[issue29657] os.symlink: FileExistsError shows wrong message
New submission from Wolfgang Rohdewald: execute the attached script. It should return FileExistsError: [Errno 17] File exists: 'a_link' -> 'a' but it returns FileExistsError: [Errno 17] File exists: 'a' -> 'a_link' -- components: Library (Lib) files: x.py messages: 288591 nosy: wrohdewald priority: normal severity: normal status: open title: os.symlink: FileExistsError shows wrong message versions: Python 3.5 Added file: http://bugs.python.org/file46671/x.py ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29657> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue29551] unittest: TestSuite.debug() does not like subTest()
New submission from Wolfgang Rohdewald: the main code is appended in main.py if a test uses with self.subTest(), subTest() fails right in its first statement "if not self._outcome ..." because _outcome is None. In main.py, the commented runner.run(suite) would work correctly. If this is not meant to work, please mention it in the documentation and improve unittest's reaction. what I would find more logical from the users's point of view is something like runner.debug(suite) -- components: Library (Lib) files: main.py messages: 287738 nosy: wrohdewald priority: normal severity: normal status: open title: unittest: TestSuite.debug() does not like subTest() type: crash versions: Python 3.5 Added file: http://bugs.python.org/file46637/main.py ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29551> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue27742] Random.randint generates different values in Python2 and Python3
Wolfgang Rohdewald added the comment: @SilentGhost: Sorry, I did not see the latest messages, I was referring to msg272511 Having to re-implement everything but rnd.random is not very user friendly. I will do that now for my project. -- ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue27742> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue27742] Random.seed(5, version=1) generates different values in PYthon2 and Python3
Wolfgang Rohdewald added the comment: There seems to be more to it, _randbelow already returns different values. And _randbelow is used by other user helpers like randrange, choice, select, shuffle, sample -- ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue27742> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue27742] Random.seed(5, version=1) generates different values in PYthon2 and Python3
New submission from Wolfgang Rohdewald: The documentation promises backwards compatible seeders. I understand this as such that they generate the same random sequences. But for Python 2.7.12 and 3.5.2 this is not so, even if I pass an integer as seed value. The attached script returns different values. Maybe I misunderstand the documentation - I believe it means that seed(version=1) uses the backwards compatible seeder, but it does not say so explicitly. If that is not so, the documentation does not say how to invoke the backwards compatible seeder. -- components: Library (Lib) files: r.py messages: 272506 nosy: wrohdewald priority: normal severity: normal status: open title: Random.seed(5, version=1) generates different values in PYthon2 and Python3 versions: Python 2.7, Python 3.5 Added file: http://bugs.python.org/file44082/r.py ___ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue27742> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22746] cgitb html: wrong encoding for utf-8
Wolfgang Rohdewald added the comment: What about open(..., encoding='latin-1', errors='xmlcharrefreplace') That works fine. I tested with a chinese character 与 But I do not think the application should work around something that cgitb is supposed to handle. More so since the documentation is dead silent about this. You need to use codecs.open instead of open and add those kw arguments. As long as this is not explained in the documentation, I guess it is a bug for everyone not using latin-1. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22746 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22746] cgitb html: wrong encoding for utf-8
Wolfgang Rohdewald added the comment: correction: A bug for everyone using non-ascii characters. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22746 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22746] cgitb html: wrong encoding for utf-8
Wolfgang Rohdewald added the comment: You need to use codecs.open instead of open No, why? in python3 open() supports the errors handler. right, but not in python2 which has the same problem. I need my code to run with both. Do you have a use case for xmlcharrefreplace in the HTML context? No, my only use case is the local file. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22746 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22745] cgitb with Py3: TypeError: 'str' does not support the buffer interface
New submission from Wolfgang Rohdewald: The attached script works with Python2.7. With Python3.4, it produces Traceback (most recent call last): File /usr/lib/python3.4/cgitb.py, line 268, in __call__ self.handle((etype, evalue, etb)) File cgibug.py, line 12, in handle cgitb.Hook.handle(self, info) File /usr/lib/python3.4/cgitb.py, line 273, in handle self.file.write(reset()) TypeError: 'str' does not support the buffer interface When replacing the file mode 'wb' with 'w', it produces this failure: File /usr/lib/python3.4/cgitb.py, line 288, in handle self.file.write(doc + '\n') TypeError: can't concat bytes to str The script works as expected with Python2.7 with both file modes. -- components: Library (Lib) files: cgibug.py messages: 230083 nosy: wrohdewald priority: normal severity: normal status: open title: cgitb with Py3: TypeError: 'str' does not support the buffer interface type: crash versions: Python 3.4 Added file: http://bugs.python.org/file37043/cgibug.py ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22745 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22746] cgitb html: wrong encoding for utf-8
New submission from Wolfgang Rohdewald: The attached script shows the non-ascii characters wrong wherever they occur, including the exception message and the comment in the source code. Looking at the produced .html, I can say that cgitb simply passes the single byte utf-8 codes without encoding them as needed. Same happens with Python3.4 (after applying some quick and dirty changes to cgitb.py, see bug #22745). -- components: Library (Lib) files: cgibug.py messages: 230085 nosy: wrohdewald priority: normal severity: normal status: open title: cgitb html: wrong encoding for utf-8 type: behavior versions: Python 2.7 Added file: http://bugs.python.org/file37044/cgibug.py ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22746 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22746] cgitb html: wrong encoding for utf-8
Wolfgang Rohdewald added the comment:
If you cannot offer a solution for arbitrary unicode, you have no solution at
all. Afer all, that is what unicode is about: support ALL languages, not only
your own.
