RE: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
Date: Thu, 18 Apr 2013 15:53:15 -0700 From: dreamingforw...@gmail.com To: types-l...@lists.seas.upenn.edu Subject: Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages I am very thankful for the references given by everyone. Unfortunately my library does not have the titles and it will be some time before I can acquire them. The official version of my PhD thesis is available at https://scholarship.rice.edu/handle/1911/70199 (A version more suitable for electronic browsing and online distribution is available at http://sdrv.ms/15qsJ5x ) -Moez -- http://mail.python.org/mailman/listinfo/python-list
Re: Encoding NaN in JSON
On 2013-04-19 10:34, Tim Roberts wrote:
Miki Tebeka miki.teb...@gmail.com wrote:
I'm trying to find a way to have json emit float('NaN') as 'N/A'.
No. There is no way to represent NaN in JSON. It's simply not part of the
specification.
I know that. I'm trying to emit the *string* 'N/A' for every NaN.
You understand that this will result in a chunk of text that is not JSON?
Other JSON readers won't be able to read it.
I think he means something like this:
json.dumps([float('nan')])
'[N/A]'
Not
'[N/A]'
--
Robert Kern
I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth.
-- Umberto Eco
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Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
I don't quite think I understand what you are saying. Are you saying that mathematical models are not a good foundation for computer science because computers are really made out of electronic gates? All I need to do is show that my model reduces to some basic physical implementation (with perhaps some allowances for infinity) and then I can promptly forget about that messy business and proceed to use my clean mathematical model. The reason any model of computation exists is that it is easier to think about a problem in some terms than in others. By showing how to transform one model to another you make it possible to choose exactly how you wish to solve a problem. The reason we do not work directly in what are called von Neumann machines is that they are not convenient for all kinds of problems. However we can build a compiler to translate anything to anything else so we I don't see why anybody would care. On Thu, Apr 18, 2013 at 5:53 PM, Mark Janssen dreamingforw...@gmail.comwrote: [ The Types Forum, http://lists.seas.upenn.edu/mailman/listinfo/types-list] On Mon, Apr 15, 2013 at 2:53 AM, Moez AbdelGawad moeza...@outlook.com wrote: I'm not quite sure I understand your question, but I'll give it a shot. :-) I'm in this same camp too :) I am very thankful for the references given by everyone. Unfortunately my library does not have the titles and it will be some time before I can acquire them. I hope it not too intrusive to offer a few points that I've garnered from this conversation until I can study the history further. The main thing that I notice is that there is a heavy bias in academia towards mathematical models. I understand that Turing Machines, for example, were originally abstract computational concepts before there was an implementation in hardware, so I have some sympathies with that view, yet, should not the Science of Computer Science concern itself with how to map these abstract computational concepts into actual computational hardware? Otherwise, why not keep the field within mathematics and philosophy (where Logic traditionally has been)? I find it remarkable, for example, that the simple continued application of And/Or/Not gates can perform all the computation that C.S. concerns itself with and these form the basis for computer science in my mind, along with Boolean logic. (The implementation of digital logic into physical hardware is where C.S. stops and Engineering begins, I would argue.) But still, it seems that there are two ends, two poles, to the whole computer science enterprise that haven't been sufficiently *separated* so that they can be appreciated: logic gates vs. logical calculus and symbols. There is very little crossover as I can see. Perhaps the problem is the common use of the Greek root logikos; in the former, it pertains to binary arithmetic, where in the latter, it retains it's original Greek pertaining to *speech* and symbols, logos). Further, one can notice that in the former, the progression has been towards more sophisticated Data Structures (hence the evolution towards Object-Orientation), where in the latter (I'm guessing, since it's not my area of expertise) the progression has been towards function sophistication (where recursion seems to be paramount). In any case, I look forward to diving into the books and references you've all offered so generously so that I can appreciate the field and its history better. Mark Janssen Pacific Lutheran University Tacoma, Washington -- http://mail.python.org/mailman/listinfo/python-list
Re: The type/object distinction and possible synthesis of OOP and imperative programming languages
On Fri, Apr 19, 2013 at 1:35 PM, rusi rustompm...@gmail.com wrote: If I have a loop: while i len(a) and a[i] != x: i++ I need to understand that at the end of the loop: i = len(a) or a[i] == x and not i = len(a) and a[i] == x nor i == len(a) or a[i] == x # What if I forgot to initialize i? Or your program has crashed out with an exception. i,a,x=-10,test,q while i len(a) and a[i] != x: i+=1 Traceback (most recent call last): File pyshell#69, line 1, in module while i len(a) and a[i] != x: IndexError: string index out of range Or if that had been in C, it could have bombed with a segfault rather than a nice tidy exception. Definitely initialize i. But yeah, the basis of algebra is helpful, even critical, to understanding most expression evaluators. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
Mark Janssen writes: The main thing that I notice is that there is a heavy bias in academia towards mathematical models. I understand that Turing Machines, for example, were originally abstract computational concepts before there was an implementation in hardware, so I have some sympathies with that view, yet, should not the Science of Computer Science concern itself with how to map these abstract computational concepts into actual computational hardware? I think there is some misunderstanding here. Being mathematical in academic work is a way of making our ideas rigorous and precise, instead of trying to peddle wooly nonsense. Providing a mathematical description does not imply in any way that these ideas are not implementable on machines. In fact, very often these mathematical descriptions state precisely how to implement the concepts (called operational semantics), but using mathematical notation instead of program code. The mathematical notation used here is usually no more than high school set theory, used in a stylized way. In contrast, there are deeper mathematical models (called denotational semantics and axiomatic semantics) which are invented to describe how programming language features work in a deep, intrinsic way. This is similar to, for instance, how Physics invents mathematical models to capture how the nature around us works. Physicists don't need to implement nature. It has already been implemented for us before we are born. However, to understand how it works, and how to design systems using physical materials in a predictable way, we need the mathematical models that Physics has develeped. Similarly, the mathematical models of programming languages help us to obtain a deep understanding of how languages work and how to build systems in a predictable, reliable way. It seems too much to expect, at the present stage of our field, that all programmers should understand the mathematical models. But I would definitely expect that programming language designers who are trying to build new languages should understand the mathematical models. Otherwise, they would be like automotive engineers trying to build cars without knowing any Mechanics. Cheers, Uday Reddy -- Prof. Uday ReddyTel: +44 121 414 2740 Professor of Computer Science Fax: +44 121 414 4281 School of Computer Science University of BirminghamEmail: u.s.re...@cs.bham.ac.uk Edgbaston Birmingham B15 2TT Web: http://www.cs.bham.ac.uk/~udr -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
The main thing that I notice is that there is a heavy bias in academia towards mathematical models. I understand that Turing Machines, for example, were originally abstract computational concepts before there was an implementation in hardware, so I have some sympathies with that view, yet, should not the Science of Computer Science concern itself with how to map these abstract computational concepts into actual computational hardware? I prefer to think of Turing machines as an attempt to model existing and imagined hardware (at the time, mostly human computers, or groups of them with comparatively simple tools). See sections 1. and 9. in Turing, On computable numbers, with an application to the Entscheidungsproblem, http://web.comlab.ox.ac.uk/oucl/research/areas/ieg/e-library/sources/tp2-ie.pdf Modeling existing systems, in order to be able to reason about them, is essential for science, as is translating models into experiments, in order to compare predictions to reality. Claus -- http://mail.python.org/mailman/listinfo/python-list
Re: How to set my gui?
On Thu, 18 Apr 2013 23:24:29 +0200, Tracubik wrote: Hi all! I'm trying to make a simple program that essentially do this: 1) open a html file (extracted epub file) 2) search for occurrences like ita-ly 3) put them on a simple GUI: 1 text field and two buttons: keepy it and correct it (i.e. it will become italy) now this is quite simple but how can i do it properly? i suppose i've to first generate the window and than populate it, but where i've to put the search for occurences code? I don't think init() is the right place.. Thanks MedeoTL One simple way Make a method to search for the next occorance use that as button click event. -- Faith: not *wanting* to know what is true. -- Friedrich Nietzsche -- http://mail.python.org/mailman/listinfo/python-list
Re: How to set my gui?
