ANN: eGenix mxODBC 3.0 Developer Licenses (mxODBC Database Interface)
eGenix.com mxODBC 3.0 Developer Licenses Available eGenix is pleased to announce the immediate availability of developer licenses for our Python ODBC database interface, the eGenix mxODBC Distribution 3.0 for Python. This announcement is also available on our web-site for online reading: http://www.egenix.com/company/news/mxODBC-3.0-Developer-License-Announcement.html INTRODUCTION The eGenix mxODBC Distribution is an add-on distribution for our eGenix mx Base Distribution. It comes with mxODBC, our universal ODBC database interface for Python. DEVELOPER LICENSES FOR mxODBC 3.0 eGenix is now shipping developer licenses for mxODBC which allow the integration and redistribution of mxODBC into your products. * Make use of the power and flexibility of this cross-platform, robust and stable interface and connect to most available databases with less hassles, fewer configuration problems and great performance. * Enjoy the same database interface API on all supported platforms: Windows, Linux, Mac OS X, FreeBSD and Solaris. * This is true write-once, deploy anywhere ! HOW DOES IT WORK ? The setup works just like for a regular stand-alone installation of mxODBC. eGenix will send you the required license files after purchase and all you have to do, is install them in the product folder. You can then work on your product and ship the license files together with the product, so that your customers can use the product integrated mxODBC just like you do on your development machines. Once licensed, you don't have to pay eGenix royalties or fees for distributing mxODBC together with your products. WHICH RESTRICTIONS APPLY ? Restrictions are very modest: * you must get a proper license for all developer machines and developers working on the product * the mxODBC version included in the product must be tied to your product, ie. it should not be usable outside your product * you are not permitted to use mxODBC in a product that would introduce competition for eGenix products. The full legal details are available in the eGenix.com Commercial License Agreement 1.2.0. Please see the product page for details: http://www.egenix.com/products/python/mxODBC/#Licensing TRY BEFORE YOU BUY You can request 30-day evaluation licenses by writing to [EMAIL PROTECTED], stating your name (or the name of the company) and the number of eval licenses that you need. We will then issue you licenses and send them to you by email. Please make sure that you can receive ZIP file attachments on the email you specify in the request, since the license files are send out as ZIP attachements. PRICING mxODBC 3.0 Developer CPU Licenses can be purchased in our eGenix Online Shop at http://www.egenix.com/shop/. Please see the mxODBC distribution page for details on buying licenses or contact [EMAIL PROTECTED] DOWNLOADS The download archives and instructions for installing the package can be found at: http://www.egenix.com/products/python/mxODBC/ IMPORTANT: In order to use the eGenix mx Commercial package you will first need to install the eGenix mx Base package which can be downloaded from here: http://www.egenix.com/products/python/mxBase/ ___ SUPPORT Commercial support for these packages is available from eGenix.com. Please see http://www.egenix.com/services/support/ for details about our support offerings. Enjoy, -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, May 29 2007) Python/Zope Consulting and Support ...http://www.egenix.com/ mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ mxODBC, mxDateTime, mxTextTools ...http://python.egenix.com/ Try mxODBC.Zope.DA for Windows,Linux,Solaris,MacOSX for free ! eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation:
ANN: PyTables 2.0rc2 released
Announcing PyTables 2.0rc2
PyTables is a library for managing hierarchical datasets and designed to
efficiently cope with extremely large amounts of data with support for
full 64-bit file addressing. PyTables runs on top of the HDF5 library
and NumPy package for achieving maximum throughput and convenient use.
This is the second (and probably last) release candidate for PyTables
2.0. On it, together with the traditional bunch of bug fixes, you will
find a handful of optimizations for dealing with very large tables.
Also, the Optimization tips chapter of User's Guide has been updated
and the manual is almost ready (bar some errors or typos we may have
introduced) for the long awaited 2.0 final release. In particular, the
Indexed searches section shows pretty definitive plots on the
performance of the completely new and innovative indexing engine that
will be available in the Pro version (to be released very soon now).
You can download a source package of the version 2.0rc2 with
generated PDF and HTML docs and binaries for Windows from
http://www.pytables.org/download/preliminary/
For an on-line version of the manual, visit:
http://www.pytables.org/docs/manual-2.0rc2
In case you want to know more in detail what has changed in this
version, have a look at ``RELEASE_NOTES.txt``. Find the HTML version
for this document at:
http://www.pytables.org/moin/ReleaseNotes/Release_2.0rc2
If you are a user of PyTables 1.x, probably it is worth for you to look
at ``MIGRATING_TO_2.x.txt`` file where you will find directions on how
to migrate your existing PyTables 1.x apps to the 2.0 version. You can
find an HTML version of this document at
http://www.pytables.org/moin/ReleaseNotes/Migrating_To_2.x
Keep reading for an overview of the most prominent improvements in
PyTables 2.0 series.
New features of PyTables 2.0
- A complete refactoring of many, many modules in PyTables. With this,
the different parts of the code are much better integrated and code
redundancy is kept under a minimum. A lot of new optimizations have
been included as well, making working with it a smoother experience
than ever before.
- NumPy is finally at the core! That means that PyTables no longer
needs numarray in order to operate, although it continues to be
supported (as well as Numeric). This also means that you should be
able to run PyTables in scenarios combining Python 2.5 and 64-bit
platforms (these are a source of problems with numarray/Numeric
because they don't support this combination as of this writing).
- Most of the operations in PyTables have experimented noticeable
speed-ups (sometimes up to 2x, like in regular Python table
selections). This is a consequence of both using NumPy internally and
a considerable effort in terms of refactorization and optimization of
the new code.
- Combined conditions are finally supported for in-kernel selections.
So, now it is possible to perform complex selections like::
result = [ row['var3'] for row in
table.where('(var2 20) | (var1 == sas)') ]
or::
complex_cond = '((%s = col5) (col2 = %s)) ' \
'| (sqrt(col1 + 3.1*col2 + col3*col4) 3)'
result = [ row['var3'] for row in
table.where(complex_cond % (inf, sup)) ]
and run them at full C-speed (or perhaps more, due to the cache-tuned
computing kernel of Numexpr, which has been integrated into PyTables).
- Now, it is possible to get fields of the ``Row`` iterator by
specifying their position, or even ranges of positions (extended
slicing is supported). For example, you can do::
result = [ row[4] for row in table# fetch field #4
if row[1] 20 ]
result = [ row[:] for row in table# fetch all fields
if row['var2'] 20 ]
result = [ row[1::2] for row in # fetch odd fields
table.iterrows(2, 3000, 3) ]
in addition to the classical::
result = [row['var3'] for row in table.where('var2 20')]
- ``Row`` has received a new method called ``fetch_all_fields()`` in
order to easily retrieve all the fields of a row in situations like::
[row.fetch_all_fields() for row in table.where('column1 0.3')]
The difference between ``row[:]`` and ``row.fetch_all_fields()`` is
that the former will return all the fields as a tuple, while the
latter will return the fields in a NumPy void type and should be
faster. Choose whatever fits better to your needs.
- Now, all data that is read from disk is converted, if necessary, to
the native byteorder of the hosting machine (before, this only
happened with ``Table`` objects). This should help to accelerate
applications that have to do computations with data generated in
platforms with a byteorder different than the user machine.
- The modification of values in ``*Array`` objects (through
Re: is and ==
BlueJ774 wrote: Can someone please explain to me the difference between the is keyword and the == boolean operator. I can't figure it out on my own and I can't find any documentation on it. I can't understand why this works: if text is None: and why this always returns false: if message is 'PING': even when message = 'PING'. What's the deal with that? `x is y` means the same thing as: id(x) == id(y) You use the `is` operator for when you're testing for _object identity_, not value. `None` is a special object sentinel that is not only a value but a special _object_, and so if you're testing whether or not an object is `None`, you do so with the `is` operator. If you're testing whether an object is equal to the string PING then you do not want to do so by identity, but rather value, so you use the `==` operator, not `is`. -- Erik Max Francis [EMAIL PROTECTED] http://www.alcyone.com/max/ San Jose, CA, USA 37 20 N 121 53 W AIM, Y!M erikmaxfrancis You could have another fate / You could be in another place -- Anggun -- http://mail.python.org/mailman/listinfo/python-list
Re: is and ==
On May 30, 12:57 am, Erik Max Francis [EMAIL PROTECTED] wrote: BlueJ774 wrote: Can someone please explain to me the difference between the is keyword and the == boolean operator. I can't figure it out on my own and I can't find any documentation on it. I can't understand why this works: if text is None: and why this always returns false: if message is 'PING': even when message = 'PING'. What's the deal with that? `x is y` means the same thing as: id(x) == id(y) You use the `is` operator for when you're testing for _object identity_, not value. `None` is a special object sentinel that is not only a value but a special _object_, and so if you're testing whether or not an object is `None`, you do so with the `is` operator. If you're testing whether an object is equal to the string PING then you do not want to do so by identity, but rather value, so you use the `==` operator, not `is`. -- Erik Max Francis [EMAIL PROTECTED] http://www.alcyone.com/max/ San Jose, CA, USA 37 20 N 121 53 W AIM, Y!M erikmaxfrancis You could have another fate / You could be in another place -- Anggun Thanks. That's exactly what I was looking for. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is PEP-8 a Code or More of a Guideline?