I do not quite understand why you think this is not a bug.
If cgitb encodes unicode like x e 4 ; (remove spaces), the browser does not
have to guess the encoding, it will always show the correct character. This
works for all of unicode. See
https://en.wikipedia.org/wiki/Unicode_and_HTML#Numeric_character_references
So this bug is fixable, I am reopening it.
For Python3, the fix is actually very simple: Do not write doc but
str(doc.encode('ascii', 'xmlcharrefreplace')), like in the attached patch. This
patch works for me but there might be yet uncovered code paths. And my source
file is encoded in utf-8, other source file encodings should be tested too. I
do not know if cgitb correctly honors the source file header like # -*- coding:
utf-8 -*-
Fixing this for Python2 is certainly doable too but perhaps more difficult
because a Python2 str() may have an unknown encoding.
--
keywords: +patch
resolution: not a bug -
status: closed - open
Added file: http://bugs.python.org/file37047/22746.patch
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[issue22746] cgitb html: wrong encoding for utf-8
Changes by Wolfgang Rohdewald wolfg...@rohdewald.de: -- resolution: - remind ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22746 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue22745] cgitb with Py3: TypeError: 'str' does not support the buffer interface
Wolfgang Rohdewald added the comment: This now works with mode 'w' and after reinstalling the packages. My Python is 3.4.0 (ubuntu). -- resolution: - not a bug status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue22745 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
QVariant.toPyObject()
toPyObject() is mentioned but undocumented at http://www.riverbankcomputing.com/static/Docs/PyQt4/html/qvariant.html#toPyObject without it being documented, I find it a bit surprising that toPyObject() can return a QString. Of course QString is a python object but then QVariant is too. -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: working with a large file
On Montag 12 September 2011, Rita wrote: I have a large file, 18gb uncompressed, and I would like to know what is the preferred method to read this file for random access. I have several processes reading the file which different calculate arguments. My server has 64gb of memory. Not sure what is the preferred way to do this? if the data is structured, you could store it in something like sqlite -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: strang thing:
On Dienstag 06 September 2011, 守株待兔 wrote: (date,open,high,low,close,vol,adjclose) = (row[0], row[1], row[2], row[3],row[4], row[5], row[6]) print row[0], row[1], row[2], row[3],row[4], row[5], row[6] the wrong output is : file = open(filename,'r') TypeError: 'str' object is not callable you reassigned open to be a string -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: removing nested iffs
On Freitag 29 Juli 2011, Josh Benner wrote: if args.build not None: which python version understands this? -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Fun and games with lambda
On Freitag 17 Juni 2011, Steven D'Aprano wrote: run this one- liner and wonder no more... looks like something dangerous to me. What does it do? rm -rf ? -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: scope of function parameters (take two)
On Dienstag 31 Mai 2011, Henry Olders wrote: You're partially right - what I want is a function that is free of side effects back through the parameters passed in the function call. I don't know any object oriented language where it is not possible to change objects passed in as parameters. It is up to the passed object (a list in your case) to allow or disallow manipulations no matter how they are invocated, and the object is the same in the calling code and in the called function. -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: scope of function parameters (take two)
On Dienstag 31 Mai 2011, Henry Olders wrote: What I would like is that the variables which are included in the function definition's parameter list, would be always treated as local to that function (and of course, accessible to nested functions) but NOT global unless explicitly defined as global. This would prevent the sort of problems that I encountered as described in my original post. the parameter is local but it points to an object from an outer scope - that could be the scope of the calling function or maybe the global scope. So if you change the value of this parameter, you change that object from outer scope. But the parameter itself is still local. If you do def fnc2(c): c = 5 the passed object will not be changed, c now points to another object. This is different from other languages where the global c would change (when passing c by reference) what you really seem to want is that a function by default cannot have any side effects (you have a side effect if a function changes things outside of its local scope). But that would be a very different language than python did you read the link Steven gave you? http://mail.python.org/pipermail/tutor/2010-December/080505.html -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: float(nan) in set or as key