Hi, These days, GUI programming is to me just programming and calling on certain libraries/modules. +1 One thing you may want to consider is using your main thread for the UI, and spinning off another thread to do your search. But do that ONLY if you know you understand threads, and threading in Python. Otherwise you'll make your life unnecessarily hard. :) For simple tasks, you don't need threads, but can use the glib-functions timeout_add(), idle_add() etc. Roland -- http://mail.python.org/mailman/listinfo/python-list
RE: subprocess.call
Hi Team, In my python script, I have this: command=lynx -dump 'phpscript?param1=%sparam2=%sparam3=%sparam4=%sparam5=%s'%(value1,value2,value3,value4) result=subprocess.call(command,shell=True) print 'xml message' However, the response from running the php script is also printed on output screen. I don't want this output. How can i ensure that only the last print 'xml response' is returned? Saludos Ombongi Moraa Faith -- http://mail.python.org/mailman/listinfo/python-list
Re: subprocess.call
Il 19/04/2013 11:56, Ombongi Moraa Fe ha scritto: Hi Team, In my python script, I have this: command=lynx -dump 'phpscript?param1=%sparam2=%sparam3=%sparam4=%sparam5=%s'%(value1,value2,value3,value4) http://docs.python.org/2/library/subprocess.html#module-subprocess You should set the properly values for stdou and stderr. Under UNIX, '/dev/null' worked out fine for me, when 'None' didn't. M. -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
On Thu, 18 Apr 2013 17:14:13 -0400, Robert Harper wrote: In short, there is no such thing as a paradigm. Of course there is. A paradigm is a distinct way of thinking, a philosophy if you will. To say that there is no such thing as a paradigm is to say that all ways of thinking about a topic are the same, and that's clearly nonsense. OOP is a distinct paradigm from procedural programming, even though the distinctions are minor when compared to those between imperative and functional programming. Java's everything in a class style of programming is very distinct from Pascal's functions and records style of programming, even though both are examples of imperative programming. They lead to different styles of coding, they have different strengths and weaknesses, and even taking into account differences of syntax, they differ in what you can do simply and naturally without the language getting in the way. I agree fully. This term is a holdover from the days when people spent time and space trying to build taxonomies based on ill-defined superficialities. See Steve Gould's essay What, If Anything, Is A Zebra?. You'll enjoy learning that there is, in fact, no such thing as a zebra---there are, rather, three different striped horse-like mammals, two of which are genetically related, and one of which is not. All life on earth is genetically related. Even if the so-called tree of life doesn't have a single common ancestor, it has a single set of common ancestors. In the case of the three species of zebra, they are all members of the genus Equus, so they are actually *extremely* closely related. The argument that zebra is not a genealogical group (which is very different from the false statement that there is no such thing as a zebra!) is that one of the three species of zebra is in fact more closely related to non-zebras than the other two species of zebra. Something like this tree: Common ancestor of all Equus | +-- Common ancestor of Burchell's Zebras and Grevy's Zebras | +-- Burchell's Zebra | +-- Grevy's Zebra | +-- Common ancestor of horses and Mountain Zebras +-- Horse +-- Mountain Zebra (I've left out asses and donkeys because I'm not sure where they fit in relation to the others.) There's no natural genealogical group that includes all three species of zebra that doesn't also include horses. But that doesn't mean that there's no reasonable non-genealogical groups! For example, all three species of zebra have fewer than 50 chromosome pairs, while all other Equus species have more than 50 pairs. Based on physical characteristics rather than ancestry, zebras make up a perfectly good group, distinct from other members of Equus. To put it another way, the three species of zebra may not make up a natural group when considered by lines of descent, but they do make up a natural group when considered by other factors. The propensity to be striped, like the propensity to have five things (fingers, segments, whatever) is a deeply embedded genetic artifact that expresses itself in various ways. Zebra is not a classification of thing that is striped, but a specific subset of such things, and stripes are only one of many distinguishing features. Cladistics is an important classification scheme, but it is not the only valid such scheme. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: dynamic forms generation
Well I think since we are using django anyway (and bottle on the API side) I'm not sure why we would use flask forms for this.. Anyway the main question is probably, is it worth to try to define a DSL or not? The problem I see is that we have a lot and very complex requirements, trying to define a DSL that is able to represent everything might be a massive pain. I prefer to do something smart with metaclasses and just use Python as the configuration language itself, using metaclasses and similar nice things to define the language used.. The only annoying part is the persistance, I don't like too much the idea to store Python code in the db for example, but maybe it's fine, many projects configure things with Python anyway.. -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
In article 517131cd$0$29977$c3e8da3$54964...@news.astraweb.com, Steven D'Aprano steve+comp.lang.pyt...@pearwood.info wrote: On Thu, 18 Apr 2013 17:14:13 -0400, Robert Harper wrote: In short, there is no such thing as a paradigm. Of course there is. A paradigm is a distinct way of thinking, a philosophy if you will. To say that there is no such thing as a paradigm is to say that all ways of thinking about a topic are the same, and that's clearly nonsense. This thread has gone off in a strange direction. When I said: One of the nice things about OOP is it means so many different things to different people. All of whom believe with religious fervor that they know the true answer. I was indeed talking about the ways people think about programming. For example, OOP in C++ is very much about encapsulation. People declare all data private, and writing setter/getter functions which carefully control what access outside entities have to your data. Often, when you talk to C++ people, they will tell you that encapsulation is what OOP is all about. What they are doing is saying, C++ isa OOPL, and C++ has encapsulation, therefore OOPL implies encapsulation. When they look at something like Python, they say, That's not object oriented because you don't have private data. I suppose people who grew up learning Python as their first language look at something like C++ and say, That's not OOP because classes aren't objects, or something equally silly. -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
On Fri, Apr 19, 2013 at 11:07 PM, Roy Smith r...@panix.com wrote: I was indeed talking about the ways people think about programming. For example, OOP in C++ is very much about encapsulation. People declare all data private, and writing setter/getter functions which carefully control what access outside entities have to your data. The funny thing about that notion is that, even in C++, it's completely optional. I've subclassed someone else's class using a struct and just left everything public. In fact, I've gotten so used to the Python way of doing things that now I'm quite happy to run everything public anyway. Is OOP truly about X if X is optional? ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Request
Good day, I need help on how to upgradean SAES to AES 128 bits. thank you -- *Usman M. Joda (zhoda), * * * * * *Master Student of Computer Science Technology,* * * * * * * *Liaoning University Of Technology (LUT), * * * * * * * *+8613840619645* * * * usmanjo...@yahoo.com * * * * Zhinzou- China* -- http://mail.python.org/mailman/listinfo/python-list
Feature Request: `operator.not_in`
I believe that I read somewhere that this is the place to start discussions on feature requests, etc. Please let me know if this isn't the appropriate venue (and what the appropriate venue would be if you know). This request has 2 related parts, but I think they can be considered seperately: 1) It seems to me that the operator module should have a `not_in` or `not_contains` function. It seems asymmetric that there exists a `is_not` function which implements `x is not y` but there isn't a function to represent `x not in y`. 2) I suspect this one might be a little more controversial, but it seems to me that there should be a separate magic method bound to the `not in` operator. Currently, when inspecting the bytecode, it appears to me that `not x in y` is translated to `x not in y` (this supports item 1 slightly). However, I don't believe this should be the case. In python, `x y` does not imply `not x = y` because a custom object can do whatever it wants with `__ge__` and `__lt__` -- They don't have to fit the normal mathematical definitions. I don't see any reason why containment should behave differently. `x in y` shouldn't necessarily imply `not x not in y`. I'm not sure if `object` could have a default `__not_contains__` method (or whatever name seems most appropriate) implemented equivalently to: def __not_contains__(self,other): return not self.__contains__(other) If not, it could probably be provided by something like `functools.total_ordering`. Anyway, it's food for thought and I'm interested to see if anyone else feels the same way that I do. Thanks, ~Matt -- http://mail.python.org/mailman/listinfo/python-list
Re: How to set my gui?