Frank Swarbrick [EMAIL PROTECTED] wrote: Then you'd really love COBOL! :-) Frank COBOL programmer for 10+ years Hey, did you hear about the object-oriented version of COBOL? They call it ADD ONE TO COBOL. -- Tim Roberts, [EMAIL PROTECTED] Providenza Boekelheide, Inc. -- http://mail.python.org/mailman/listinfo/python-list
Re: Key Listeners
On 29 May 2007 19:14:33 -0700, Mike [EMAIL PROTECTED] wrote: Are there key listeners for Python? Either built in or third party? -- http://mail.python.org/mailman/listinfo/python-list I'm pretty sure pygame's got some, don't know about built-ins. -- http://mail.python.org/mailman/listinfo/python-list
Re: Key Listeners
Mike wrote: Are there key listeners for Python? Either built in or third party? (As always on forums like this, you're most likely to get answers if you define your terms. A little Goggling informs me that in Java a key listener is a Java term for a component that generates an event when the keyboard is used. ) Yes, every GUI I've ever used from Python (Tk/Tcl, wxPython, Gtk++, Win32 API, ...) has a way to catch keyboard events. But you're going to have to tell us which OS and which GUI you're interested in before you get a more detailed answer. Gary Herron -- http://mail.python.org/mailman/listinfo/python-list
Re: RDFXML Parser For qualified Dublin Core Database File
Brandon McGinty wrote: Hi All, My goal is to be able to read the www.gutenberg.org http://www.gutenberg.org/ rdf catalog, parse it into a python structure, and pull out data for each record. The catalog is a Dublin core RDF/XML catalog, divided into sections for each book and details for that book. I have done a very large amount of research on this problem. I’ve tried tools such as pyrple, sax/dom/minidom, and some others both standard and nonstandard to a python installation. None of the tools has been able to read this file successfully, and those that can even see the data can take up to half an hour to load with 2 gb of ram. So you all know what I’m talking about, the file is located at: http://www.gutenberg.org/feeds/catalog.rdf.bz2 Does anyone have suggestions for a parser or converter, so I’d be able to view this file, and extract data? Any help is appreciated. Well, have you tried xml.etree.cElementTree, a part of the standard library since 2.5? Well worth a go, as it seems to outperform many XML libraries. The iterparse function is your best bet, allowing you to iterate over the events as you parse the source, thus avoiding the need to build a huge in-memory data structure just to get the parsing done. The following program took about four minutes to run on my not-terribly up-to-date Windows laptop with 1.5 GB of memory with the pure Python version of ElementTree: import xml.etree.ElementTree as ET events = ET.iterparse(open(catalog.rdf)) count = 0 for e in events: count += 1 if count % 10 == 0: print count print count, total events Here's an example output after I changed to using the extension module - by default, only the end-element events are reported. I think you'll be impressed by the timing. The only change was to the import staement, which now reads import xml.etree.cElementTree as ET [EMAIL PROTECTED] ~/Projects/Python $ time python test19.py 10 20 30 40 50 60 70 80 90 100 110 120 130 140 1469971 total events real0m11.145s user0m10.124s sys 0m0.580s Good luck! regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden -- Asciimercial - Get on the web: Blog, lens and tag your way to fame!! holdenweb.blogspot.comsquidoo.com/pythonology tagged items: del.icio.us/steve.holden/python All these services currently offer free registration! -- Thank You for Reading -- http://mail.python.org/mailman/listinfo/python-list
Re: Professional Grant Proposal Writing Workshop (July 2007: University of Montana, Missoula)
Anthony Jones wrote: [...] At its foundation, this course will address the basics of foundation, corporation, and government grant research. However, this course will teach a strategic funding research approach that encourages students to see research not as something they do before they write a proposal, but as an integrated part of the grant seeking process. Students will be exposed to online and database research tools, as well as publications and directories that contain information about foundation, corporation, and government grant opportunities. Focusing on funding sources and basic social science research, this course teaches students how to use research as part of a strategic grant acquisition effort. Registration $597.00 tuition includes all materials and certificates. I wonder if I could get a grant to attend this course? regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden -- Asciimercial - Get on the web: Blog, lens and tag your way to fame!! holdenweb.blogspot.comsquidoo.com/pythonology tagged items: del.icio.us/steve.holden/python All these services currently offer free registration! -- Thank You for Reading -- http://mail.python.org/mailman/listinfo/python-list
Re: Rats! vararg assignments don't work
samwyse wrote: I'm a relative newbie to Python, so please bear with me. After seeing how varargs work in parameter lists, like this: def func(x, *arglist): and this: x = func(1, *moreargs) I thought that I'd try this: first, *rest = arglist Needless to say, it didn't work. That leaves me with two questions. First, is there a good way to do this? For now, I'm using this: first, rest = arglist[0], arglist[1:] but it leaves a bad taste in my mouth. Well, your moreargs parameter is a tuple, and there are innumerable ways to process a tuple. (And even more if you convert it to a list.) If you are just interested in extracting only the first arg, then your code is quite Pythonic. However, if you are going to do that in a loop to successively process each arg, the you have several better options: For instance: for arg in moreargs: # Loop through each arg do something with arg or for i in range(len(moreargs)): do something with morergs[i] # Extract ith arg or argslist = list(moreargs) while argslist: firstarg = argslist.pop(0) # Extract first arg do something with firstarg Gary Herron Second, is there any good reason why it shouldn't work? It seems like such an obvious idiom that I can't believe that I'm the first to come up with the idea. I don't really have the time right now to go source diving, so I can't tell if it would be wildly inefficient to implement. Thanks! -- http://mail.python.org/mailman/listinfo/python-list
Re: The Concepts and Confusions of Prefix, Infix, Postfix and Fully Functional Notations
Prefix, Infix, Postfix notations in Mathematica 2000-02-21, 2007-05 [In the following essay, I discuss prefix, infix, postfix notations and Mathematica's syntax for them. The full HTML formatted article is available at: http://xahlee.org/UnixResource_dir/writ/notations.html ] THE HEAD OF EXPRESSIONS Lisp's nested parenthesis syntax is a Functional Notation. It has the general form of “(f a b ...)” where any of the symbols inside the matching parenthesis may again be that form. For example, here's a typical code from Emacs Lisp. ; Recursively apply (f x i), where i is the ith element in the list li. ; For example, (fold f x '(1 2)) computes (f (f x 1) 2) (defun fold (f x li) (let ((li2 li) (ele) (x2 x)) (while (setq ele (pop li2)) (setq x2 (funcall f x2 ele)) ) x2 ) ) Vast majority of computer languages, interpret source code in a one- dimensional, linear nature. Namely, from left to right, line by line, as in written text. (Examples of computer languages's source code that are not linear in nature, are spread sheets, cellular automata, graphical programing languages) For languages that interprets source code linearly, the logics of their syntax necessarily have a hierarchical structure (i.e. tree). The lisp's notation, is the most effective in visually showing the logics of the syntax. This is because, a function and its arguments, are simply laid out inside a parenthesis. The level of nesting corresponds to the “precedence” in evaluating the expression. The first element inside the matching parenthesis, is called the “head” of the expression. For example, in “(f a b)”, the “f” is the head. The head is a function, and the rest of the symbols inside the matching parenthesis are its arguments. The head of lisp's notation needs not to be defined as the first element inside the parenthesis. For example, we can define the “head” to be the last element inside the parenthesis. So, we write “(arg1 arg2 ... f)” instead of the usual “(f arg1 arg2 ...)” and its syntactical analysis remains unchanged. Like wise, you can move the head outside of the parenthesis. In Mathematica, the head is placed in front of the parenthesis, and square brackets are used instead of parenthesis for the enclosing delimiter. For example, lisp's “(f a b c)” is syntactically equivalent to Mathematica's “f[a,b,c]”. Other examples: “(sin θ)” vs “Sin[θ]”, “(map f list)” vs “Map[f,list]”. Placing the head in front of the matching bracket makes the notation more familiar, because it is a conventional math notation. However, there is a disadvantage in moving the head of a expression from inside the matching bracket to outside. Namely: The nesting of the matching delimiters, no longer corresponds to the logics of the syntax, when the head is itself a compound expression. For example, suppose Reflection(vectorV,pointP) is function that returns a function f, such that f(graphicsData) will reflect the graphicsData along a line passing pointP and parallel to vectorV. In lisp, we would write “((Reflection vectorV pointP) graphicsData)”. In Mathematica, we would write “Reflection[vectorV,pointP] [graphicsData]”. In lisp's version, the nesting corresponds to the logics of the evaluation. In the Mathematica's form, that is no longer so. For another example, suppose Deriv is a function that takes a function f and returns a function g (the derivative of f), and we want to apply g to a variable x. In lisp, we would write “((Deriv f) x)”. In Mathematica, we would write “Deriv[f][x]”. In lisp's version, the nesting corresponds to the logics of the evaluation. In the Mathematica's form, the logics of the evaluation no longer corresponds to the nesting level, because now the head is outside of the enclosing delimiters, so the head of expressions no longer nests. PREFIX, POSTFIX, INFIX A prefix notation in Mathematica is represented as [EMAIL PROTECTED] Essentially, a prefix notation in this context limits it to uses for functions on only one argument. For example: [EMAIL PROTECTED]@[EMAIL PROTECTED] is equivalent to “f[a[b[c]]]” or in lispy “(f (a (b c)))”. Mathematica also offers a postfix notation using the operator “//”. For example, “c//b//a//f” is syntactically equivalent to “f[a[b[c]]]”. (unix's pipe “|” syntax, is a form of postfix notation. e.g. “c | b | a | f”). For example, “Sin[List[1,2,3]]” can be written in postfix as “List[1,2,3]//Sin”, or prefix [EMAIL PROTECTED],2,3]”. (by the way, they are semantically equivalent to “Map[Sin, List[1,2,3]]” in Mathematica) For infix notation, the function symbol is placed between its arguments. In Mathematica, the generic form for infix notation is by sandwiching the tilde symbol around the function name. e.g. “Join[List[1,2],List[3,4]]” is syntactically equivalent to “List[1,2] ~Join~ List[3,4]”. In Mathematica, there is quite a lot syntax variations beside the above mentioned systematic constructs. For example, Plus[a,b,c] can be written as “a+b+c”, “Plus[a+b,c]”,
Re: How to print this character u'\u20ac' to DOS terminal
On 5月30日, 下午1时23分, Martin v. Lowis [EMAIL PROTECTED] wrote: 人言落日是天涯，望极天涯不见家 schrieb: Who could explain the follow issue ? print u'\u0394' Δ print u'\u20ac' Traceback (most recent call last): File stdin, line 1, in module UnicodeEncodeError: 'gbk' codec can't encode character u'\u20ac' in position 0: illegal multibyte sequence My terminal is cmd.exe under windows XP. what's the different between the two character ? what can I do if I want to print the u'\u20ac'? The problem is that your terminal uses (some form of) the GBK encoding; seehttp://zh.wikipedia.org/wiki/GBKfor details on GBK. It seems that GBK (or, rather, code page 936) supports the delta character, but not the euro sign. To change that, you can use chcp in your terminal window. For example, if you do chcp 850, you should be able to display the euro sign (but will simultaneously use the ability to display the letter delta, and the chinese letters). I don't know whether the terminal supports an UTF-8 code page; you can try setting the terminal's code page to 65001 (which should be UTF-8). Regards, Martin Thanks, but it seems not work yet. C:\WINDOWSchcp 850 Active code page: 850 C:\WINDOWSpython Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. print u'\u20ac' Traceback (most recent call last): File stdin, line 1, in module File C:\Python25\lib\encodings\cp850.py, line 12, in encode return codecs.charmap_encode(input,errors,encoding_map) UnicodeEncodeError: 'charmap' codec can't encode character u'\u20ac' in position 0: character maps to undefined C:\WINDOWSchcp 65001 Active code page: 65001 C:\WINDOWSpython Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. print u'\u20ac' Traceback (most recent call last): File stdin, line 1, in module LookupError: unknown encoding: cp65001 --- I find that the u'\u20ac' related 'mbcs' encode is 0x80, I could print it directly print '\x80' � But the string contained the u'\u20ac' is get from remote host. Is there any method to decode it to the local 'mbcs'? -- http://mail.python.org/mailman/listinfo/python-list
print bypasses calling write method for objects inheriting from file?