On Sonntag 29 Mai 2011, Tim Delaney wrote: There's a second part the mystery - sets and dictionaries (and I think lists) assume that identify implies equality (hence the second result). This was recently discussed on python-dev, and the decision was to leave things as-is. On Sonntag 29 Mai 2011, Grant Edwards wrote: Even if they are the same nan, it's still not equal to itself. if I understand this thread correctly, they are not equal to itself as specified by IEEE but Python treats them equal in sets and dictionaries for performance reasons -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: scope of function parameters
On Sonntag 29 Mai 2011, Henry Olders wrote: It seems that in Python, a variable inside a function is global unless it's assigned. no, they are local I would have thought that a function parameter would automatically be considered local to the function. It doesn't make sense to me to pass a global to a function as a parameter. it is local. But consider what you actually passed: You did not pass a copy of the list but the list itself. You could also say you passed a reference to the list. All python variables only hold a pointer (the id) to an object. This object has a reference count and is automatically deleted when there are no more references to it. If you want a local copy of the list you can either do what you called being ugly or do just that within the function itself - which I think is cleaner and only required once. def fnc2(c): c = c[:] c[1] = 'having' return c -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: GIL in alternative implementations
On Samstag 28 Mai 2011, Marc Christiansen wrote: And I wouldn't rely on 3.2 not to break. it breaks too like it should, but only rarely like one out of 10 times i5:/pub/src/gitgames/kajongg/src$ python3.2 test.py 100 i5:/pub/src/gitgames/kajongg/src$ python3.2 test.py 100 i5:/pub/src/gitgames/kajongg/src$ python3.2 test.py 98 i5:/pub/src/gitgames/kajongg/src$ python3.2 test.py 100 -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Closing generators
On Freitag 22 April 2011, Terry Reedy wrote: for i in g: if i is not None: g.close() return i When returning from the function, g, if local, should disappear. yes - it disappears in the sense that it no longer accessible, but AFAIK python makes no guarantees as for when an object is destroyed - CPython counts references and destroys when no reference is left, but that is implementation specific -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: suggestions, comments on an is_subdict test
On Freitag 22 April 2011, Vlastimil Brom wrote: check whether all items of a given dictionary are present in a reference dictionary I would not call this is_subdict. That name does not clearly express that all keys need to have the same value. set(subdict.items()) = set(reference.items()) should be equivalent to your code if you only want to check for presence of all keys in the reference dict: set(subdict.keys()) = set(reference.keys()) -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Argument count mismatch
On Donnerstag 21 April 2011, RVince wrote: When I make the following call: http://localhost/eligibility/cmseditorlinemethod/474724434 broken link - I have no /eligilibity on my localhost -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: installing setuptools on Windows custom python install
On Montag 18 April 2011, Eric Frederich wrote: File F:\My_Python27\lib\socket.py, line 47, in module import _socket ImportError: No module named _socket F:\pyside\setuptools-0.6c11 I have C:\Python27 and within that, DLLS\_socket.pyd this is what import _socket should find do you have that? -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
[issue11717] conflicting definition of ssize_t in pyconfig.h
Wolfgang Rohdewald wolfg...@rohdewald.de added the comment: types.h is from kdewin/include/msvc/sys git clone git://anongit.kde.org/kdewin types.h uses SSIZE_T but that is nowhere defined in KDE, so it must be the original one from msvc -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue11717 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11717] conflicting definition of ssize_t in pyconfig.h
Changes by Wolfgang Rohdewald wolfg...@rohdewald.de: -- nosy: +mhammond ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue11717 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue11717] conflicting definition of ssize_t in pyconfig.h