On 19/04/2013 10:42, Alister wrote: On Thu, 18 Apr 2013 23:24:29 +0200, Tracubik wrote: Hi all! I'm trying to make a simple program that essentially do this: 1) open a html file (extracted epub file) 2) search for occurrences like ita-ly 3) put them on a simple GUI: 1 text field and two buttons: keepy it and correct it (i.e. it will become italy) now this is quite simple but how can i do it properly? i suppose i've to first generate the window and than populate it, but where i've to put the search for occurences code? I don't think init() is the right place.. Thanks MedeoTL One simple way Make a method to search for the next occorance use that as button click event. Mmmmh, this seem good to me. But i also need to add some code in the __init__() of the GUI class to get the first occurence and put it in the text field. Thanks for your reply, you was really helpful MedeoTL -- http://mail.python.org/mailman/listinfo/python-list
Re: subprocess.call
Ombongi Moraa Fe moraa.lovetak...@gmail.com wrote:
[-- text/plain, encoding 7bit, charset: ISO-8859-1, 19 lines --]
In my python script, I have this:
command=lynx -dump
'phpscript?param1=%sparam2=%sparam3=%sparam4=%sparam5=%s'%(value1,value2,value3,value4)
result=subprocess.call(command,shell=True)
print 'xml message'
However, the response from running the php script is also printed on output
screen. I don't want this output.
How can i ensure that only the last print 'xml response' is returned?
You mean is printed out? Use subprocess.Popen() and redirect
stdout to a pipe, similar to this:
p = subprocess.Popen(command, stdout=subprocess.PIPE)
r = p.communicate()
print r[0] # This is the output (to stdout)
The return value of the Popen objects communicate() method is
a tuple with two elements, first contains what got written to
stdout (if redirected to a pipe, otherwise Nome), the second
what went to stderr (again if redirected to a pipe). If you
also redirect stdin then you can pass what you want to send
to the process spawned via Popen() as an argument to commu-
nicate().
BTW, according to the dicumentation you should split the
command line into its componenents and pass that as a list
to the call() or Popen() subprocess methods, so it would
seem to reasonable to use e.g.
command = [ 'lynx', '-dump',
( 'phpscript?param1={0}param2={1}param3={2}
param4={3}param5={4}' )
.format( value1, value2, value3, value4, value5 ) ]
Note that there was one value for creating the string to be
passed to lynx was mising.
Regards, Jens
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\__ http://toerring.de
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Re: Encoding NaN in JSON
On 2013-04-18, Wayne Werner wa...@waynewerner.com wrote:
On Wed, 17 Apr 2013, Miki Tebeka wrote:
I'm trying to find a way to have json emit float('NaN') as 'N/A'.
No. There is no way to represent NaN in JSON. It's simply not part of the
specification.
I know that. I'm trying to emit the *string* 'N/A' for every NaN.
Why not use `null` instead? It seems to be semantically more similar...
Why not use 'NaN' instead? It seems to be even more semantically
similar...
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Re: howto remove the thousand separator
pyth0n3r pyth0...@gmail.com wrote:
I came across a problem that when i deal with int data with ',' as
thousand separator, such as 12,916, i can not change it into int() or
float(). How can i remove the comma in int data?
Any reply will be appreciated!!
Parse it using the locale module, just be sure to set the correct locale
first:
import locale
locale.setlocale(locale.LC_ALL, '')
'English_United Kingdom.1252'
locale.atoi('1,000')
1000
locale.atof('1,000')
1000.0
locale.setlocale(locale.LC_ALL, 'French_France')
'French_France.1252'
locale.atof('1,000')
1.0
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Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
In article mailman.821.1366378384.3114.python-l...@python.org, Chris Angelico ros...@gmail.com wrote: On Fri, Apr 19, 2013 at 11:07 PM, Roy Smith r...@panix.com wrote: I was indeed talking about the ways people think about programming. For example, OOP in C++ is very much about encapsulation. People declare all data private, and writing setter/getter functions which carefully control what access outside entities have to your data. The funny thing about that notion is that, even in C++, it's completely optional. Well, yeah: #define private public #define protected public #include whatever.h Not to mention all sorts of horrible things you can do with pointers and const_cast, etc. But that doesn't stop people from thinking that somehow they've built some uber-protected cocoon around their data, and that this is part and parcel of what OOPL is all about. -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
On Sat, Apr 20, 2013 at 1:31 AM, Roy Smith r...@panix.com wrote: #define private public #define protected public #include whatever.h And: #define class struct But what I mean is that, _in my design_, I make everything public. No getters/setters, just direct member access. The theory behind getters and setters is that you can change the implementation without changing the interface... but I cannot remember a *single time* when I have made use of that flexibility. Not one. Nor a time when I've wished for that flexibility, after coding without it. No no, not one! ChrisA (He's telling the truth, he is not Mabel.) -- http://mail.python.org/mailman/listinfo/python-list
python : how to Opens folder with specified items selected on Windows
I want to Opens folder with specified items selected on Windows ,I looked up the The Windows Shell Reference found a function fit for this job SHOpenFolderAndSelectItems http://msdn.microsoft.com/en-us/library/windows/desktop/bb762232(v=vs.85).aspx but I cannot find an example on how to use it with python so anyone can give a little example ? I have another extra requirement :if that folder already open ,don??t open it again ,just activate it and selected the file-- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
In article mailman.824.1366386029.3114.python-l...@python.org, Chris Angelico ros...@gmail.com wrote: On Sat, Apr 20, 2013 at 1:31 AM, Roy Smith r...@panix.com wrote: #define private public #define protected public #include whatever.h And: #define class struct I suppose, while we're at it: # define const (I think that works, not sure). PS: a great C++ interview question is, What's the difference between a class and a struct? Amazing how few self-professed C++ experts have no clue. -- http://mail.python.org/mailman/listinfo/python-list
Re: python : how to Opens folder with specified items selected on Windows
On 19/04/2013 16:54, iMath wrote: I want to Opens folder with specified items selected on Windows ,I looked up the The Windows Shell Reference found a function fit for this job SHOpenFolderAndSelectItems http://msdn.microsoft.com/en-us/library/windows/desktop/bb762232(v=vs.85).aspx but I cannot find an example on how to use it with python so anyone can give a little example ? I have another extra requirement :if that folder already open ,don’t open it again ,just activate it and selected the file Have a look over here: http://mail.python.org/pipermail/python-win32/2012-September/012533.html TJG -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
On Fri, 19 Apr 2013 12:02:00 -0400, Roy Smith wrote: PS: a great C++ interview question is, What's the difference between a class and a struct? Amazing how few self-professed C++ experts have no clue. I'm not a C++ expert, but I am an inquiring mind, and I want to know the answer! -- Steven -- http://mail.python.org/mailman/listinfo/python-list
New release 0.19 of the Cython compiler
I'm happy to announce that Cython 0.19 has been released. This is a feature release of the Cython compiler that adds some major usability improvements especially for code that needs to run in both Py2 and Py3, as well as better Python compatibility and optimisations. http://cython.org/ You can get it from here: http://cython.org/release/Cython-0.19.tar.gz http://cython.org/release/Cython-0.19.zip Release notes: https://github.com/cython/cython/blob/29bf3493fdc80cb3261a9dfb9f73e3ccd46fec66/CHANGES.rst Documentation: http://docs.cython.org/ Major new features in this release: === * New directives ``c_string_type`` and ``c_string_encoding`` to automatically convert between C strings and the different Python string types. * Keyword arguments are supported for cdef functions, including external C/C++ library functions. * New freelist decorator for extension types. * Fast extension type instantiation using the ``Type.__new__(Type)`` idiom has gained support for passing arguments. * Slicing was optimised for several builtin types and otherwise conforms better with Python semantics for user defined types. * The mapping of dict view/item methods in Python 3 was improved. What is Cython? === Cython is an optimising static compiler for both the Python programming language and the extended Cython programming language (based on Pyrex). It makes writing C extensions for Python as easy as Python itself. The Cython language is a superset of the Python language that additionally supports calling C functions and declaring C types on variables and class attributes. This allows the compiler to generate very efficient C code from Cython code. The C code is generated once and then compiles with all major C/C++ compilers in CPython 2.4 and later, including Python 3.x. All of this makes Cython the ideal language for wrapping external C libraries, embedding CPython into existing applications, and for fast C modules that speed up the execution of Python code. See the project home page for further information: http://cython.org/ Have fun, Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Preparing sqlite, dl and tkinter for Python installation (no admin rights)
18.04.13 19:24, James Jong написав(ла): The file libtk8.6.so http://libtk8.6.so has 1.5M and is definitely there. So why did that compilation fail? LD_LIBRARY_PATH=/path_to_libtk However be careful. For now Python doesn't support Tk 8.6 (results of some functions changed in 8.6), this is a known bug (issue16809). You can build Python with Tk 8.6 and even run, but any real tkinter application likely will failed. Use Tk 8.5 instead. -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