I created an object that inherits from file and was a bit surprised to find that print seems to bypass the write method for objects inheriting from file. An optimization I suppose. Does this surprise anyone else at all or am I missing something? import sys class FromObject(object): def write(self, string): # this works fine, gets called by print sys.stdout.write(FromObject: + string) class FromFile(file): def __init__(self, name, mode='w'): file.__init__(self, name, mode) def write(self, string): # this does not get called by print sys.stdout.write(FromFile: + string) a = FromObject() b = FromFile(test.txt) a.write(Foo\n) # works as expected b.write(Bar\n) # works as expected print a, Baz\n # FromFile: Baz\nFromFile:\n written to stdout. That's fine. print b, Qux\n b.flush() # Qux\n written to test.txt. b.write wasn't called :( -- http://mail.python.org/mailman/listinfo/python-list
Re: Periodic tasks.
Ramashish Baranwal wrote: Hi, I am trying to execute some tasks periodically, those familiar with unix can think of it as equivalent to cron jobs. I have tried looking around, but couldn't find a way. Would appreciate any pointers or clues.. Thanks, -Ram Have a look at Kronos, a simple task scheduler I wrote a while ago, based on sched. It's part of Turbogears as well: http://trac.turbogears.org/browser/trunk/turbogears/scheduler.py --Irmen -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter Listbox - Different Text colors in one listbox
[EMAIL PROTECTED] wrote: Hi, Is it possible to have different items in a listbox in different colors? Or is it just one color for all items in a listbox? Thanks Rahul You specify text and foreground colour when you make the box, so I don't think its possible. - Hendrik -- http://mail.python.org/mailman/listinfo/python-list
Re: Is PEP-8 a Code or More of a Guideline?
Maric Michaud [EMAIL PROTECTED] wrote: Is typist ok ? It's the google's translation for dactylo. Typist is fine, although MCP that I am, I tend to think of typist as female... I would call a male one a typer, but I dont think it is correct English. - Hendrik -- http://mail.python.org/mailman/listinfo/python-list
Re: print bypasses calling write method for objects inheriting from file?
MisterPete wrote: I created an object that inherits from file and was a bit surprised to find that print seems to bypass the write method for objects inheriting from file. An optimization I suppose. Does this surprise anyone else at all or am I missing something? No, your analysis is correct, though I'd consider optimization an euphemism for bug here. Noone was annoyed enough to write a patch, it seems. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode to HTML entities
Clodoaldo [EMAIL PROTECTED] wrote:
On May 29, 12:57 pm, Richard Brodie [EMAIL PROTECTED] wrote:
Clodoaldo [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
I was looking for a function to transform a unicode string into
htmlentities.
u'São Paulo'.encode('ascii', 'xmlcharrefreplace')
'S#227;o Paulo'
That was a fast answer. I would never find that myself.
You might actually want:
cgi.escape(u'São Paulo Espírito Santo').encode('ascii',
'xmlcharrefreplace')
'S#227;o Paulo amp; Esp#237;rito Santo'
as you have to be sure to escape any ampersands in your unicode
string before doing the encode.
--
http://mail.python.org/mailman/listinfo/python-list
Re: Key Listeners
On 30 mai, 04:14, Mike [EMAIL PROTECTED] wrote: Are there key listeners for Python? Either built in or third party? What is a key listener ? -- http://mail.python.org/mailman/listinfo/python-list
binascii.unhexlify ... not clear about usage, and output
Hi,
I have a file with a long list of hex characters, and I want to get a
file with corresponding binary characters
here's what I did:
import binascii
f1 = 'c:\\temp\\allhex.txt'
f2 = 'c:\\temp\\allbin.txt'
sf = open(f1, 'rU')
df = open(f2, 'w')
slines = sf.readlines()
for line in slines:
... x = line.rstrip('\n')
... y = binascii.unhexlify(x)
... df.write(y)
...
df.close()
sf.close()
But what I get is all garbage, atleast textpad and notepad show that
I tried doing it for only one string, and this is what I am seeing on
the interpreter:
x
'0164'
y
'\x01d'
I was expecting 'y' would come out as a string with binary
characters!!!
What am i missing here? Can someone please help.
Thanks and best regards,
Vishal
--
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Re: multiline regular expression (replace)
Hi, Thanks a lot for useful hints to all of you who replied to my question. I could easily do now what I wanted. Cheers, Zdenek Holger Berger wrote: Hi, yes: import re a= I Am Multiline but short anyhow b=(I[\s\S]*line) print re.search(b, a,re.MULTILINE).group(1) gives I Am Multiline Be aware that . matches NO newlines!!! May be this caused your problems? regards Holger Zdenek Maxa wrote: [EMAIL PROTECTED] wrote: On May 29, 2:03 am, Zdenek Maxa [EMAIL PROTECTED] wrote: Hi all, I would like to perform regular expression replace (e.g. removing everything from within tags in a XML file) with multiple-line pattern. How can I do this? where = open(filename).read() multilinePattern = ^tag \/tag$ re.search(multilinePattern, where, re.MULTILINE) Thanks greatly, Zdenek Why not use an xml package for working with xml files? I'm sure they'll handle your multiline tags. http://effbot.org/zone/element-index.htm http://codespeak.net/lxml/ ~Sean Hi, that was merely an example of what I would like to achieve. However, in general, is there a way for handling multiline regular expressions in Python, using presumably only modules from distribution like re? Thanks, Zdenek -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter Listbox - Different Text colors in one listbox
On Tue, 29 May 2007 19:02:03 +0200, [EMAIL PROTECTED] wrote:
Hi,
Is it possible to have different items in a listbox in different
colors? Or is it just one color for all items in a listbox?
Thanks
Rahul
AFAIK, this is not possible with a listbox. You can however quite easily
emulate the behaviour of a listbox with a text widget, which allows to mix
fonts and colors in any way you like.
I did it once by creating a sub-class of Tkinter.Text (cannot post the
code here - closed source, sorry...) and all I had to do was:
- make sure the text widget had its state to DISABLED all the time, except
when modifying it;
- removing all the bindings defined in the text widgets (use
widget.bind_class('Text') to get all the events, then widget.bind(event,
lambda e: 'break') to remove them);
- define a new binding for a button click selecting the line under the
cursor;
- define the insert, delete and getcurselection methods, taking care of
treating the special index END.
All in all, this was just a few dozen lines.
HTH
--
python -c print ''.join([chr(154 - ord(c)) for c in
'U(17zX(%,5.zmz5(17l8(%,5.Z*(93-965$l7+-'])
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Re: binascii.unhexlify ... not clear about usage, and output
Vishal wrote:
I have a file with a long list of hex characters, and I want to get a
file with corresponding binary characters
here's what I did:
import binascii
f1 = 'c:\\temp\\allhex.txt'
f2 = 'c:\\temp\\allbin.txt'
sf = open(f1, 'rU')
df = open(f2, 'w')
slines = sf.readlines()
for line in slines:
... x = line.rstrip('\n')
... y = binascii.unhexlify(x)
... df.write(y)
...
df.close()
sf.close()
Your code is OK, but you have to open f2 in binary mode if your data is
truly binary (an image, say).
But what I get is all garbage, atleast textpad and notepad show that
I tried doing it for only one string, and this is what I am seeing on
the interpreter:
x
'0164'
y
'\x01d'
I was expecting 'y' would come out as a string with binary
characters!!!
What are binary characters?
What am i missing here? Can someone please help.
What /exactly/ did you expect? Note that \x01d and \x01\x64 are just
different renderings of the same string chr(0x01) + chr(0x64).
Peter
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writing to a file
as i understand there are two ways to write data to a file: using f.write(foo) and print f, foo. what i want to know is which one is faster (if there is any difference in speed) since i'm working with very large files. of course, if there is any other way to write data to a file, i'd love to hear about it -- http://mail.python.org/mailman/listinfo/python-list
calling Postgresql stored procedure
I am using Python 2.4 and Postgresql 8.2 database server. On the database I have created a stored function, example, CREATE OR REPLACE FUNCTION calculateaverage() I created a new python script and would like to call my database stored function. How can I call a database stored function/procedure in python? Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: Speex bindings for python 2.5
On 30 mai, 02:30, momobear [EMAIL PROTECTED] wrote: I forgot to give the url http://www.freenet.org.nz/python/pySpeex/ I Couldn't Open the website. Maybe it was a temporary shutdown, I have no problem here. -- http://mail.python.org/mailman/listinfo/python-list
Re: Speex bindings for python 2.5
In article [EMAIL PROTECTED], momobear [EMAIL PROTECTED] wrote: I forgot to give the url :http://www.freenet.org.nz/python/pySpeex/ I Couldn't Open the website. It works if you knock the colon off the front of the URL as given. -- David Wild using RISC OS on broadband www.davidhwild.me.uk -- http://mail.python.org/mailman/listinfo/python-list
A REAL money maker. IT WORKS!!!!
was up man does this stuff realy works -- http://mail.python.org/mailman/listinfo/python-list
Re: writing to a file
[EMAIL PROTECTED] wrote:
as i understand there are two ways to write data to a file: using
f.write(foo) and print f, foo.
well print will add a '\n' or ' ' if you use ',' after it
what i want to know is which one is faster (if there is any difference
there shouldn't be any noticable difference
in speed) since i'm working with very large files. of course, if there
is any other way to write data to a file, i'd love to hear about it
other ways:
os.system('cat file1 file2')
or subprocess.Popen
or print but sys.stdout = f
or ctypes + printf/fputs/..
and probably there are other obscure ways, but the intended way is
obviously f.write
nsz
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Re: Rats! vararg assignments don't work
Gary Herron wrote:
samwyse wrote:
I'm a relative newbie to Python, so please bear with me. After seeing
how varargs work in parameter lists, like this:
def func(x, *arglist):
and this:
x = func(1, *moreargs)
I thought that I'd try this:
first, *rest = arglist
Needless to say, it didn't work. That leaves me with two questions.