New submission from Wolfgang Rohdewald wolfg...@rohdewald.de: compiling pykde on windows with msvc2010 on a 32bit Windows 7: sipdnssdpart0.cpp R:\include\msvc\sys/types.h(52) : error C2371: 'ssize_t' : redefinition; different basic types c:\python27\include\pyconfig.h(201) : see declaration of 'ssize_t' I can fix this by defining ssize_t as long in pyconfig.h or as int in kdewin/include/msvc/sys/types.h the original files from windows define SSIZE_T as long so to me this seems like a bug in pyconfig.h, it should say typedef _W64 long ssize_t Python27\include\pyconfig.h says (same in Python32): #ifdef MS_WIN64 typedef __int64 ssize_t; #else typedef _W64 int ssize_t; #endif while kdewin/include/msvc/sys/types.h says: typedef SSIZE_T ssize_t; SSIZE_T is defined in Microsoft SDKs/Windows/v7.0A/Include/BaseTsd.h: typedef LONG_PTR SSIZE_T, *PSSIZE_T; and LONG_PTR from same directory, intsafe.h: #if (__midl 501) typedef [public] __int3264 LONG_PTR; #else #ifdef _WIN64 typedef __int64 LONG_PTR; #else typedef _W64 long LONG_PTR; #endif // WIN64 #endif // (__midl 501) for __midl see http://msdn.microsoft.com/en-us/library/aa367301(v=vs.85).aspx -- components: Windows messages: 132558 nosy: wrohdewald priority: normal severity: normal status: open title: conflicting definition of ssize_t in pyconfig.h type: compile error versions: Python 2.7 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue11717 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
Re: value of pi and 22/7
On Donnerstag 17 März 2011, kracekumar ramaraju wrote: 22/7.0 3.1428571428571428 import math math.pi 3.1415926535897931 Why is the difference is so much ?is pi =22/7 or something ? https://secure.wikimedia.org/wikipedia/en/wiki/Pi -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: getpass and IDEs
On Freitag 25 Februar 2011, Andrew wrote: I find that calling getpass produces a warning noting that it can't suppress output, if I'm using idle, wingide, or a few others. If I'm running from the console it works fine, but then I can't make use of ide-integrated debugging. I know I could just set up a test account for development purposes if I'm concerned about shoulder surfers, and that's probably a good idea anyway. But I'm curious what's different about IDE environments that makes it impossible to suppress output on them, and if there's anything that might be done about this. I'd say your IDE redirects stdout/stderr so it can show output within the IDE http://docs.python.org/library/getpass.html reading python docs lets me believe you are using python pre 2.6 if so, you could try to open a stream to /dev/tty and pass that to getpass.getpass() -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: How can I tell if I am inside a context manager?
On Dienstag 01 Februar 2011, Gerald Britton wrote: I'd like to know how (perhaps with the inspect module) I can tell if I am running in a context manager. class f(object): def __init__(self): self.inContext = False def __enter__(self): self.inContext = True return self def __exit__(self,a,b,c): self.inContext = False return None x = f() print 'not within:', x.inContext with f() as h: print 'within:', h.inContext -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: PJL
On Montag 10 Januar 2011, loial wrote: First question...how do I send it to the printer? Printer would be on the network. echo PJL | lp -oraw -dnetworkprinter if it works, translate it to python -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: decouple copy of a list
On Freitag 10 Dezember 2010, Dirk Nachbar wrote: I want to take a copy of a list a b=a and then do things with b which don't affect a. How can I do this? Dirk b=a[:] -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: decouple copy of a list
On Freitag 10 Dezember 2010, Dirk Nachbar wrote: b=a[:] -- Wolfgang I did that but then some things I do with b happen to a as well. as others said, this is no deep copy. So if you do something to an element in b, and if the same element is in a, both are changed as they are still the same objects: x,y=5,6 a=[x,y] b=a[:] id(a),id(b) (140695481867368, 140695481867512) id(a[0]),id(b[0]) (33530584, 33530584) a=b id(a),id(b) (140695481867512, 140695481867512) -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Ensuring symmetry in difflib.SequenceMatcher
On Mittwoch 24 November 2010, John Yeung wrote:
Are there any
simple adjustments that can be made without sacrificing (too
much) performance?
difflib.SequenceMatcher(None,*sorted(('BYRD','BRADY'))).ratio()
0.3
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Re: SQLite3 and lastrowid
On Freitag 19 November 2010, Alexander Gattin wrote: It's better to select count(1) instead of count(*). The latter may skip rows consisting entirely of NULLs IIRC. in some data bases count(1) is said to be faster than count(*), I believe -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: How can I catch segmentation fault in python?
On Mittwoch 17 November 2010, justin wrote: But the problem is that the code is not mine, and it takes over a day for me to get the point where the segmentation fault occurred. Plus, it seems that the point is not deterministic Still, I think I should at least try to figure out exactly at which point the segmentation fault occurs, and think where to go from there according to your kind advice. try valgrind -- mit freundlichen Grüssen with my best greetings Wolfgang Rohdewald dipl. Informatik Ing. ETH Rohdewald Systemberatung Karauschenstieg 4 D 21640 Horneburg Tel.: 04163 826 819 Fax: 04163 826 828 Internet: http://www.rohdewald.de -- http://mail.python.org/mailman/listinfo/python-list
Re: How can I catch segmentation fault in python?