On Fri, 19 Apr 2013 09:07:15 -0400, Roy Smith wrote: Often, when you talk to C++ people, they will tell you that encapsulation is what OOP is all about. What they are doing is saying, C++ isa OOPL, and C++ has encapsulation, therefore OOPL implies encapsulation. When they look at something like Python, they say, That's not object oriented because you don't have private data. I suppose people who grew up learning Python as their first language look at something like C++ and say, That's not OOP because classes aren't objects, or something equally silly. You might say that, but I find in my experience that Python users don't tend to fall for the No True Scotsman fallacy anywhere near as often as (say) Java or C++ users. I'm not sure what the reason for this is. Perhaps it is that the Python community as a whole is more open to other languages and paradigms, and less stuffed to the gills with code monkeys who only know how to copy and paste code from StackOverflow. The Python community frequently tosses around references to other languages, compares how Python would do something to other languages, or relates how certain features were borrowed from language X (e.g. list comprehensions are taken from Haskell; map, filter and reduce are taken from Lisp). But when I read forums and blogs about (say) Java, it's nearly always about Java in isolation, and one would be forgiven for thinking it was the only programming language in existence. I don't think that there is One True Way to design an OOP language, but I do think there are *degrees* of OOP. Java, for instance, I would say is only moderately OOP, since classes aren't objects, and it supports unboxed native types. I think the first part of that is a weakness, and the second is a pragmatic decision that on balance probably is a strength. Yes, Python's everything is an object is a cleaner design, but Java's unboxed types leads to faster code. It also depends on what you mean by OOP. If we judge Python by the fact that everything is an object, then it is strongly OOP. But if we judge Python by its syntax and idioms, it is only weakly OOP, even less than Java. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
On 4/19/2013 12:16 PM, Steven D'Aprano wrote: On Fri, 19 Apr 2013 12:02:00 -0400, Roy Smith wrote: PS: a great C++ interview question is, What's the difference between a class and a struct? Amazing how few self-professed C++ experts have no clue. I'm not a C++ expert, but I am an inquiring mind, and I want to know the answer! The only difference between a class and a struct is that classes default to private access for their members, and structs default to public. --Ned. -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
On Fri, Apr 19, 2013 at 4:16 PM, Steven D'Aprano steve+comp.lang.pyt...@pearwood.info wrote: On Fri, 19 Apr 2013 12:02:00 -0400, Roy Smith wrote: PS: a great C++ interview question is, What's the difference between a class and a struct? Amazing how few self-professed C++ experts have no clue. I'm not a C++ expert, but I am an inquiring mind, and I want to know the answer! C++ class members are private by default; struct members are public by default. That's the only difference as I recall. -- http://mail.python.org/mailman/listinfo/python-list
Ubuntu package python3 does not include tkinter
Am I mistaken in my belief that tkinter is a non-optional part of the Python language? I installed the python3 package on Ubuntu, and tkinter is not included--it's an optional package python3-tk that has to be installed separately. I reported this as a bug as was summarily slapped down. Can we apply some pressure to Ubuntu to fix this? Python is a trademark, is it not? Can Ubuntu legally claim that their Python package is an implementation of the language if it does not include the whole language? -- http://mail.python.org/mailman/listinfo/python-list
Re: Ubuntu package python3 does not include tkinter
On Fri, Apr 19, 2013 at 1:17 PM, lcrocker l...@piclab.com wrote: Am I mistaken in my belief that tkinter is a non-optional part of the Python language? I installed the python3 package on Ubuntu, and tkinter is not included--it's an optional package python3-tk that has to be installed separately. I reported this as a bug as was summarily slapped down. Can we apply some pressure to Ubuntu to fix this? Python is a trademark, is it not? Can Ubuntu legally claim that their Python package is an implementation of the language if it does not include the whole language? -- http://mail.python.org/mailman/listinfo/python-list From here: http://wiki.python.org/moin/TkInter Does this help? Try the correct command for your version at the Python prompt: import Tkinter # no underscore, uppercase 'T' for versions prior to V3.0 import tkinter # no underscore, lowercase 't' for V3.0 and later -- Joel Goldstick http://joelgoldstick.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Ubuntu package python3 does not include tkinter
Thanks, but I'm not having any trouble running tkinter, it works just fine. I have an issue with the fact that it's optional. It reflects badly on the language and community if we allow just anyone to call something Python that doesn't meet some minimum standard of quality. Java has its compliance tests: if your implementation doesn't pass, you can't call it Java. I'm asking if there's something similar for Python, because Ubuntu's Python 3 doesn't pass the test. -- http://mail.python.org/mailman/listinfo/python-list
Re: Ubuntu package python3 does not include tkinter
On 2013.04.19 12:17, lcrocker wrote: Am I mistaken in my belief that tkinter is a non-optional part of the Python language? I installed the python3 package on Ubuntu, and tkinter is not included--it's an optional package python3-tk that has to be installed separately. I reported this as a bug as was summarily slapped down. Forcing Tkinter as a dependency would result in a ton of things being installed to support it. Why should a web server using Django have X installed and running because Python /can/ support a GUI in the standard library? It's trivial to install Tkinter if you need it, but it would be a huge mess to try to remove it from an installation that requires it - even if you never use Tkinter. Ubuntu is far from alone here. FreeBSD (and probably the other BSDs) and most Linux distros do something similar. There is zero reason to force Tkinter and its dependencies on all Python users. -- CPython 3.3.0 | Windows NT 6.2.9200 / FreeBSD 9.1 -- http://mail.python.org/mailman/listinfo/python-list
Re: Ubuntu package python3 does not include tkinter
On Apr 19, 10:35 am, Andrew Berg bahamutzero8...@gmail.com wrote: On 2013.04.19 12:17, lcrocker wrote: Am I mistaken in my belief that tkinter is a non-optional part of the Python language? I installed the python3 package on Ubuntu, and tkinter is not included--it's an optional package python3-tk that has to be installed separately. I reported this as a bug as was summarily slapped down. Forcing Tkinter as a dependency would result in a ton of things being installed to support it. Why should a web server using Django have X installed and running because Python /can/ support a GUI in the standard library? It's trivial to install Tkinter if you need it, but it would be a huge mess to try to remove it from an installation that requires it - even if you never use Tkinter. Ubuntu is far from alone here. FreeBSD (and probably the other BSDs) and most Linux distros do something similar. There is zero reason to force Tkinter and its dependencies on all Python users. -- CPython 3.3.0 | Windows NT 6.2.9200 / FreeBSD 9.1 I understand that for something like a server distribution, but Ubuntu is a user-focused desktop distribution. It has a GUI, always. The purpose of a distro like that is to give users a good experience. If I install Python on Windows, I get to use Python. On Ubuntu, I don't, and I think that will confuse some users. I recently recommended Python to a friend who wants to start learning programming. Hurdles like this don't help someone like him. -- http://mail.python.org/mailman/listinfo/python-list
Re: Ubuntu package python3 does not include tkinter
lcrocker wrote: Am I mistaken in my belief that tkinter is a non-optional part of the Python language? I installed the python3 package on Ubuntu, and tkinter is not included--it's an optional package python3-tk that has to be installed separately. I reported this as a bug as was summarily slapped down. Can we apply some pressure to Ubuntu to fix this? Python is a trademark, is it not? Can Ubuntu legally claim that their Python package is an implementation of the language if it does not include the whole language? Thank you for bringing this criminal offense to our attention. Right now a PSU team is readying their black helicopters to get Mr Shuttleworth and his accompli -- http://mail.python.org/mailman/listinfo/python-list
Re: Ubuntu package python3 does not include tkinter
On Apr 19, 10:42 pm, lcrocker leedanielcroc...@gmail.com wrote: On Apr 19, 10:35 am, Andrew Berg bahamutzero8...@gmail.com wrote: On 2013.04.19 12:17, lcrocker wrote: Am I mistaken in my belief that tkinter is a non-optional part of the Python language? I installed the python3 package on Ubuntu, and tkinter is not included--it's an optional package python3-tk that has to be installed separately. I reported this as a bug as was summarily slapped down. Forcing Tkinter as a dependency would result in a ton of things being installed to support it. Why should a web server using Django have X installed and running because Python /can/ support a GUI in the standard library? It's trivial to install Tkinter if you need it, but it would be a huge mess to try to remove it from an installation that requires it - even if you never use Tkinter. Ubuntu is far from alone here. FreeBSD (and probably the other BSDs) and most Linux distros do something similar. There is zero reason to force Tkinter and its dependencies on all Python users. -- CPython 3.3.0 | Windows NT 6.2.9200 / FreeBSD 9.1 I understand that for something like a server distribution, but Ubuntu is a user-focused desktop distribution. It has a GUI, always. The purpose of a distro like that is to give users a good experience. If I install Python on Windows, I get to use Python. On Ubuntu, I don't, and I think that will confuse some users. I recently recommended Python to a friend who wants to start learning programming. Hurdles like this don't help someone like him. Well I guess you could take the example of kde. kde has a kde-standard and a kde-full. Likewise one could imagine python-standard being what is currently called python and python-full pulling in other dependencies like tkinter. If there were a number of such it may even make sense, if not it looks like overkill (to me) -- http://mail.python.org/mailman/listinfo/python-list
unzipping a zipx file
I have python 2.6.2 and I trying to get it to unzip a file made with winzip pro. The file extension is zipx. This is on a windows machine where I have to send them all that files necessary to run. I am packaging this with py2exe. I can open the file with zFile = zipfile.ZipFile(fullPathName,'r') and I can look through all the file in the archive for filename in zFile.namelist(): but when I write the file out with this code: ozFile = open(filename,'w') ozFile.write(zFile.read(filename)) ozFile.close() that file still looks encrypted. No errors are thrown. The file is just a text file not a jpeg or anything else. I can open the file with 7zip and extract the text file out just fine. What am I missing? Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: Ubuntu package python3 does not include tkinter
On 2013.04.19 12:42, lcrocker wrote: I understand that for something like a server distribution, but Ubuntu is a user-focused desktop distribution. It has a GUI, always. That is incorrect. http://www.ubuntu.com/server -- CPython 3.3.0 | Windows NT 6.2.9200 / FreeBSD 9.1 -- http://mail.python.org/mailman/listinfo/python-list
Re: Encoding NaN in JSON
On Fri, Apr 19, 2013 at 4:54 PM, Grant Edwards invalid@invalid.invalid wrote:
On 2013-04-18, Wayne Werner wa...@waynewerner.com wrote:
On Wed, 17 Apr 2013, Miki Tebeka wrote:
I'm trying to find a way to have json emit float('NaN') as 'N/A'.