First, is there a good way to do this? For now, I'm using this:
first, rest = arglist[0], arglist[1:]
but it leaves a bad taste in my mouth.
Well, your moreargs parameter is a tuple, and there are innumerable ways
to process a tuple. (And even more if you convert it to a list.)
My use-case is (roughtly) this:
first, *rest = f.readline().split()
return dispatch_table{first}(*rest)
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Re: Key Listeners
[EMAIL PROTECTED] schreef: On 30 mai, 04:14, Mike [EMAIL PROTECTED] wrote: Are there key listeners for Python? Either built in or third party? What is a key listener ? I thought it was a rather straightforward name. Something that listens for a key. In other words, a piece of software that detects what keys are being tapped. In google, the first link is a link to the java sun home page. The first sentence on that page: Key events indicate when the user is typing at the keyboard. Regards, Benedict -- http://mail.python.org/mailman/listinfo/python-list
Re: Rats! vararg assignments don't work
George Sakkis wrote: On May 29, 11:33 pm, Matimus [EMAIL PROTECTED] wrote: Your attemtp: [code] first, rest = arglist[0], arglist[1:] [/code] Is the most obvious and probably the most accepted way to do what you are looking for. As for adding the fucntionality you first suggested, it isn't likely to be implemented. The first step would be to write a PEP though. The time machine did it again: http://www.python.org/dev/peps/pep-3132/. Thanks! Now I just need to wait for Py3K and all of my problems will be solved. ;-) Actually, I'm surprised that the PEP does as much as it does. If tuples are implemented as S-expressions, then something like this: car, *cdr = tuple while leaving cdr a tuple would be trivial to implement. Of course, I'm an old-school LISPer, so what I consider surprising behavior doesn't always surprise anyone else, and vice versa. -- http://mail.python.org/mailman/listinfo/python-list
Python 2.5 and WXPython demo's
Hello, I am new (very) to Python and have just down loaded the latest version of Python (2.5) and WXPython (2.8). For some reason I cannot get the WXPython demo to run at all. I run windows XP and it can't find a program to run the demo. Any advice? (apologies if this has been posted before). -- http://mail.python.org/mailman/listinfo/python-list
Re: Rats! vararg assignments don't work
George Sakkis wrote: The time machine did it again: http://www.python.org/dev/peps/pep-3132/. Uhm, John Swartzwelder, right? :D /W -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.5 and WXPython demo's
Andrew P wrote: Hello, I am new (very) to Python and have just down loaded the latest version of Python (2.5) and WXPython (2.8). For some reason I cannot get the WXPython demo to run at all. I run windows XP and it can't find a program to run the demo. Any advice? (apologies if this has been posted before). The demo is a separate download nowadays. Do you mean you just can't find it, or are you running it and does it give you some error message that you feel we shouldn't be told about? A little more information, please ... regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden -- Asciimercial - Get on the web: Blog, lens and tag your way to fame!! holdenweb.blogspot.comsquidoo.com/pythonology tagged items: del.icio.us/steve.holden/python All these services currently offer free registration! -- Thank You for Reading -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.5 and WXPython demo's
Andrew P wrote: Hello, I am new (very) to Python and have just down loaded the latest version of Python (2.5) and WXPython (2.8). For some reason I cannot get the WXPython demo to run at all. I run windows XP and it can't find a program to run the demo. Any advice? (apologies if this has been posted before). There *should* be a link in your startmenu in the wxPython group. I'm quite positive, but not 100% sure. I think it has the snake-icon. But if it's really not there (as you suggested), simply go the the folder you installed the demo to and run demo.py. Maybe there's a blunder in the installer for the 2.8 demo? Anyone? bye /W -- http://mail.python.org/mailman/listinfo/python-list
Re: writing to a file
[EMAIL PROTECTED] schrieb: as i understand there are two ways to write data to a file: using f.write(foo) and print f, foo. what i want to know is which one is faster (if there is any difference in speed) since i'm working with very large files. of course, if there is any other way to write data to a file, i'd love to hear about it You should look at the mmap-module. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Rats! vararg assignments don't work
Matimus a écrit : (snip) Remember, in Python there is only one way to do it. Actually, it's : There should be one-- and preferably only one --obvious way to do it.. ... Which is quite different. Please notice the should, preferably and obvious. -- http://mail.python.org/mailman/listinfo/python-list
Python + Prolog
For those who may also work with Prolog : http://code.google.com/p/pyswip/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Key Listeners
Benedict Verheyen a écrit : [EMAIL PROTECTED] schreef: On 30 mai, 04:14, Mike [EMAIL PROTECTED] wrote: Are there key listeners for Python? Either built in or third party? What is a key listener ? (snip) In google, the first link is a link to the java sun home page. The first sentence on that page: Key events indicate when the user is typing at the keyboard. I do know what's a key listener in Java, thanks !-) My question was supposed to have side effects - like the OP asking himself if he was really asking the right question. Regards too. -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode to HTML entities
On 29 maj 2007, at 17.52, Clodoaldo wrote:
I was looking for a function to transform a unicode string into
htmlentities. Not only the usual html escaping thing but all
characters.
As I didn't find I wrote my own:
# -*- coding: utf-8 -*-
from htmlentitydefs import codepoint2name
def unicode2htmlentities(u):
htmlentities = list()
for c in u:
if ord(c) 128:
htmlentities.append(c)
else:
htmlentities.append('%s;' % codepoint2name[ord(c)])
return ''.join(htmlentities)
print unicode2htmlentities(u'São Paulo')
Is there a function like that in one of python builtin modules? If not
is there a better way to do it?
Regards, Clodoaldo Pinto Neto
In many cases, the need to use html/xhtml entities can be avoided by
generating
utf8- coded pages.
--
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Tommy Nordgren, The dying old crone
[EMAIL PROTECTED]
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Re: pyAntTasks
On May 28, 7:56 am, kilnhead [EMAIL PROTECTED] wrote: I am trying to use pyAntTasks in Eclipse. I have followed the example in the ibm doc, but I get the following error: [taskdef] Could not load definitions from resource pyAntTasks.properties. It could not be found. I have added pyAntTasks to my classpath and AntHome directory. Anybody have any ideas? I found my major problem. It was spaces in my directory names. -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter Listbox - Different Text colors in one listbox
On May 29, 2:02 pm, [EMAIL PROTECTED] wrote: Hi, Is it possible to havedifferentitems in alistboxindifferentcolors? Or is it justonecolor for all items in alistbox? Thanks Rahul from Tkinter import * root = Tk() l = Listbox(root) l.pack() for x in range(10): l.insert(END, x) l.itemconfig(2, bg='red', fg='white') l.itemconfig(4, bg='green', fg='white') l.itemconfig(5, bg='cyan', fg='white') root.mainloop() You can _only_ configurate 'background', 'foreground', 'selectbackground', 'selectforegroud', not font :( HTH -- http://mail.python.org/mailman/listinfo/python-list
Re: Rats! vararg assignments don't work
samwyse a écrit : George Sakkis wrote: On May 29, 11:33 pm, Matimus [EMAIL PROTECTED] wrote: Your attemtp: [code] first, rest = arglist[0], arglist[1:] [/code] Is the most obvious and probably the most accepted way to do what you are looking for. As for adding the fucntionality you first suggested, it isn't likely to be implemented. The first step would be to write a PEP though. The time machine did it again: http://www.python.org/dev/peps/pep-3132/. Thanks! Now I just need to wait for Py3K and all of my problems will be solved. ;-) Actually, I'm surprised that the PEP does as much as it does. If tuples are implemented as S-expressions, then something like this: car, *cdr = tuple while leaving cdr a tuple would be trivial to implement. Of course, I'm an old-school LISPer, so what I consider surprising behavior doesn't always surprise anyone else, and vice versa. Remember all these are copies of the original sequence, the lisp equivalent to car/cdr is feasible with an iterator : it = iter(seq) car, cdr = it.next(), it -- http://mail.python.org/mailman/listinfo/python-list
Re: Key Listeners
On 5/30/07, Bruno Desthuilliers [EMAIL PROTECTED] wrote: Benedict Verheyen a écrit : [EMAIL PROTECTED] schreef: On 30 mai, 04:14, Mike [EMAIL PROTECTED] wrote: Are there key listeners for Python? Either built in or third party? What is a key listener ? (snip) In google, the first link is a link to the java sun home page. The first sentence on that page: Key events indicate when the user is typing at the keyboard. I do know what's a key listener in Java, thanks !-) My question was supposed to have side effects - like the OP asking himself if he was really asking the right question. Regards too. -- http://mail.python.org/mailman/listinfo/python-list What, he wants to know if there's a way in python to capture keystrokes, and do something with them depending on what they are. I mean, it's very unlikely that you would ask for something called a key listener if you didn't want to do something like: if keypress == 'a': do somem right? Even if you're looking to do it the java way, all of the listener functionality more or less boils down to wait for and report keys being pressed. He could have been less ambiguous, but I don't think that he was asking the wrong question per se. Not to mention asking the OP what's a key listener isn't going to make them think about the question they asked - it makes it seem like you don't know what a key listener is (and frankly, I think that if you have done any work with doing stuff on different keystrokes, you'll figure out what is meant by key listener pretty quickly, even if you haven't heard the term before) -- http://mail.python.org/mailman/listinfo/python-list
Re: calling Postgresql stored procedure
Alchemist schrieb: I am using Python 2.4 and Postgresql 8.2 database server. On the database I have created a stored function, example, CREATE OR REPLACE FUNCTION calculateaverage() I created a new python script and would like to call my database stored function. How can I call a database stored function/procedure in python? with : SELECT calculateaverage() FROM ... WHERE ... ; happy pythoning Herbert -- http://mail.python.org/mailman/listinfo/python-list
Re: Periodic tasks.