On Mittwoch 17 November 2010, Wolfgang Rohdewald wrote: On Mittwoch 17 November 2010, justin wrote: But the problem is that the code is not mine, and it takes over a day for me to get the point where the segmentation fault occurred. Plus, it seems that the point is not deterministic Still, I think I should at least try to figure out exactly at which point the segmentation fault occurs, and think where to go from there according to your kind advice. try valgrind hit the send button too fast... even if the segmentation fault only happens after a long time valgrind might find problems much sooner, and fixing them might remove the segmentation fault. -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: [Python-ideas] [Python-Dev] Inclusive Range
On Dienstag 05 Oktober 2010, MRAB wrote: About notation, even if loved right-hand-half-open intervals, I would wonder about [a,b] noting it. I guess 99.9% of programmers and novices (even purely amateur) have learnt about intervals at school in math courses. Both notations I know of use [a,b] for closed intervals, while half-open ones are noted either [a,b[ or [a,b). Thus, for me, the present C/python/etc notation is at best misleading. So, what about a hypothetical language using directly math unambiguous notation, thus also letting programmers chose their preferred semantics (without fooling others)? End of war? Dijkstra came to his conclusion after seeing the results of students using the programming language Mesa, which does support all 4 forms of interval. what was his conclusion? -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: inspect.stack() or inspect.currentframe() gives list index out of range error
On Samstag 25 September 2010, Steven D'Aprano wrote: My guess is that you've copied the .pyc file onto the server, BUT there is also an older version of the .py file there as well. Because the modification date is older than that of the .pyc file, Python executes the compiled code from the .pyc file. that would be horrible - this is what our own legacy software does. A maintenance nightmare. Think adjusting system time or cp -a spam.py Actually the docs say something different: The modification time of the version of spam.py used to create spam.pyc is recorded in spam.pyc, and the .pyc file is ignored if these don’t match. found here: http://docs.python.org/tutorial/modules.html -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: feature request: string.contains('...')
On Freitag 24 September 2010, Wim Feijen wrote:
would really like having a string.contains('...') function
which returns either True or False. I know I can mimick this
behaviour by saying string.find('...') != -1 , however, I
find this harder to read.
a = 'xy134'
'13' in a
True
'15' in a
False
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Re: Line-by-line processing when stdin is not a tty
On Mittwoch 11 August 2010, Cameron Simpson wrote: Usually you either need an option on the upstream program to tell it to line buffer explicitly once cat had an option -u doing exactly that but nowadays -u seems to be ignored http://www.opengroup.org/onlinepubs/009695399/utilities/cat.html -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: subprocess escaping POpen?!
On Donnerstag 05 August 2010, Chris Withers wrote: ...then the output is indeed captured. So, what is svn doing differently? How is it escaping its jail? maybe it does not read from stdin but directly from /dev/tty -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: subprocess escaping POpen?!
On Donnerstag 05 August 2010, Chris Withers wrote: But why only the request for auth credentials? for security reasons I suppose - make sure a human enters the password -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: where are the program that are written in python?
On Freitag 21 Mai 2010, Jake b wrote: I don't know of any big game written in python. ( meaning python code, using c++ libs would you call 8702 python statements big? If so, Kajongg would be a candidate. -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Cross-platform file paths
On Sonntag 09 Mai 2010, Tim Roberts wrote: No. On Linux, you need to mount the share in some empty directory (using mount or smbmount), then read the files from that directory. actually the mount directory does not have to be empty - whatever it contains is invisible while someting is mounted in it. But of course using an empty directory gets you less surprises. -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Symbols as parameters?
On Friday 22 January 2010, Alf P. Steinbach wrote: I get the impression that there's some message traffic that I don't see For example, the recent thread Covert number into string started with a reply in my newreader, using EternalSeptember's NNTP host. It also starts with a reply in Google's archives, url: http://groups.google.com/group/comp.lang.python/browse_thread/threa d/b8097d4de4a9c9b0/cb3a2e6ccd7736ef. did you check your spam folder? I got the original. If you want to, I can mail you the headers privately -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: basic Class in Python
On Monday 18 January 2010, BarryJOgorman wrote: TypeError: object._new_() takes no parameters def _init_(self, name, job=None, pay=0): __init__ needs two underscores left and right -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: python simply not scaleable enough for google?
