
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Re: Need assistance
On Thu, 16 Jul 2015 19:15:38 -0700, craig.sirna wrote:
The assignment wants us to take a users first, middle and last name in a
single input ( name=('enter your full name: )).
Then we must display the full name rearranged in Last, First Middle
order.
To generate a list of words from a string, split the string up on the
spaces between words. See the split method of strings.
Having a list of words, get a copy of the list in reverse order. See the
reversed function (and maybe the list function).
Note - reversed returns an iterable, list will convert the iterable to a
list.
To join the elements of a list into a string, see the join method of
strings.
--
Denis McMahon, denismfmcma...@gmail.com
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Re: tkinter resize question
On Friday, July 17, 2015 at 5:55:19 PM UTC-5, Terry Reedy wrote: On 7/17/2015 2:53 PM, nickgeova...@gmail.com wrote: Resizing a tkinter window which contains a frame which contains a button widget, will not change the current size of the window, frame or button as recorded in their height and width attributes (at least not if they are resizable). Post the code and experiments performed that leads you to believe the above. It's really boring but here you are: [ngeo@localhost src]$ python3 Python 3.4.2 (default, Dec 20 2014, 13:53:33) [GCC 4.8.2 20140120 (Red Hat 4.8.2-16)] on linux Type help, copyright, credits or license for more information. import tkinter win=tkinter.Tk() frame=tkinter.Frame(win, bg=blue, width=200, height=200) butt1=tkinter.Button(fg=green, bg=black) frame.grid() butt1.grid() butt1[width] 0 butt1[height] 0 win[width] 0 win[height] 0 Needless to say the button has appeared and has non-zero size. What is the correct way to detect their current size? It is hard to fix code not posted. Just a question from first principles: Find a widget's current size. But the code example posted showed a working way to do the same thing. Unfortunately requiring a function call, and not in the doc online AFAICS butdoc is doc. Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: Python Requirements
On Sat, Jul 18, 2015 at 7:37 AM, Luke Harrison lukeharriso...@gmail.com wrote: As part of my A2 Computing coursework, I need to program a solution using Python 3.4. I also need to document the minimum requirements to run Python 3.4 on a Windows machine, including minimum RAM, minimum processing power, minimum hard disk space and monitor resolution. Simple answer: If it's capable of running a modern Windows, it's capable of running Python. There's no screen resolution requirements, and the RAM, CPU, and HD requirements depend more on what you do with Python than on the language itself. The easiest way to find out is to try it - grab the installer, plop it onto a system, see how much less disk space you have. Then start running code and see how efficient it is. There's a world of difference between the RAM/CPU requirements of Hello, world and a program that does video processing, and that's true regardless of the language. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