Steve Howell wrote: Thanks. Here are two links, not sure those are exactly what are being referenced here, but look in the ballpark: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/413137 http://docs.python.org/lib/module-sched.html You're welcome. The ActiveState recipe you mention above is not the one I meant, although it uses sched. I saw the recipe that I mentioned, in the print version of the Python Cookbook, when reading it a few days ago. The second link above you mention is right, its about the sched library. Also just found these other recipes in the online Python Cookbook, may or may not be of help to you: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/496800 http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/114644 Vasudev Ram www.dancingbison.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.5 and WXPython demo's
Wildemar Wildenburger wrote: Andrew P wrote: Hello, I am new (very) to Python and have just down loaded the latest version of Python (2.5) and WXPython (2.8). For some reason I cannot get the WXPython demo to run at all. I run windows XP and it can't find a program to run the demo. Any advice? (apologies if this has been posted before). There *should* be a link in your startmenu in the wxPython group. I'm quite positive, but not 100% sure. I think it has the snake-icon. But if it's really not there (as you suggested), simply go the the folder you installed the demo to and run demo.py. Maybe there's a blunder in the installer for the 2.8 demo? Anyone? Can't answer that, but on one from two (almost identical) PC's, I had trouble too, the other went fluently. On both PC's, there was an older wxPython (2.6 I believe), (which from what I've read should be no problem at all), which wasn't overruled, by some specific file (wx.pth) to point to the newest. The effect is that the demo tries to run, can't find aiw?? or something like that and crashes (on fast PC's you actually just see a dos box flashing). Editing the wx.pth file solved the problem. cheers, Stef Mientki -- http://mail.python.org/mailman/listinfo/python-list
Re: Rats! vararg assignments don't work
samwyse [EMAIL PROTECTED] wrote:
samwyse wrote:
I thought that I'd try this:
first, *rest = arglist
Needless to say, it didn't work.
[ ... ]
My use-case is (roughtly) this:
first, *rest = f.readline().split()
return dispatch_table{first}(*rest)
first, rest = f.readline().split(None, 1)
return dispatch_table{first}(*rest.split())
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Frankly I have no feelings towards penguins one way or the other
-- Arthur C. Clarke
her nu becomeþ se bera eadward ofdun hlæddre heafdes bæce bump bump bump
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Re: Key Listeners
On May 30, 10:14 am, Mike [EMAIL PROTECTED] wrote: Are there key listeners for Python? Either built in or third party? try pykeylogger, that's maybe u want. -- http://mail.python.org/mailman/listinfo/python-list
Re: SMTPAuthenticationError
To help debug this, you may want to try the following. 1) Copy smptlib.py into your local directory. On my box, you can find it here, or import sys; print sys.path to help find it on your box: /usr/local/lib/python2.3 2) Go the login() method, add some print statements there to see what's going on. I admit to not being an SMTP expert nor fully understanding the code at first glance, but here is some code iin smtplib.py that suggests you're close to getting this working, to the extent that your server wants base64 encoding: def encode_cram_md5(challenge, user, password): challenge = base64.decodestring(challenge) response = user + + hmac.HMAC(password, challenge).hexdigest() return encode_base64(response, eol=) Hope this helps. Thanks Steve, that helped a lot. smtplib was trying to a CRAM-MD5 auth which wasn't working. I don't know why. But when I made it do a LOGIN auth by changing its preferred_auth list, it worked. Login has its own preferred list of auth methods which is nice except that not all servers which advertise a particular method may be capable of handling that. It would have been good if there was optionally a way to specify in login() what method to use. For now, I am simply going to derive SMTP to form a class that does LOGIN auth. Ram -- http://mail.python.org/mailman/listinfo/python-list
Re: How to print this character u'\u20ac' to DOS terminal
On May 30, 3:05 pm, 人言落日是天涯，望极天涯不见家 [EMAIL PROTECTED] wrote: On 5月30日, 下午1时23分, Martin v. Lowis [EMAIL PROTECTED] wrote: 人言落日是天涯，望极天涯不见家 schrieb: Who could explain the follow issue ? print u'\u0394' Δ print u'\u20ac' Traceback (most recent call last): File stdin, line 1, in module UnicodeEncodeError: 'gbk' codec can't encode character u'\u20ac' in position 0: illegal multibyte sequence My terminal is cmd.exe under windows XP. what's the different between the two character ? what can I do if I want to print the u'\u20ac'? The problem is that your terminal uses (some form of) the GBK encoding; seehttp://zh.wikipedia.org/wiki/GBKfordetails on GBK. It seems that GBK (or, rather, code page 936) supports the delta character, but not the euro sign. To change that, you can use chcp in your terminal window. For example, if you do chcp 850, you should be able to display the euro sign (but will simultaneously use the ability to display the letter delta, and the chinese letters). I don't know whether the terminal supports an UTF-8 code page; you can try setting the terminal's code page to 65001 (which should be UTF-8). Regards, Martin Thanks, but it seems not work yet. C:\WINDOWSchcp 850 Active code page: 850 C:\WINDOWSpython Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. print u'\u20ac' Traceback (most recent call last): File stdin, line 1, in module File C:\Python25\lib\encodings\cp850.py, line 12, in encode return codecs.charmap_encode(input,errors,encoding_map) UnicodeEncodeError: 'charmap' codec can't encode character u'\u20ac' in position 0: character maps to undefined C:\WINDOWSchcp 65001 Active code page: 65001 C:\WINDOWSpython Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. print u'\u20ac' Traceback (most recent call last): File stdin, line 1, in module LookupError: unknown encoding: cp65001 --- I find that the u'\u20ac' related 'mbcs' encode is 0x80, I could print it directly print '\x80' � But the string contained the u'\u20ac' is get from remote host. Is there any method to decode it to the local 'mbcs'? -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode to HTML entities
On May 30, 8:53 am, Tommy Nordgren [EMAIL PROTECTED] wrote:
On 29 maj 2007, at 17.52, Clodoaldo wrote:
I was looking for a function to transform a unicode string into
htmlentities. Not only the usual html escaping thing but all
characters.
As I didn't find I wrote my own:
# -*- coding: utf-8 -*-
from htmlentitydefs import codepoint2name
def unicode2htmlentities(u):
htmlentities = list()
for c in u:
if ord(c) 128:
htmlentities.append(c)
else:
htmlentities.append('%s;' % codepoint2name[ord(c)])
return ''.join(htmlentities)
print unicode2htmlentities(u'São Paulo')
Is there a function like that in one of python builtin modules? If not
is there a better way to do it?
Regards, Clodoaldo Pinto Neto
In many cases, the need to use html/xhtml entities can be avoided by
generating
utf8- coded pages.
Sure. All my pages are utf-8 encoded. The case I'm dealing with is an
email link which subject has non ascii characters like in:
a href=mailto:[EMAIL PROTECTED]Mail to/a
Somehow when the user clicks on the link the subject goes to his email
client with the non ascii chars as garbage.
And before someone points that I should not expose email addresses,
the email is only linked with the consent of the owner and the source
is obfuscated to make it harder for a robot to harvest it.
Regards, Clodoaldo
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Re: How to print this character u'\u20ac' to DOS terminal
On May 30, 3:05 pm, 人言落日是天涯，望极天涯不见家 [EMAIL PROTECTED] wrote: On 5月30日, 下午1时23分, Martin v. Lowis [EMAIL PROTECTED] wrote: 人言落日是天涯，望极天涯不见家 schrieb: Who could explain the follow issue ? print u'\u0394' Δ print u'\u20ac' Traceback (most recent call last): File stdin, line 1, in module UnicodeEncodeError: 'gbk' codec can't encode character u'\u20ac' in position 0: illegal multibyte sequence My terminal is cmd.exe under windows XP. what's the different between the two character ? what can I do if I want to print the u'\u20ac'? The problem is that your terminal uses (some form of) the GBK encoding; seehttp://zh.wikipedia.org/wiki/GBKfordetails on GBK. It seems that GBK (or, rather, code page 936) supports the delta character, but not the euro sign. To change that, you can use chcp in your terminal window. For example, if you do chcp 850, you should be able to display the euro sign (but will simultaneously use the ability to display the letter delta, and the chinese letters). I don't know whether the terminal supports an UTF-8 code page; you can try setting the terminal's code page to 65001 (which should be UTF-8). Regards, Martin Thanks, but it seems not work yet. C:\WINDOWSchcp 850 Active code page: 850 C:\WINDOWSpython Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. print u'\u20ac' Traceback (most recent call last): File stdin, line 1, in module File C:\Python25\lib\encodings\cp850.py, line 12, in encode return codecs.charmap_encode(input,errors,encoding_map) UnicodeEncodeError: 'charmap' codec can't encode character u'\u20ac' in position 0: character maps to undefined C:\WINDOWSchcp 65001 Active code page: 65001 C:\WINDOWSpython Python 2.5.1 (r251:54863, Apr 18 2007, 08:51:08) [MSC v.1310 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. print u'\u20ac' Traceback (most recent call last): File stdin, line 1, in module LookupError: unknown encoding: cp65001 --- I find that the u'\u20ac' related 'mbcs' encode is 0x80, I could print it directly print '\x80' � But the string contained the u'\u20ac' is get from remote host. Is there any method to decode it to the local 'mbcs'? forgot to unicode(string) before send it? -- http://mail.python.org/mailman/listinfo/python-list
Re: Unicode to HTML entities
On May 30, 4:25 am, Duncan Booth [EMAIL PROTECTED] wrote:
Clodoaldo [EMAIL PROTECTED] wrote:
On May 29, 12:57 pm, Richard Brodie [EMAIL PROTECTED] wrote:
Clodoaldo [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
I was looking for a function to transform a unicode string into
htmlentities.
u'São Paulo'.encode('ascii', 'xmlcharrefreplace')
'S#227;o Paulo'
That was a fast answer. I would never find that myself.