On Wednesday 18 November 2009, Terry Reedy wrote: Python today is at least 100x as fast as 1.4 (my first version) was in its time. Which is to say, Python today is as fast as C was then on the same hardware? That must have been a very buggy C compiler. Or was it a C interpreter? -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: regex (?!..) problem
On Monday 05 October 2009, Carl Banks wrote: What you're not realizing is that if a regexp search comes to a dead end, it won't simply return no match. Instead it'll throw away part of the match, and backtrack to a previously-matched variable-length subexpression, such as .*?, and try again with a different length. well, that explains it. This is contrary to what the documentation says, though. Should I fill a bug report? http://docs.python.org/library/re.html Now back to my original problem: Would you have any idea how to solve it? count() is no solution in my case, I need re.search to either return None or a match. -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: regex (?!..) problem
On Monday 05 October 2009, Stefan Behnel wrote: Wolfgang Rohdewald wrote: I want to match a string only if a word (C1 in this example) appears at most once in it. def match(s): if s.count(C1) 1: return None return s If this doesn't fit your requirements, you may want to provide some more details. Well - the details are simple and already given: I need re.search to either return None or a match. But I will try to state it differently: I have a string representing the results for a player of a board game (Mah Jongg - not the solitaire but the real one, played by 4 players), and I have a list of scoring rules. Those rules can be modified by the user, he can also add new rules. Mah Jongg is played with very different rulesets worldwide. The rules are written as regular expressions. Since what they do varies greatly I do not want do treat some of them in a special way. That would theoretically be possible but it would really complificate things. For each rule I simply need to check whether it applies or not. I do that by calling re.search(rule, gamestring) and by checking the result against None. Here you can look at all rules I currently have. http://websvn.kde.org/trunk/playground/games/kmj/src/predefined.py?view=markup The rule I want to rewrite is called Robbing the Kong. Of course it is more complicated than my example with C1. Here you can find the documentation for the gamestring: http://websvn.kde.org/trunk/playground/games/doc/kmj/index.docbook?revision=1030476view=markup (get HTML files with meinproc index.docbook) -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: regex (?!..) problem
On Monday 05 October 2009, MRAB wrote:
(?!.*?(C1).*?\1) will succeed only if .*?(C1).*?\1 has failed,
in which case the group (group 1) will be undefined (no capture).
I see.
I should have moved the (C1) out of this expression anyway:
re.match(r'L(?Ptile..)(?!.*?(?P=tile).*?(?P=tile))(.*?
(?P=tile))','LC1 C1B1B1B1 b3b3b3b3 C2C2C3').groups()
('C1', ' C1')
this solves my problem, thank you!
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regex (?!..) problem
Hi,
I want to match a string only if a word (C1 in this example) appears
at most once in it. This is what I tried:
re.match(r'(.*?C1)((?!.*C1))','C1b1b1b1 b3b3b3b3 C1C2C3').groups()
('C1b1b1b1 b3b3b3b3 C1', '')
re.match(r'(.*?C1)','C1b1b1b1 b3b3b3b3 C1C2C3').groups()
('C1',)
but this should not have matched. Why is the .*? behaving greedy
if followed by (?!.*C1)? I would have expected that re first
evaluates (.*?C1) before proceeding at all.
I also tried:
re.search(r'(.*?C1(?!.*C1))','C1b1b1b1 b3b3b3b3
C1C2C3C4').groups()
('C1b1b1b1 b3b3b3b3 C1',)
with the same problem.
How could this be done?
--
Wolfgang
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Re: Creating a local variable scope.
On Friday 18 September 2009, Ethan Furman wrote: loop != scope true for python but in some languages the loop counter has a scope limited to the loop -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: How to print without spaces?
On Friday 18 September 2009, koranthala wrote: What if I want to print 1 to 100 in a loop without spaces in between? I think that is the OPs question. arr = ['a', 'b', 'c', 'andsoon'] print ''.join(arr) -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: VT100 in Python
On Sunday 13 September 2009, Nadav Chernin wrote: I'm writing program that read data from some instrument trough RS232. This instrument send data in VT100 format. I need only to extract the text without all other characters that describe how to represent data on the screen. Is there some library in python for converting VT100 strings? that should be easy using regular expressions -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: using expy to extend python
On Thursday 06 August 2009, Yingjie Lan wrote: For more information about expy, please visit its homepage at: http://expy.sf.net/ looks very interesting, bookmarked. In your example class mate, def rename looks wrong: if malloc fails, the previous name should probably not be replaced by an empty string? -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: New implementation of re module
On Tuesday 28 July 2009, Christopher Arndt wrote:
setup(name='regex',
version='1.0',
py_modules = ['regex'],
ext_modules=[Extension('_regex', ['_regex.c'])],
)
Also, you need to copy unicodedata_db.h from the Modules
directory of the Python source tree to your working directory,
since this file apparently is not installed into the include
directory of a Python installation.