No. There is no way to represent NaN in JSON. It's simply not part of the
specification.
I know that. I'm trying to emit the *string* 'N/A' for every NaN.
Why not use `null` instead? It seems to be semantically more similar...
Why not use 'NaN' instead? It seems to be even more semantically
similar...
Because there is no NaN in JSON? Unless you mean a string, which
makes no semantical sense and is human-oriented and not
machine-oriented.
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Re: Feature Request: `operator.not_in`
On 4/19/2013 10:27 AM, Matthew Gilson wrote: ) It seems to me that the operator module should have a `not_in` or `not_contains` function. It seems asymmetric that there exists a `is_not` function which implements `x is not y` but there isn't a function to represent `x not in y`. There is also no operator.in. There is operator.contains and operator.__contains__. There is no operator.not_contains because there is no __not_contains__ special method. (Your point two, which I disagree with.) 2) I suspect this one might be a little more controversial, but it seems to me that there should be a separate magic method bound to the `not in` operator. The reference manual disagrees. The operator not in is defined to have the inverse true value of in. Currently, when inspecting the bytecode, it appears to me that `not x in y` is translated to `x not in y` (this supports item 1 slightly). However, I don't believe this should be the case. In python, `x y` does not imply `not x = y` because a custom object can do whatever it wants with `__ge__` and `__lt__` -- They don't have to fit the normal mathematical definitions. The reason for this is that the rich comparisons do not have to return boolean values, and do not for numarray arrays which, I believe, implement the operators itemwise. I don't see any reason why containment should behave differently. 'Design by analogy' is tricky because analogies often leave out important details. __contains__ *is* expected to return true/false. object.__contains__(self, item) Called to implement membership test operators. Should return true if item is in self, false otherwise -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: unzipping a zipx file
In mailman.834.1366394500.3114.python-l...@python.org b_erickson1 br...@dashley.net writes: ozFile = open(filename,'w') ozFile.write(zFile.read(filename)) ozFile.close() Perhaps you want to use zFile.extract() instead of zFile.read()? -- John Gordon A is for Amy, who fell down the stairs gor...@panix.com B is for Basil, assaulted by bears -- Edward Gorey, The Gashlycrumb Tinies -- http://mail.python.org/mailman/listinfo/python-list
Re: Ubuntu package python3 does not include tkinter
On 4/19/2013 1:17 PM, lcrocker wrote: Am I mistaken in my belief that tkinter is a non-optional part of the Python language? Yes. The PSF CPython Windows installer makes installation of tcl/tk/tkinter optional. The build files will compile and build Python without tkinter and without other modules that depend on other c libraries (example, lzma). I believe one can build python 2 without unicode, which is much more 'core' than the Tkinter module. I installed the python3 package on Ubuntu, and tkinter is not included--it's an optional package python3-tk that has to be installed separately. I reported this as a bug as was summarily slapped down. I hope it was done politely ;-). Overall, Ubuntu is relatively advanced in moving to new versions. I believe I read that they are hoping to make 3.3 the default Python as soon as possible. -- http://mail.python.org/mailman/listinfo/python-list
Re: unzipping a zipx file
In kks2mi$54d$1...@reader1.panix.com John Gordon gor...@panix.com writes: In mailman.834.1366394500.3114.python-l...@python.org b_erickson1 br...@dashley.net writes: ozFile = open(filename,'w') ozFile.write(zFile.read(filename)) ozFile.close() Perhaps you want to use zFile.extract() instead of zFile.read()? No, that's not it. Your code should work. You said the output file 'looks encrypted'. Is the source zip file encrypted? Is the source text file something other than plain ASCII? -- John Gordon A is for Amy, who fell down the stairs gor...@panix.com B is for Basil, assaulted by bears -- Edward Gorey, The Gashlycrumb Tinies -- http://mail.python.org/mailman/listinfo/python-list
Toolbar and PyQT
Hi, i'm new with python, so i need an help about this problem. I've implemented a toolbar in a QDialog box: from matplotlib.backends.backend_qt4agg import NavigationToolbar2QTAgg as NavigationToolbar . self.toolbar = NavigationToolbar(self.canvas, self) I've found this code on internet. I have two question: 1. How i can set that toolbar (if possible) with QtDesigner? 2. If i want to modify that toolbar, for example adding a function during axis settings, is it possible? Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode issue with Python v3.3
Hello Cameron, Did you received my yesterday's mail? -- http://mail.python.org/mailman/listinfo/python-list
Re: Feature Request: `operator.not_in`
On 4/19/13 2:27 PM, Terry Jan Reedy wrote: On 4/19/2013 10:27 AM, Matthew Gilson wrote: ) It seems to me that the operator module should have a `not_in` or `not_contains` function. It seems asymmetric that there exists a `is_not` function which implements `x is not y` but there isn't a function to represent `x not in y`. There is also no operator.in. True. I'm not arguing that there should be ... There is operator.contains and operator.__contains__. Thankfully :-) There is no operator.not_contains because there is no __not_contains__ special method. (Your point two, which I disagree with.) But there's also no special method `__is_not__`, but there's a corresponding `is_not` in the operator module so I don't really see that argument. It's a matter of functionality that I'm thinking about in the first part. itertools.starmap(operator.not_in,x,y) vs. itertools.starmap(lambda a,b: a not in b,x,y) Pretty much every other operator in python (that I can think of) has an analogous function in the operator module. 2) I suspect this one might be a little more controversial, but it seems to me that there should be a separate magic method bound to the `not in` operator. The reference manual disagrees. The operator not in is defined to have the inverse true value of in. I would still leave that as the default behavior. It's by far the most useful and commonly expected. And I suppose if you *can't* have default behavior like that because that is a special case in itself, then that makes this second part of the request dead in the water at the outset (and I can live with that explanation). Currently, when inspecting the bytecode, it appears to me that `not x in y` is translated to `x not in y` (this supports item 1 slightly). However, I don't believe this should be the case. In python, `x y` does not imply `not x = y` because a custom object can do whatever it wants with `__ge__` and `__lt__` -- They don't have to fit the normal mathematical definitions. The reason for this is that the rich comparisons do not have to return boolean values, and do not for numarray arrays which, I believe, implement the operators itemwise. Yes, you're correct about numpy arrays behaving that way. It can be very useful for indexing them. It would also be fine for a special method `__not_contains__` to be expected to return a boolean value as well. It could still be very useful. Consider a finite square well from quantum mechanics. I could define `in` for my particle in the square well to return `True` if there is a 70% chance that it is located in the well (It's a wave-function, so it doesn't have a well defined position -- the particle could be anyway, but 7 out of 10 measurements will tell me it's in the well). It might be nice if I could define `not in` to be `True` if there is only a 30% chance that it is in the well. Of course, this leaves us with a no-man's land around the 50% mark. Is it in the well or not? There's no telling. I'm sure you could argue that this sort of thing *could* be done with rich comparisons, but I would consider that a deflection from the point at hand. It seems it should be up to the user to design the API most suited for their task. Or what about a `Fraternity` class. Are the new pledges in the fraternity or not? Maybe they should be considered neither in, nor out until pledge season is over. I don't see any reason why containment should behave differently. 'Design by analogy' is tricky because analogies often leave out important details. __contains__ *is* expected to return true/false. object.__contains__(self, item) Called to implement membership test operators. Should return true if item is in self, false otherwise -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Encoding NaN in JSON
On 2013-04-19, Chris ???Kwpolska??? Warrick kwpol...@gmail.com wrote:
On Fri, Apr 19, 2013 at 4:54 PM, Grant Edwards invalid@invalid.invalid
wrote:
On 2013-04-18, Wayne Werner wa...@waynewerner.com wrote:
On Wed, 17 Apr 2013, Miki Tebeka wrote:
I'm trying to find a way to have json emit float('NaN') as 'N/A'.