You might actually want:
cgi.escape(u'São Paulo Espírito Santo').encode('ascii',
'xmlcharrefreplace')
'S#227;o Paulo amp; Esp#237;rito Santo'
as you have to be sure to escape any ampersands in your unicode
string before doing the encode.
I will do it. Thanks.
Regards, Clodoaldo.
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Pydev 1.3.4 Released
Hi All, Pydev and Pydev Extensions 1.3.4 have been released Details on Pydev Extensions: http://www.fabioz.com/pydev Details on Pydev: http://pydev.sf.net Details on its development: http://pydev.blogspot.com Release Highlights in Pydev Extensions: - * Mark Occurrences: 'global' used in the global scope is correctly treated. * Code Analysis: __builtins__ considered in global namespace Release Highlights in Pydev: -- * Debugger: Breakpoints working correctly on external files opened with 'File Open File...'. * Debugger: Python 2.5 accepts breakpoints in the module level. * Debugger: Unicode variables can be shown in the variables view. * Editor: Coding try..except / try..finally auto-dedents. * Code Completion: __builtins__ considered a valid completion * Pydev Package Explorer: Opens files with correct editor (the pydev editor was forced). What is PyDev? --- PyDev is a plugin that enables users to use Eclipse for Python and Jython development -- making Eclipse a first class Python IDE -- It comes with many goodies such as code completion, syntax highlighting, syntax analysis, refactor, debug and many others. Cheers, -- Fabio Zadrozny -- Software Developer ESSS - Engineering Simulation and Scientific Software http://www.esss.com.br Pydev Extensions http://www.fabioz.com/pydev Pydev - Python Development Enviroment for Eclipse http://pydev.sf.net http://pydev.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Periodic tasks.
On May 29, 2:33 pm, Ramashish Baranwal [EMAIL PROTECTED] wrote: Hi, I am trying to execute some tasks periodically, those familiar with unix can think of it as equivalent to cron jobs. I have tried looking around, but couldn't find a way. Would appreciate any pointers or clues.. Thanks, -Ram I googled twisted cron, if u use twisted, that's maybe help u: http://svn.zope.org/Zope3/trunk/src/scheduler/cron.py?rev=38967view=auto http://twistedmatrix.com/pipermail/twisted-python/2006-June/013525.html -- http://mail.python.org/mailman/listinfo/python-list
Re: How to print this character u'\u20ac' to DOS terminal
??? wrote:
But the string contained the u'\u20ac' is get from remote host. Is
there any method to decode it to the local 'mbcs'?
remote_string = u'\u20ac'
try:
local_string = remote_string.encode('mbcs')
except:
# no mbcs equivalent available
print encoding error
else:
# local_string is now an 8-bit string
print result:, local_string
# if console is not mbcs, you should see incorrect result
assert result == '\x80'
Mbcs is windows-only so I couldn't test this.
If your application handles text, it may be easier to just leave everything
in Unicode and encode to utf-8 for storage?
Regards,
Tijs
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Re: Malformed big5 reading bug
tsuraan wrote: Python enters some sort of infinite loop when attempting to read data from a malformed file that is big5 encoded (using the codecs library). This behaviour can be observed under Linux and FreeBSD, using Python 2.4 and 2.5. A really simple example illustrating the bug follows: ... be a good but to have out there so a future version of python can (hopefully) fix this. Please, file a bug in SourceForge, with the example and everything. Thanks! -- . Facundo . Blog: http://www.taniquetil.com.ar/plog/ PyAr: http://www.python.org/ar/ -- http://mail.python.org/mailman/listinfo/python-list
Re: xmlrpclib hangs execution
I'm sorry to keep bumping my request, but I've been working on this
problem for several months now and am stuck. Perhaps you do not have a
direct answer, but know someone or someforum where I could ask these
XML-RPC or TCP/IP package questions.
Thanks,
Arno.
Arno Stienen wrote:
Perhaps I should be a bit more specific. When using this code to connect
to a remote XML-RPC server (C++, xmlrpc++0.7 library):
import xmlrpclib
server = xmlrpclib.Server(http://10.10.101.62:29500;)
print server.Connection_Request(roberto)
the Python command line 'hangs' until I kill the server. Then, the
correct output is suddenly displayed:
{'state': 0, 'id_session': '2Z3EUSLJFA13', 'port': 29501,
'str': 'Connection accepted. Session attached.'}
Yet a slightly simpler call works flawlessly:
import xmlrpclib
server = xmlrpclib.Server(http://10.10.101.62:29500;)
print server.Info_RT('Master')
{'state': 0, 'str': 'Info_RT'}
Looking at the TCP packages (using Wireshark), the first
Connection_Request flow as follows (c=python client,s= xml-rpcserver):
1 cs SYN
2 sc SYN,ACK
3 cs ACK
4 cs PSH,ACK (setting content-type: text/xml)
5 sc ACK
6 cs PSH,ACK (xml-rpc request)
7 sc ACK
8 sc PSH,ACK (xml-rpc results, correct)
9 cs ACK
At this point, Python 'hangs' until I kill (-9) the server (28 seconds
later), and then these last packages are send:
10sc FIN,ACK
11cs FIN,ACk
12sc ACK
After which Python continues and prints the xml-rpc results on the
screen. Strangely, before Python hangs, it has already received the
package with the results, but doesn't do anything with it.
For comparison, this is the package flow for the Info_RT method, which
returns within a second with the correct result on the Python command line:
1 cs SYN
2 sc SYN,ACK
3 cs ACK
4 cs PSH,ACK (setting content-type: text/xml)
5 sc ACK
6 cs PSH,ACK (xml-rpc request)
7 sc ACK
8 sc PSH,ACK (xml-rpc results, correct)
9 sc FIN,ACK
10cs ACK
11cs FIN,ACk
12sc ACK
Notice the reverse order of packages 9 and 10. Could this be it? Is
Python waiting until the server sends a FIN package? But if so, why?
Looking at the Python trace, this might be it. A diff between the trace
of the killed Connection_Request and the Info_RT resulted only in
expected differences (due to different length of parameters). But when
diffing the traces of the killed and non-killed Connection_Request,
something else is visible. The killed Connection_Request ends with:
[...]
string:318: return sep.join(words)
xmlrpclib:866: self._type = params
xmlrpclib:769: try:
xmlrpclib:770: f = self.dispatch[tag]
xmlrpclib:771: except KeyError:
xmlrpclib:772: pass # unknown tag ?
xmlrpclib:1273: if sock:
xmlrpclib:1274: response = sock.recv(1024)
xmlrpclib:1277: if not response:
xmlrpclib:1278: break
xmlrpclib:1283: file.close()
socket:218: try:
socket:219: if self._sock:
socket:220: self.flush()
socket:232: if self._wbuf:
socket:222: self._sock = None
xmlrpclib:1284: p.close()
xmlrpclib:530: self._parser.Parse(, 1) # end of data
xmlrpclib:531: del self._target, self._parser # get rid of
circular references
xmlrpclib:1286: return u.close()
xmlrpclib:741: if self._type is None or self._marks:
xmlrpclib:743: if self._type == fault:
xmlrpclib:745: return tuple(self._stack)
socket:225: try:
socket:226: self.close()
socket:218: try:
socket:219: if self._sock:
socket:222: self._sock = None
xmlrpclib:1386: if len(response) == 1:
xmlrpclib:1387: response = response[0]
xmlrpclib:1389: return response
__main__:26: print result
{'state': 0, 'id_session': 'QDLY3GP9FBM5', 'port': 29501, 'str':
'Connection accepted. Session attached.'}
But the non-killed Connection_Request looks like:
[...]
return sep.join(words)
xmlrpclib:866: self._type = params
xmlrpclib:769: try:
xmlrpclib:770: f = self.dispatch[tag]
xmlrpclib:771: except KeyError:
xmlrpclib:772: pass # unknown tag ?