using issue2636-20090729.zip
I have Python 2.6.2 on ubuntu 9.04
with ggc-4.3:
gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -
Wstrict-prototypes -fPIC -I/usr/include/python2.6 -c _regex.c -o
build/temp.linux-i686-2.6/_regex.o
_regex.c: In Funktion »bmatch_context«:
_regex.c:1462: Fehler: Als Erhöhungsoperand wird L-Wert erfordert
_regex.c:1470: Fehler: Als Erhöhungsoperand wird L-Wert erfordert
_regex.c:1478: Fehler: Als Verringerungsoperand wird L-Wert erfordert
with gcc-4.4:
gcc-4.4 -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-
prototypes -fPIC -I/usr/include/python2.6 -c _regex.c -o
build/temp.linux-i686-2.6/_regex.o
_regex.c: In function ‘bmatch_context’:
_regex.c:1462: error: lvalue required as increment operand
_regex.c:1470: error: lvalue required as increment operand
_regex.c:1478: error: lvalue required as decrement operand
--
Wolfgang
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Re: New implementation of re module
On Thursday 30 July 2009, MRAB wrote: There are other lines which are similar, eg line 1487. Do they all give the same/similar error with your compiler? yes. The full output with gcc-4.3: notebook:~/kmj/src$ LANG=C python setup.py build running build running build_py running build_ext building '_regex' extension gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall - Wstrict-prototypes -fPIC -I/usr/include/python2.6 -c _regex.c -o build/temp.linux-i686-2.6/_regex.o _regex.c: In function 'bmatch_context': _regex.c:1462: error: lvalue required as increment operand _regex.c:1470: error: lvalue required as increment operand _regex.c:1478: error: lvalue required as decrement operand _regex.c:1487: error: lvalue required as decrement operand _regex.c:1593: error: lvalue required as increment operand _regex.c:1606: error: lvalue required as decrement operand _regex.c:1616: error: lvalue required as increment operand _regex.c:1625: error: lvalue required as increment operand _regex.c:1634: error: lvalue required as decrement operand _regex.c:1643: error: lvalue required as decrement operand _regex.c:2036: error: lvalue required as increment operand _regex.c:2047: error: lvalue required as increment operand _regex.c:2059: error: lvalue required as decrement operand _regex.c:2070: error: lvalue required as decrement operand _regex.c:2316: error: lvalue required as increment operand In file included from _regex.c:2431: _regex.c: In function 'umatch_context': _regex.c:1462: error: lvalue required as increment operand _regex.c:1470: error: lvalue required as increment operand _regex.c:1478: error: lvalue required as decrement operand _regex.c:1487: error: lvalue required as decrement operand _regex.c:1593: error: lvalue required as increment operand _regex.c:1606: error: lvalue required as decrement operand _regex.c:1616: error: lvalue required as increment operand _regex.c:1625: error: lvalue required as increment operand _regex.c:1634: error: lvalue required as decrement operand _regex.c:1643: error: lvalue required as decrement operand _regex.c:2036: error: lvalue required as increment operand _regex.c:2047: error: lvalue required as increment operand _regex.c:2059: error: lvalue required as decrement operand _regex.c:2070: error: lvalue required as decrement operand _regex.c:2316: error: lvalue required as increment operand error: command 'gcc' failed with exit status 1 -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: New implementation of re module
On Thursday 30 July 2009, MRAB wrote:
So it complains about:
++(RE_CHAR*)context-text_ptr
but not about:
++info-repeat.count
Does this mean that the gcc compiler thinks that the cast makes it
an rvalue? I'm using Visual C++ 2008 Express Edition, which doesn't
complain. What does the C standard say?
I am not really a C expert but I found some links. Most helpful:
http://developer.apple.com/DOCUMENTATION/DeveloperTools/gcc-4.0.1/gcc/C-Dialect-Options.html
(search -fnon-lvalue-assign)
so I did the conversion mentioned there. This works:
--- _regex.c2009-07-29 11:34:00.0 +0200
+++ n 2009-07-30 15:15:22.0 +0200
@@ -1459,7 +1459,7 @@
if (text_ptr (RE_CHAR*)context-slice_end text_ptr[0] != '\n')
{
context-node = node-next_1;
-++(RE_CHAR*)context-text_ptr;
+++*(RE_CHAR**)context-text_ptr;
} else
context = reject_context(state, context);
break;
--
Wolfgang
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Re: New implementation of re module
On Thursday 30 July 2009, Wolfgang Rohdewald wrote: so I did the conversion mentioned there. This works: I actually do not know if it works - but it compiles. -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: New implementation of re module
On Monday 27 July 2009, MRAB wrote: I've been working on a new implementation of the re module. The details are at http://bugs.python.org/issue2636, specifically from http://bugs.python.org/issue2636#msg90954. I've included a .pyd file for Python 2.6 on Windows if you want to try it out. how do I compile _regex.c on Linux? -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Detect target name in descriptor __set__ method
On Wednesday 22 July 2009, Gabriel Genellina wrote: x = X() x.foo = value del x.foo -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Detect target name in descriptor __set__ method
On Wednesday 22 July 2009, Wolfgang Rohdewald wrote: On Wednesday 22 July 2009, Gabriel Genellina wrote: x = X() x.foo = value del x.foo sorry, was not yet quite awaken - I read delete target name instead of detect target name -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Need to know if a file as only ASCII charaters
On Wednesday 17 June 2009, Lie Ryan wrote:
Wolfgang Rohdewald wrote:
On Wednesday, 17. June 2009, Steven D'Aprano wrote:
while text:
for c in text:
if c not in printable: return False
that is one loop per character.
unless printable is a set
that would still execute the line if c not in...
once for every single character, against just one
regex call. With bigger block sizes, the advantage
of regex should increase.
wouldn't it be faster to apply a regex to text?
something like
while text:
if re.search(r'\W',text): return False
regex? Don't even start...