No. There is no way to represent NaN in JSON. It's simply not part of
the
specification.
I know that. I'm trying to emit the *string* 'N/A' for every NaN.
Why not use `null` instead? It seems to be semantically more similar...
Why not use 'NaN' instead? It seems to be even more semantically
similar...
Because there is no NaN in JSON? Unless you mean a string, which
makes no semantical sense and is human-oriented and not
machine-oriented.
The OP asked for a string, and I thought you were proposing the string
'null'. If one is to use a string, then 'NaN' makes the most sense,
since it can be converted back into a floating point NaN object.
I infer that you were proposing a JSON null value and not the string
'null'?
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Re: Encoding NaN in JSON
You understand that this will result in a chunk of text that is not JSON?
I think he means something like this:
json.dumps([float('nan')])
'[N/A]'
That's exactly what I mean :)
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Re: unzipping a zipx file
On 04/19/2013 01:59 PM, b_erickson1 wrote: I have python 2.6.2 and I trying to get it to unzip a file made with winzip pro. The file extension is zipx. This is on a windows machine where I have to send them all that files necessary to run. I am packaging this with py2exe. I can open the file with zFile = zipfile.ZipFile(fullPathName,'r') and I can look through all the file in the archive for filename in zFile.namelist(): but when I write the file out with this code: ozFile = open(filename,'w') ozFile.write(zFile.read(filename)) ozFile.close() that file still looks encrypted. No errors are thrown. The file is just a text file not a jpeg or anything else. I can open the file with 7zip and extract the text file out just fine. What am I missing? Thanks The second parameter to ZipFile() probably should be 'rb' not 'r' Likewise, I'd suggest using 'wb' on the output file, though that's not your problem here. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: unzipping a zipx file
On 2013-04-19 16:29, Dave Angel wrote: zFile = zipfile.ZipFile(fullPathName,'r') The second parameter to ZipFile() probably should be 'rb' not 'r' Just for the record, the zipfile.ZipFile.__init__ maps r to open the file with rb, so that's not the issue. Your suggestion about opening the file to write in binary mode is a good one, but I'd just suggest using ZipFile.extract(...) which is built in and takes care of writing the file for you. :-) -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
I wrote: I suppose people who grew up learning Python as their first language look at something like C++ and say, That's not OOP because classes aren't objects, or something equally silly. In article 517172e7$0$29977$c3e8da3$54964...@news.astraweb.com, Steven D'Aprano steve+comp.lang.pyt...@pearwood.info wrote: You might say that, but I find in my experience that Python users don't tend to fall for the No True Scotsman fallacy anywhere near as often as (say) Java or C++ users. Now that I think about it, I suspect relatively few people learned Python as their first programming language. Java, for example, is very popular as a teaching language in colleges and universities. There are lots of people who go through a 4-year program, do all of their coursework in Java, and come out as one-trick ponies. There aren't many schools who teach Python as a first (and only language), but I suppose it's starting to catch on. 5 years from now, we may see waves of kids graduating from college knowing nothing but Python, with a similarly narrow view of the universe. -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
In article mailman.843.1366412626.3114.python-l...@python.org, Dennis Lee Bieber wlfr...@ix.netcom.com wrote: On Fri, 19 Apr 2013 12:02:00 -0400, Roy Smith r...@panix.com declaimed the following in gmane.comp.python.general: PS: a great C++ interview question is, What's the difference between a class and a struct? Amazing how few self-professed C++ experts have no clue. It's been 15+ years but... class defaults to private; struct defaults to public... (very simplified G) You were doing well until you added the very simplified part :-) That is indeed the only difference. Many people are surprised that you can write member functions for structs. Or that you can subclass (substruct?) them. -- http://mail.python.org/mailman/listinfo/python-list
Re: [TYPES] The type/object distinction and possible synthesis of OOP and imperative programming languages
On Fri, 19 Apr 2013 19:37:38 -0400, Roy Smith wrote: There aren't many schools who teach Python as a first (and only language), but I suppose it's starting to catch on. 5 years from now, we may see waves of kids graduating from college knowing nothing but Python, with a similarly narrow view of the universe. Send the young whipper-snappers here, we'll soon learn 'em better! -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Ubuntu package python3 does not include tkinter
On Fri, 19 Apr 2013 10:17:58 -0700, lcrocker wrote: Am I mistaken in my belief that tkinter is a non-optional part of the Python language? I installed the python3 package on Ubuntu, and tkinter is not included--it's an optional package python3-tk that has to be installed separately. I reported this as a bug as was summarily slapped down. Personally, I think that is a silly design by Ubuntu, but tkinter is optional and they're free to distribute Python with or without it. That becomes a *quality of implementation* issue: some distributions may be more complete, easier to install, more up-to-date, etc. than others, but they're still Python. There is Python the language, which is distinct from the CPython implementation (to say nothing of other implementations like Jython, IronPython, Stackless, PyPy, ...), and then there is the standard library. Much of the standard library is optional, although unfortunately the documentation doesn't really make that as clear as it should. Tkinter depends on you have Tk/Tcl installed, which on Linux and Unix systems depends on you having X installed. Personally, I think that a good packaging system should ensure that once you install Tk/Tcl, tkinter should just work. But there may be technical reasons why this is impossible. If you ever build Python from source, you will often get warnings that it could not build certain modules. I spent a fruitless couple of hours last week trying to install Python 2.7 from scratch with sqlite, before giving up. What I got was still Python 2.7. It was just Python 2.7 without sqlite (and four or five other modules, which I don't care about and don't remember). Can we apply some pressure to Ubuntu to fix this? Python is a trademark, is it not? Can Ubuntu legally claim that their Python package is an implementation of the language if it does not include the whole language? Tkinter is not part of the language. The tkinter module is an interface to another language, not part of Python the language itself. There are platforms where Tk/Tcl do not exist, platforms which may not even have a GUI environment at all. Do you really intend to say that it is forbidden to have Python on such platforms? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: unzipping a zipx file
On Fri, 19 Apr 2013 17:59:26 +, b_erickson1 wrote: I have python 2.6.2 and I trying to get it to unzip a file made with winzip pro. The file extension is zipx. This is on a windows machine where I have to send them all that files necessary to run. I am packaging this with py2exe. I can open the file with zFile = zipfile.ZipFile(fullPathName,'r') and I can look through all the file in the archive for filename in zFile.namelist(): but when I write the file out with this code: ozFile = open(filename,'w') ozFile.write(zFile.read(filename)) ozFile.close() that file still looks encrypted. No errors are thrown. The file is just a text file not a jpeg or anything else. I can open the file with 7zip and extract the text file out just fine. What am I missing? You are missing that zipx is not the same as zip, and Python very likely does not support the zipx compression algorithm. http://kb.winzip.com/kb/entry/7/ My guess is that the zipx header is similar enough to zip that Python can retrieve the file names, but it cannot decompress the files. Unfortunately, instead of getting a nice error, it is fooled into thinking that it decompressed when in fact you just got junk. I suggest that you start with a simple example: create a plain text file with just a few words. Compress this single file to .zipx, then try to decompress it using Python. If it still fails, you will have a simple example that you could post here and see if others have more success. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: unzipping a zipx file
On 04/19/2013 08:24 PM, Steven D'Aprano wrote: SNIP You are missing that zipx is not the same as zip, and Python very likely does not support the zipx compression algorithm. http://kb.winzip.com/kb/entry/7/ My guess is that the zipx header is similar enough to zip that Python can retrieve the file names, but it cannot decompress the files. Unfortunately, instead of getting a nice error, it is fooled into thinking that it decompressed when in fact you just got junk. The zip header includes a 32bit CRC for each file. Do you know whether the zip module checks that CRC ? I suggest that you start with a simple example: create a plain text file with just a few words. Compress this single file to .zipx, then try to decompress it using Python. If it still fails, you will have a simple example that you could post here and see if others have more success. -- DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: How to set my gui?