xmlrpclib:1273: if sock:
xmlrpclib:1274: response = sock.recv(1024)
socket:225: try:
socket:226: self.close()
socket:218: try:
socket:219: if self._sock:
socket:220: self.flush()
socket:232: if self._wbuf:
socket:222: self._sock = None
(In the diff there is a gap
Re: Scope - import and globals
HMS Surprise wrote: In the file snippet below the value for the global hostName is determined at runtime. Functions imported from the parent baseClass file such as logon also need access to this variable but cannot see it the with the implementation I have attempted here. Use a class variable: class baseClass: hostName = None # undefined yet def someFunc(self): assert self.hostName is not None, hostname not set yet ... # use hostName here class temp(baseClass): def runTest(self): baseClass.hostName = getHostName() ... or a global variable: baseClass.py: hostName = None class baseClass: def someFunc(self): assert hostName is not None testme.py: import baseClass class temp(baseClass.baseClass): baseClass.hostName = getHostName() although neither solution strikes me as very elegant. I would normally pass the hostname to the constructor of baseClass or use a separate 'settings' module. Global variables are per-module. Use the global keyword when assigning a global variable in the 'current' module. Global variables of other modules are properties of the module, use module.name. Also, functions in this file and in the imported parent class need PyHttpTestCase. Does there need to be an import statement in both files? Yes. Don't worry, the work is done only once. Regards, Tijs -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.5 and WXPython demo's
On May 30, 7:29 am, stef [EMAIL PROTECTED] wrote: Wildemar Wildenburger wrote: Andrew P wrote: Hello, I am new (very) to Python and have just down loaded the latest version of Python (2.5) and WXPython (2.8). For some reason I cannot get the WXPython demo to run at all. I run windows XP and it can't find a program to run the demo. Any advice? (apologies if this has been posted before). There *should* be a link in your startmenu in the wxPython group. I'm quite positive, but not 100% sure. I think it has the snake-icon. But if it's really not there (as you suggested), simply go the the folder you installed the demo to and run demo.py. Maybe there's a blunder in the installer for the 2.8 demo? Anyone? Can't answer that, but on one from two (almost identical) PC's, I had trouble too, the other went fluently. On both PC's, there was an older wxPython (2.6 I believe), (which from what I've read should be no problem at all), which wasn't overruled, by some specific file (wx.pth) to point to the newest. The effect is that the demo tries to run, can't find aiw?? or something like that and crashes (on fast PC's you actually just see a dos box flashing). Editing the wx.pth file solved the problem. cheers, Stef Mientki I haven't had any problems in with the demo...but then again, I uninstalled the previous version before putting on the new demo. I did have some minor problems choosing which version I wanted to run with my scripts, but that has nothing to do with the demo. Mike -- http://mail.python.org/mailman/listinfo/python-list
Windows build of PostgreSQL library for 2.5
I've been looking for a Windows version of a library to interface to PostgreSQL, but can only find ones compiled under Python version 2.4. Is there a 2.5 build out there? -- Ben Sizer -- http://mail.python.org/mailman/listinfo/python-list
Re: Key Listeners
kaens a écrit : On 5/30/07, Bruno Desthuilliers [EMAIL PROTECTED] wrote: Benedict Verheyen a écrit : [EMAIL PROTECTED] schreef: On 30 mai, 04:14, Mike [EMAIL PROTECTED] wrote: Are there key listeners for Python? Either built in or third party? What is a key listener ? (snip) In google, the first link is a link to the java sun home page. The first sentence on that page: Key events indicate when the user is typing at the keyboard. I do know what's a key listener in Java, thanks !-) My question was supposed to have side effects - like the OP asking himself if he was really asking the right question. Regards too. -- http://mail.python.org/mailman/listinfo/python-list What, he wants to know if there's a way in python to capture keystrokes, and do something with them depending on what they are. Which would have been a much better way to express the question. I mean, it's very unlikely that you would ask for something called a key listener if you didn't want to do something like: if keypress == 'a': do somem right? Wrong. *You* can deduce this from the OP question because you know Java (and more exactly : GUI programming in Java). As far as I'm concerned, a 'key listener' could be something observing adding/deletion of key/value couples in a dict !-) Not to mention asking the OP what's a key listener isn't going to make them think about the question they asked - it makes it seem like you don't know what a key listener is Exactly. Which may lead the OP to the conclusion that not everybody knows Java GUI programming, and that it may be better to ask in more general terms... Also, and FWIW, there are words that name very different concepts in different languages. And I don't know each and every concept of each and every language in the world (perhaps you do ?). So, just because I know what name X means in langage Y doesn't necessarily imply the OP isn't thinking of what it means in langage ZZ... -- http://mail.python.org/mailman/listinfo/python-list
Re: Key Listeners
kaens schreef: snip What, he wants to know if there's a way in python to capture keystrokes, and do something with them depending on what they are. I mean, it's very unlikely that you would ask for something called a key listener if you didn't want to do something like: if keypress == 'a': do somem right? Even if you're looking to do it the java way, all of the listener functionality more or less boils down to wait for and report keys being pressed. He could have been less ambiguous, but I don't think that he was asking the wrong question per se. Not to mention asking the OP what's a key listener isn't going to make them think about the question they asked - it makes it seem like you don't know what a key listener is (and frankly, I think that if you have done any work with doing stuff on different keystrokes, you'll figure out what is meant by key listener pretty quickly, even if you haven't heard the term before) That's how it came across for me too. Couldn't have said it better kaens. Benedict -- http://mail.python.org/mailman/listinfo/python-list
New-style classes and special methods
Hi My question is about how special methods are stored internally in Python objects. Consider a new-style class which implements special methods such as __call__ and __new__ class C(type): def __call__(...): body class B: __metaclass__ = C stuff b= B() The type of C is 'type', that of B is 'C'. When B is instantiated, the __call__ method of C is first invoked, since C is the metaclass for B. Internally, when a Python callable object 'obj' is called, the actual function called seems to be 'obj-ob_type-tp_call'. Does this that somehow the '__call__' method defined in C above is assigned to the 'tp_call' slot in the object representing the class C, instead of it just being stored in the dictionary like a normal attribute? Where and how does this magic happen exactly? I'd appreciate any level of detail. Thanks! Raj -- http://mail.python.org/mailman/listinfo/python-list
Re: Windows build of PostgreSQL library for 2.5
On May 30, 4:15 pm, Ben Sizer [EMAIL PROTECTED] wrote: I've been looking for a Windows version of a library to interface to PostgreSQL, but can only find ones compiled under Python version 2.4. Is there a 2.5 build out there? -- Ben Sizer Is this what you are looking for? http://stickpeople.com/projects/python/win-psycopg/ Frank Millman -- http://mail.python.org/mailman/listinfo/python-list
google maps api for py?
I see that the weapon of choice for google maps is javascript... Is there anything for python? Kev -- http://mail.python.org/mailman/listinfo/python-list
Re: writing to a file
On May 30, 1:41 pm, Diez B. Roggisch [EMAIL PROTECTED] wrote:
[EMAIL PROTECTED] schrieb:
what i want to know is which one is faster (if there is any difference
in speed) since i'm working with very large files. of course, if there
is any other way to write data to a file, i'd love to hear about it
You should look at the mmap-module.
Yes, memory mappings can be more efficient than files accessed using
file descriptors. But mmap does not take an offset parameter, and is
therefore not suited for working with large files. For example you
only have a virtual memory space of 4 GiB on a 32 bit system, so there
is no way mmap can access the last 4 GiB of an 8 GiB file on a 32 bit
system. If mmap took an offset parameter, this would not be a problem.
However, numpy has a properly working memory mapped array class,
numpy.memmap. It can be used for fast file access. Numpy also has a
wide range of datatypes that are efficient for working with binary
data (e.g. an uint8 type for bytes), and a record array for working
with structured binary data. This makes numpy very attractive when
working with binary data files.
Get the latest numpy here: www.scipy.org.
Let us say you want to memory map an 23 bit RGB image of 640 x 480
pixels, located at an offset of 4096 bytes into the file 'myfile.dat'.
Here is how numpy could do it:
import numpy
byte = numpy.uint8
desc = numpy.dtype({'names':['r','g','b'],'formats':[byte,byte,byte]})
mm = numpy.memmap('myfile.dat', dtype=desc, offset=4096,
shape=(480,640), order='C')
red = mm['r']
green = mm['g']
blue = mm['b']
Now you can access the RGB values simply by slicing the arrays red,
green, and blue. To set the R value of every other horizontal line to
0, you could simply write
red[::2,:] = 0
As always when working with memory mapped files, the changes are not
committed before the memory mapping is synchronized with the file
system. Thus, call
mm.sync()
when you want the actual write process to start.
The memory mapping will be closed when it is garbage collected
(typically when the reference count falls to zero) or when you call
mm.close().
--
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Re: xmlrpclib hangs execution
Arno Stienen wrote:
Arno Stienen wrote:
Perhaps I should be a bit more specific. When using this code to connect
to a remote XML-RPC server (C++, xmlrpc++0.7 library):
import xmlrpclib
server = xmlrpclib.Server(http://10.10.101.62:29500;)
print server.Connection_Request(roberto)
the Python command line 'hangs' until I kill the server. Then, the
correct output is suddenly displayed:
{'state': 0, 'id_session': '2Z3EUSLJFA13', 'port': 29501,
'str': 'Connection accepted. Session attached.'}
Yet a slightly simpler call works flawlessly:
import xmlrpclib
server = xmlrpclib.Server(http://10.10.101.62:29500;)
print server.Info_RT('Master')
{'state': 0, 'str': 'Info_RT'}
After having a quick look at your files, I conclude that the problem is in a
combination of two problems:
1. Your server is crap. It answers an HTTP/1.0 request by an HTTP/1.1
response without specifying any Connection header and without closing the
connection. Normally, a simple client that is not HTTP/1.1-aware expects
the connection to close. HTTP/1.1 leaves the connection open by default.
2. The Python implementation of xmlrpc is not very robust. It just waits for
the connection to close. A well-written client (like your Java client)
would detect the presence of a Content-Length header and use that.
The other request is OK because the server closes the connection after
having sent the response. Why the difference? Don't know, but it is
something server-side.
Try to force the server to send HTTP/1.0 responses, or turn off keep-alive,
or something like that. Otherwise, adapt xmlrpclib.py to robustly handle
1.1 responses.
--
Regards,
Tijs
--
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Re: New-style classes and special methods
Raj B [EMAIL PROTECTED] wrote: Hi My question is about how special methods are stored internally in Python objects. Consider a new-style class which implements special methods such as __call__ and __new__ class C(type): def __call__(...): body class B: __metaclass__ = C stuff b= B() The type of C is 'type', that of B is 'C'. When B is instantiated, the __call__ method of C is first invoked, since C is the metaclass for B. Internally, when a Python callable object 'obj' is called, the actual function called seems to be 'obj-ob_type-tp_call'. Does this that somehow the '__call__' method defined in C above is assigned to the 'tp_call' slot in the object representing the class C, instead of it just being stored in the dictionary like a normal attribute? Where and how does this magic happen exactly? I'd appreciate any level of detail. Yes, special methods populate the slots in the structures which Python uses to represent types. Objects/typeobject.c in the Python source distribution does the hard work, particularly in function type_new (line 1722 in my current SVN checkout). If you're not comfortable reading C code you may want to try looking at the Python implemented in Python project, pypy, or perhaps alternatives such as Jython (in Java) or better IronPython (in C#), but I am not familiar in detail with how they deal with the issue. Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: How to print this character u'\u20ac' to DOS terminal
On 5月30日, 下午9时03分, Tijs [EMAIL PROTECTED] wrote:
??? wrote:
But the string contained the u'\u20ac' is get from remote host. Is
there any method to decode it to the local 'mbcs'?
remote_string = u'\u20ac'
try:
local_string = remote_string.encode('mbcs')
except:
# no mbcs equivalent available
print encoding error
else:
# local_string is now an 8-bit string
print result:, local_string
# if console is not mbcs, you should see incorrect result
assert result == '\x80'
Mbcs is windows-only so I couldn't test this.
If your application handles text, it may be easier to just leave everything
in Unicode and encode to utf-8 for storage?
Regards,
Tijs
Yes, it works, thank you.
But I doubt this way may not work on linux. Maybe I should write some
additional code for supporting both windows and linux OS.