Here comes a cProfile test. Note that the first variant of Steven
would always have stopped after the first char. After fixing that
making it look like variant 2 with block size=1, I now have
3 variants:
Variant 1 Blocksize 1
Variant 2 Blocksize 65536
Variant 3 Regex on Blocksize 65536
testing for a file with 400k bytes shows regex as a clear winner.
Doing the same for an 8k file: variant 2 takes 3ms, Regex takes 5ms.
Variants 2 and 3 take about the same time for a file with 20k.
python ascii.py | grep CPU
398202 function calls in 1.597 CPU seconds
13 function calls in 0.104 CPU seconds
1181 function calls in 0.012 CPU seconds
import re
import cProfile
from string import printable
def ascii_file1(name):
with open(name, 'rb') as f:
c = f.read(1)
while c:
if c not in printable: return False
c = f.read(1)
return True
def ascii_file2(name):
bs = 65536
with open(name, 'rb') as f:
text = f.read(bs)
while text:
for c in text:
if c not in printable: return False
text = f.read(bs)
return True
def ascii_file3(name):
bs = 65536
search = r'[^%s]' % re.escape(printable)
reco = re.compile(search)
with open(name, 'rb') as f:
text = f.read(bs)
while text:
if reco.search(text): return False
text = f.read(bs)
return True
def test(fun):
if fun('/tmp/x'):
print 'is ascii'
else:
print 'is not ascii'
cProfile.run(test(ascii_file1))
cProfile.run(test(ascii_file2))
cProfile.run(test(ascii_file3))
--
Wolfgang
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Re: Need to know if a file as only ASCII charaters
On Wednesday, 17. June 2009, Steven D'Aprano wrote: while text: for c in text: if c not in printable: return False that is one loop per character. wouldn't it be faster to apply a regex to text? something like while text: if re.search(r'\W',text): return False -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Is there a maximum size to a Python program?
On Montag, 27. April 2009, John Machin wrote: ἐδάκρυσεν ὁ Ἰησοῦς και εγώ +1 -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Display directory pyqt4 and Python
On Donnerstag, 2. April 2009, Dunwitch wrote:
for x in (fileList):
self.ui.displayVideo.setText(x) # This only shows the last
self.ui.displayVideo.setText('\n'.join(fileList))
but I would go for a solution with QDirModel / QListView
http://doc.trolltech.com/4.5/itemviews-dirview.html
--
Wolfgang
--
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Re: Rough draft: Proposed format specifier for a thousands separator
On Freitag, 13. März 2009, Raymond Hettinger wrote: [Paul Rubin] What if you want to change the separator? Europeans usually use periods instead of commas: one thousand = 1.000. That is supported also. do you support just a fixed set of separators or anything? how about this: (Switzerland) 12'000.99 or spacing: 12 000.99 -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Is python worth learning as a second language?
On Montag, 9. März 2009, r wrote:
Long answer:
'Ye%s' %'s'*1000
simplified long answer:
'Yes' * 1000
or did you mean
'Ye%s' %('s'*1000)
--
Wolfgang
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Re: Python, HTTPS (SSL), tlslite and metoda POST (and lots of pain)
On Montag, 23. Februar 2009, Steve Holden wrote: yat...@gmail.com wrote: Hi there. [...] Yatsek: You just hijacked a thread by writing your question as a reply to somebody else's post did he? His mail headers show no reference to any other mail AFAICS -- Wolfgang -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 vs 2.5 - Unicode error
On Mittwoch, 21. Januar 2009, Gaurav Veda wrote:
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc2 in position
4357: ordinal not in range(128)
Before sending the (insert) query to the mysql server, I do the
following which I think should've taken care of this problem:
sqlStr = sqlStr.replace('\\', '')
you might consider using what mysql offers about unicode: save
all strings encoded as unicode. Might be more work now but I think
it would be a good investment in the future.
have a look at the mysql documentation for
mysql_real_escape_string() takes care of quoted chars.
mysql_set_character_set() for setting the character set used
by the database connection
you can ensure that the web page is unicode by doing something
like
charsetregex = re.compile(r'charset=(.*?)[\]')
charsetmatch = charsetregex.search(page)
if charsetmatch:
charset=charsetmatch.group(1)
utf8Text = unicode(page,charset)
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Wolfgang
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