On Sat, Apr 20, 2013 at 9:10 AM, Dennis Lee Bieber wlfr...@ix.netcom.com wrote: On Fri, 19 Apr 2013 09:24:36 +1000, Chris Angelico ros...@gmail.com declaimed the following in gmane.comp.python.general: On Fri, Apr 19, 2013 at 8:57 AM, Walter Hurry walterhu...@lavabit.com wrote: On Fri, 19 Apr 2013 08:00:11 +1000, Chris Angelico wrote: But 1 Corinthians 13:11 You are grown up now, I surmise. :) Born in 1984, so that'll give you some idea where I was in the 1990s. A puppy to be taught by greymuzzles (unfortunately, /this/ greymuzzle [1958] has reached the point of being an old dog that only learns new tricks with extreme difficulty G) Yep, taught by my Dad, who has often told the story of how he once held a whole kilobyte of memory in his hands (something like a cubic meter in size). He introduced me to programming, to fiddling with the system configs (actually he forbade that, for ages - because he had to clean up the mess if the system wouldn't boot), and to the joys of networking. So in a large way he's why I'm a geek... and actually he started that even earlier, when I was given the name Chris at birth. That on its own probably is the biggest cause of my geekery, I think! ChrisA -- http://mail.python.org/mailman/listinfo/python-list
Different cache filename
Hi, when load a module mymodule.py with importlib.machinery.SourceFileLoader a bytecode file is created as mymodule.cpython-33.pyc. If I load a module mymodule.ext.py the same way the same bytecode file is created as mymodule.cpython-33.pyc. Is there any way I could tell python to generate the bycode file as mymodule.ext.cpython-33.pyc? Regards, Fabian -- http://mail.python.org/mailman/listinfo/python-list
[issue14364] Argparse incorrectly handles '--'
paul j3 added the comment:
The patch that I recently submitted for http://bugs.python.org/issue13922
appears to solve this issue. It only removes the '--' that marked the end of
options.
With:
parser = argparse.ArgumentParser()
parser.add_argument('-f','--foo')
print(parser.parse_args(['-f--']))
print(parser.parse_args(['--foo=--']))
print(parser.parse_args(['-f', '--']))
I get:
Namespace(foo='--')
Namespace(foo='--')
usage: foodash.py [-h] [-f FOO]
foodash.py: error: argument -f/--foo: expected one argument
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[issue17760] No i18n of IDLE's interface in french
Antoine Pitrou added the comment: The target is different though (especially the target of Firefox). Kate might be used mainly by developers, but it's also used by non-developers and it's probably translated also because all the KDE programs are. Mercurial would be a better example against my point. Or Kdevelop, Eclipse, etc. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17760 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue14364] Argparse incorrectly handles '--'
Michele Orrù added the comment: wow, I was just writing the unittests, thanks paul. Shall I continue? I don't see any test case on tip. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue14364 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17795] backwards-incompatible change in SysLogHandler with unix domain sockets
New submission from Mike Lundy: The changed merged from http://bugs.python.org/issue16168 causes a regression in SysLogHandler behavior. The socktype of /dev/log is dependent on syslog configuration, and the fallback behavior (trying SOCK_DGRAM and then SOCK_STREAM if the former failed) was very useful. A better fix for this would preserve the fallback behavior in cases where the caller has not specifically requested a socktype. I've attached a patch with one such approach. -- components: Library (Lib) files: 0001-Restore-SysLogHandler-fallback-for-AF_UNIX-sockets.patch keywords: patch messages: 187347 nosy: Mike.Lundy priority: normal severity: normal status: open title: backwards-incompatible change in SysLogHandler with unix domain sockets type: behavior versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4 Added file: http://bugs.python.org/file29937/0001-Restore-SysLogHandler-fallback-for-AF_UNIX-sockets.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17795 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17796] No mimetype guessed for tar.xz url
New submission from LCID Fire: mimetypes.guess_type( http://ftp.gnome.org/pub/GNOME/sources/libxml++/2.36/libxml++-2.36.0.tar.xz;), strict=False ) gives (None, None) -- components: Library (Lib) messages: 187348 nosy: lcid-fire priority: normal severity: normal status: open title: No mimetype guessed for tar.xz url type: behavior versions: Python 2.7 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17796 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue13922] argparse handling multiple -- in args improperly
Changes by Michele Orrù maker...@gmail.com: -- nosy: +maker ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue13922 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue14364] Argparse incorrectly handles '--'
Michele Orrù added the comment: Yes, http://bugs.python.org/file29845/dbldash.patch seems to fix this. Attaching the unittests, and noisying on your issue. -- keywords: +patch Added file: http://bugs.python.org/file29938/issue14364.test.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue14364 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17468] Generator memory leak
Changes by Antoine Pitrou pit...@free.fr: -- nosy: +benjamin.peterson, ncoghlan ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17468 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue5004] socket.getfqdn() doesn't cope properly with purely DNS-based setups
Stijn Hoop added the comment: So after a good nights sleep: does it not make sense to use the canonical hostname iff the name argument is not present / empty? Otherwise, fall back to the documented steps? That way extra API is avoided, and I can't think of a case where you would rather have my weird results vs the output of hostname -f. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue5004 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17778] Fix test discovery for test_multiprocessing.py
Changes by Richard Oudkerk shibt...@gmail.com: -- nosy: +sbt ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17778 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17795] backwards-incompatible change in SysLogHandler with unix domain sockets
Changes by Vinay Sajip vinay_sa...@yahoo.co.uk: -- assignee: - vinay.sajip nosy: +vinay.sajip ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17795 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17797] Visual C++ 11.0 reports fileno(stdin) == 0 for non-console program
New submission from Mateusz Loskot:
In pythonrun.c, there is function initstdio() with the following test:
static int
initstdio(void)
{
...
/* Set sys.stdin */
fd = fileno(stdin);
/* Under some conditions stdin, stdout and stderr may not be connected
* and fileno() may point to an invalid file descriptor. For example
* GUI apps don't have valid standard streams by default.
*/
if (fd 0) {
#ifdef MS_WINDOWS
std = Py_None;
Py_INCREF(std);
#else
goto error;
#endif
}
else {
...
}
This function is fails for non-console applications (i.e. MFC) built using
Visual C++ 11.0 (Visual Studio 2012), becasue **strangely**, fileno(stdin) ==
0, so this test results in false and Python initialisation routines attempt to
setup streams.
Apparently, fileno(stdin) return value has changed between Visual C++ 10.0 (VS
2010)
and 11.0. The VC++ 10.0 reports fileno(stdin) == -2.
--
components: IO, Interpreter Core
messages: 187351
nosy: mloskot
priority: normal
severity: normal
status: open
title: Visual C++ 11.0 reports fileno(stdin) == 0 for non-console program
versions: Python 3.2
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[issue17797] Visual C++ 11.0 reports fileno(stdin) == 0 for non-console program
Amaury Forgeot d'Arc added the comment: And does it cause an issue later? How? -- nosy: +amaury.forgeotdarc ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17797 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17797] Visual C++ 11.0 reports fileno(stdin) == 0 for non-console program
Mateusz Loskot added the comment:
Yes, it does. In file Modulfileio.c, in function fileio_init, there is this
code:
if (fd = 0) {
if (check_fd(fd))
goto error;
self-fd = fd;
self-closefd = closefd;
}
The check_fd tests:
if (!_PyVerify_fd(fd) || (fstat(fd, buf) 0 errno == EBADF)) {
The _PyVerify_fd(fd) == 1, but errno is Bad file descriptor.
This eventually leads to Py_InitializeEx failure at:
if (initstdio() 0)
Py_FatalError(
Py_Initialize: can't initialize sys standard streams);
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[issue17468] Generator memory leak
Benjamin Peterson added the comment: Generators exit using GeneratorExit, which you could possible catch. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17468 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue5004] socket.getfqdn() doesn't cope properly with purely DNS-based setups
R. David Murray added the comment: That is an interesting proposal, yes. I suppose someone that needs the getaddrinfo semantics for something other than the local host can just call it directly. Now, do we add the fact that we are doing this to the current alogarithmic documention? :) -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue5004 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17797] Visual C++ 11.0 reports fileno(stdin) == 0 for non-console program
Mateusz Loskot added the comment: In file Modulfileio.c, I messed the path and filename above I meant: In file Modules/_io/fileio.c, -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17797 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17796] No mimetype guessed for tar.xz url
R. David Murray added the comment: Adding xz was treated as an enhancement in issue 16316. Our thinking about applying these types of changes as bug fixes has evolved a bit, so I think we can consider backporting it. -- nosy: +r.david.murray ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17796 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17797] Visual C++ 11.0 reports fileno(stdin) == 0 for non-console program
Amaury Forgeot d'Arc added the comment: Maybe check_fd(fd) could be used in initstdio as well. Can you check whether it's the same for the other files? What are the values for fileno(stdout) and fileno(stderr)? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17797 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17468] Generator memory leak
Anssi Kääriäinen added the comment: True, except GeneratorExit will run at garbage collection time and this will result in reference cycle problems. Checking if there is no except GeneratorExit clause might be too complicated. I still think this is worth a brief note in the gc docs. The gc docs talk only about __del__ methods, and there isn't one defined for the example generator. The generator does have something technically equivalent, but I don't spot any actual __del__ methods in the reference loop. A docs mention will not help much in avoiding this problem, but it will at least make the code behaviour equivalent to documentation. A mention in the gc docs would have helped me when trying to debug the leak in Django. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17468 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17468] Generator memory leak
Benjamin Peterson added the comment: A documentation patch sounds good to me. -- assignee: - docs@python components: +Documentation nosy: +docs@python type: resource usage - behavior ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17468 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17177] Document/deprecate imp
Brett Cannon added the comment: The deprecation warnings for the explicitly deprecated functions already have the instructions on how to port. A note could probably be added to turn on deprecation warnings if one needs help with moving code over. But the deprecation isn't even officially full-on yet. While it's documented as such, not all functionality has moved over to importlib, only bits and pieces. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17177 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17797] Visual C++ 11.0 reports fileno(stdin) == 0 for non-console program
Mateusz Loskot added the comment: Replacing if the current test in Python 3.2 if (fd 0) with if (check_fd(fd) 0) Seems to be a working solution. I just noticed, that in current Python/pythonrun.c in the repo, there the fd 0 tests have been replaced with new function is_valid_fd(). But, its semantic is equivalent to fd 0, so it does not check anything really. Perhaps is_valid_fd could be redefined as check_fd. Here are Visual C++ 11.0 (1700) vs 10.0 differences of fileno return value for all the standard streams int fdi, fdo, fde; fdi = fileno(stdin); fdo = fileno(stdout); fde = fileno(stderr); #if _MSC_VER 1700 assert(fdi == -2); assert(fdo == -2); assert(fde == -2); #else assert(fdi == 0); assert(fdo == 1); assert(fde == 2); #endif By the way, I assume such sudden change in fileno(std*) behaviour between Visual C++ versions is suspicious, so I also submitted bug report to Visual Studio: https://connect.microsoft.com/VisualStudio/feedback/details/785119/ -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17797 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17732] distutils.cfg Can Break venv
Nick Sloan added the comment: Responded to comments with an updated patch. Thanks for all the feedback, and sorry for the silly mistakes. Should have read up more thoroughly on the docs style guide and the terminology. Hopefully the latest patch is ready to go (or at least, nearly so). -- Added file: http://bugs.python.org/file29939/distutilsvenv.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17732 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17177] Document/deprecate imp
R. David Murray added the comment: Should we back out that module level deprecation notice for the moment, then? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17177 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3778] python uninstaller leave registry entries
anatoly techtonik added the comment: What is the reason for not following the good practice? Is it so hard to fix? -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue3778 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3778] python uninstaller leave registry entries
Changes by Michael Foord mich...@voidspace.org.uk: -- nosy: -michael.foord ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue3778 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue3778] python uninstaller leave registry entries
Changes by Brian Curtin br...@python.org: -- nosy: -brian.curtin ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue3778 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17177] Document/deprecate imp
Brett Cannon added the comment: Nah, consider it motivation for me to get it done in Python 3.4 else I have to back it out before release. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17177 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17468] Generator memory leak
Nick Coghlan added the comment: Adding Guido because this appears to be due to a longstanding difference between the handling of tp_del and most other slots Specifically, the reason for the odd behaviour appears to be that generator objects define tp_del [1] (which is what the cyclic gc *really* looks for), but while defining __del__ in Python will populate tp_del in the type slots, defining tp_del directly in a builtin or extension type doesn't create an exposed __del__ at the Python level (there's no wrapper function identified in the slot definition). So, at the very least, the fact that builtin and extension types can define tp_del without creating a visible __del__ method needs to be documented as a CPython implementation detail. However, I'm not sure we actually have a good *reason* for tp_del failing to generate __del__ automatically - it's been that way since Guido implemented it [2], but Guido's comment in that commit message about not needing a wrapper because types written in C can't define tp_del is clearly no longer accurate. [1] http://hg.python.org/cpython/file/2.7/Objects/genobject.c#l328 [2] http://hg.python.org/cpython/annotate/71dca7c76fa2/Objects/typeobject.c#3955 -- nosy: +gvanrossum versions: +Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17468 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17764] Support http.server passing bind address via commend line argument
Berker Peksag added the comment: I left comments on Rietveld. The patch also needs a documentation update. -- nosy: +berker.peksag stage: - patch review ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17764 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17468] Generator memory leak
Antoine Pitrou added the comment: With the advent of yield-based asynchronous programming, it is going to be problematic if a generator caught in a reference cycle can create a memory leak. -- nosy: +pitrou ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17468 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17796] No mimetype guessed for tar.xz url
Éric Araujo added the comment: +1 -- nosy: +eric.araujo stage: - needs patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17796 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17796] No mimetype guessed for tar.xz url
Éric Araujo added the comment: Let’s keep using that other bug report. -- resolution: - duplicate stage: needs patch - committed/rejected status: open - closed superseder: - Support xz compression in mimetypes module ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17796 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17468] Generator memory leak
Benjamin Peterson added the comment: I think the creation of __del__ wrappers for extension types is separate from this issue of generator finalization. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17468 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16316] Support xz compression in mimetypes module
Éric Araujo added the comment: Small changes in registries (mimetypes, html.entities, sometimes webbrowser) are acceptable in stable branches. Can you backport this? -- stage: committed/rejected - commit review status: closed - open ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue16316 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17468] Generator memory leak
Benjamin Peterson added the comment: Yes. Hopefully, the async framework using generators can properly can close() on them, though. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17468 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17468] Generator memory leak
Antoine Pitrou added the comment: Yes. Hopefully, the async framework using generators can properly can close() on them, though. With yield from-based generators, you don't need a trampoline anymore, so the close() call is now left to the application developers (if I'm not mistaken). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17468 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7951] Should str.format allow negative indexes when used for __getitem__ access?
Changes by Todd Rovito rovit...@gmail.com: -- nosy: +Todd.Rovito ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7951 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue17732] distutils.cfg Can Break venv
Nick Sloan added the comment: Here is another update. It has come to my attention that I missed some options: prefix, exec-prefix, home, user and root These have been added, and the docs and test have been updated to reflect the change. -- Added file: http://bugs.python.org/file29940/distutilsvenv.patch ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue17732 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