--
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Re: Rats! vararg assignments don't work
samwyse [EMAIL PROTECTED] wrote: ... Actually, I'm surprised that the PEP does as much as it does. If tuples are implemented as S-expressions, then something like this: Tuples are implemented as compact arrays of pointer-to-PyObject (so are lists, BTW). So, for example, a 10-items tuple takes 40 bytes (plus a small overhead for the header) on a 32-bit build, not 80 as it would if implemented as a linked list of (pointer-to-object, pointer-to-next) pairs; addressing sometuple[N] is O(1), NOT O(N); etc, etc. Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: How to print this character u'\u20ac' to DOS terminal
人言落日是天涯，望极天涯不见家 wrote: Yes, it works, thank you. But I doubt this way may not work on linux. Maybe I should write some additional code for supporting both windows and linux OS. Depends on what you want to do. Printing to a DOS terminal is hard in Linux :-) If you write server code, best to keep all text in unicode. -- Regards, Tijs -- http://mail.python.org/mailman/listinfo/python-list
Re: writing to a file
On May 30, 4:53 pm, sturlamolden [EMAIL PROTECTED] wrote:
import numpy
byte = numpy.uint8
desc = numpy.dtype({'names':['r','g','b'],'formats':[byte,byte,byte]})
mm = numpy.memmap('myfile.dat', dtype=desc, offset=4096,
shape=(480,640), order='C')
red = mm['r']
green = mm['g']
blue = mm['b']
An other thing you may commonly want to do is coverting between numpy
uint8 arrays and raw strings. This is done using the methods
numpy.fromstring and numpy.tostring.
# reading from file to raw string
rstr = mm.tostring()
# writing raw string to file
mm[:] = numpy.fromstring(rstr, dtype=numpy.uint8)
mm.sync()
--
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Re: Windows build of PostgreSQL library for 2.5
On 30 May, 15:42, Frank Millman [EMAIL PROTECTED] wrote: On May 30, 4:15 pm, Ben Sizer [EMAIL PROTECTED] wrote: I've been looking for a Windows version of a library to interface to PostgreSQL, but can only find ones compiled under Python version 2.4. Is there a 2.5 build out there? Is this what you are looking for? http://stickpeople.com/projects/python/win-psycopg/ It may well be, thanks. -- Ben Sizer -- http://mail.python.org/mailman/listinfo/python-list
Creating a distro of python... What would you include in it?
I am creating a distro of Python to be licensed as GPL am wondering, what would anyone suggest as to 3rd party modules being put into it (non-commercial of course!)? I know I'd put MySQLdb into it at the very least. Any suggestions? Thanks, Fark Simmons [insert clever tagline here /] -- http://mail.python.org/mailman/listinfo/python-list
Re: Is PEP-8 a Code or More of a Guideline?
+1 QOTW On Wed, 30 May 2007 06:18:36 GMT, Tim Roberts [EMAIL PROTECTED] wrote: Frank Swarbrick [EMAIL PROTECTED] wrote: Then you'd really love COBOL! :-) Frank COBOL programmer for 10+ years Hey, did you hear about the object-oriented version of COBOL? They call it ADD ONE TO COBOL. -- http://mail.python.org/mailman/listinfo/python-list
Anyone else has seen forrtl: error (200) ...
Hello, Ctrl+C is not passed to the interpreter (i guess it) while I'm executing a script. Instead i get: forrtl: error (200): program aborting due to control-C event If I start python in interactive mode Ctrl+C is passed: bash-3.2$ python Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on win 32 Type help, copyright, credits or license for more information. raw_input() Traceback (most recent call last): File stdin, line 1, in module KeyboardInterrupt Any idea ? Thanks Alexander -- http://mail.python.org/mailman/listinfo/python-list
Call for Ruby Champion !!
Hello friends! I am looking for a Ruby Champion to lead the race in Website development within Java environment... Who loves programming, with new techniques as well as old. Who also enjoys hand coding open source technologies with in-depth knowledge of statistical methods Has a practical approach when it comes to problem solving And aspires a team spirit to be agile... It's very useful to have other programming languages and paradigms About Client: Young Company, fastest growing in the web market This is a permanent role in central London, paying as per market rate for the excellent candidate About Me: I am a Resourcing Consultant specialist in recruiting for Open Source Technologies. please do not hesitate to speak to me or write me back ! Really appreciable for a word of mouth with our friends !!! Cheers, Srini -- http://mail.python.org/mailman/listinfo/python-list
Re: Is PEP-8 a Code or More of a Guideline?
John DeRosa wrote: +1 QOTW Hey, did you hear about the object-oriented version of COBOL? They call it ADD ONE TO COBOL. actually it is ADD 1 TO COBOL GIVING COBOL http://en.wikipedia.org/wiki/COBOL#Aphorisms_and_humor_about_COBOL -- http://mail.python.org/mailman/listinfo/python-list
How can an Exception pass over an except clause ?
I'm using the contract.py library, running Python 2.4.4. Now I'm confronted with the following exception backtrace: (...) File /usr/lib/python2.4/site-packages/contract.py, line 1265, in _check_preconditions p = f.__assert_pre AttributeError: 'function' object has no attribute '__assert_pre' For my surprise, I found that the code of contract.py around line 1265 looks like: 1264: try: 1265: p = f.__assert_pre 1266: except AttributeError: 1267: pass I'd expect line 1267 to swallow the AttributeError siliently. But the application stops with the above backtrace. Someone familiar enough with the Python innards ? How can one manage that an except seems to be ignored ? Ruben -- http://mail.python.org/mailman/listinfo/python-list
Re: New-style classes and special methods
Yes, special methods populate the slots in the structures which Python uses to represent types. Objects/typeobject.c in the Python source distribution does the hard work, particularly in function type_new Thanks for that quick response. I am quite comfortable with C code and am trying to understand exactly what happens when a new-style class is created, and then instantiated. I have been reading typeobject.c and type_new() inside it in detail, and there are a few issues I am trying to figure out. I can see a lot of *SLOT() macros in the file that seem to set the slots to appropriate values. What I am having trouble figuring out is the connection i.e. at what point during construction of the class object in type_new() are those slots allotted? Is it the tp_alloc() function which does this? Is there some kind of descriptor or other mechanism connecting special method names with their slots in the object representation? (e.g. __call__ with type-tp_call) Also, what happens when a class inherits from multiple classes with their own __call__ methods? Where and how is it decided which __call__ goes into the tp_call slot? I'm sure I'll eventually figure it out if I stare at the code hard enough, but would totally appreciate any help I can get :) Thanks again! Raj -- http://mail.python.org/mailman/listinfo/python-list
Re: Is PEP-8 a Code or More of a Guideline?
Using camel case instead of the under_score means less typing. I am lazy. fooBar foo_bar -- http://mail.python.org/mailman/listinfo/python-list
Re: Call for Ruby Champion !!
IT Recruiter wrote: Hello friends! I am looking for a Ruby Champion to lead the race in Website development within Java environment... Who loves programming, with new techniques as well as old. Who also enjoys hand coding open source technologies with in-depth knowledge of statistical methods Has a practical approach when it comes to problem solving And aspires a team spirit to be agile... It's very useful to have other programming languages and paradigms About Client: Young Company, fastest growing in the web market This is a permanent role in central London, paying as per market rate for the excellent candidate About Me: I am a Resourcing Consultant specialist in recruiting for Open Source Technologies. please do not hesitate to speak to me or write me back ! Really appreciable for a word of mouth with our friends !!! Cheers, Srini Boy have you got the wrong vampire ;) -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
Re: Anyone else has seen forrtl: error (200) ...
On May 30, 9:33 am, Alexander Eisenhuth [EMAIL PROTECTED] wrote: Hello, Ctrl+C is not passed to the interpreter (i guess it) while I'm executing a script. Instead i get: forrtl: error (200): program aborting due to control-C event If I start python in interactive mode Ctrl+C is passed: bash-3.2$ python Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit (Intel)] on win 32 Type help, copyright, credits or license for more information. raw_input() Traceback (most recent call last): File stdin, line 1, in module KeyboardInterrupt Any idea ? Thanks Alexander Forrtl indicates that your script is running a Fortran library or program. Remember that Python exceptions only apply during Python. If a Fortran DLL performs a divide-by-zero error, or accesses invalid memory, it will kill the interpreter instead of throwing a Python exception. With Compaq Visual Fortran, the Fortran library calls can kill your entire program if a function receives an invalid value. (Try raising a negative real number to a fractional exponent, for example.) I'd guess that the Fortran code is intercepting the CTRL-C signal and killing the running script. Without knowing anything about your script and the library calls it makes, I can't give you much advice. There may be little that you can do, especially if you don't have the Fortran source code in question and/or can't recompile it. Maybe someone with some Fortran/Python experience can assist you. --Jason -- http://mail.python.org/mailman/listinfo/python-list
Re: Is PEP-8 a Code or More of a Guideline?
On May 30, 12:36 am, Hendrik van Rooyen [EMAIL PROTECTED] wrote: Maric Michaud [EMAIL PROTECTED] wrote: Typist is fine, although MCP that I am, I tend to think of typist as female... - Hendrik What does being a Microsoft Certified Professional(MCP) have to do with thinking of a typist as female? =) -- http://mail.python.org/mailman/listinfo/python-list
Re: Creating a distro of python... What would you include in it?
On 30 May, 16:25, [EMAIL PROTECTED] wrote: I am creating a distro of Python to be licensed as GPL am wondering, what would anyone suggest as to 3rd party modules being put into it (non-commercial of course!)? I know I'd put MySQLdb into it at the very least. Any suggestions? What you put in it will depend on what it's for. Which platforms will you support? Many Linux distros already provide comprehensive package management systems, so developers on those would probably be better off using the native package manager unless you're offering something distinctive. Does your distro target a particular developer community, such as web developers, database developers or desktop developers? These communities have very different requirements, but then again if you target web developers do you include Turbo Gears, or Django or both? Do you include an ORM and if so which one? If you can clarify what you are trying to achieve, or what defiiciencies in the existing distros that you're finding limiting then that would realy help. Super-distros can definitely have a place. In fact that's exactly what TurboGears is, but it has a very clear mission statement and adds significant value of it's own. It also acts as an add-on to the standard distro rather than an alternative and I recommend you consider that strategy. Simon Hibbs -- http://mail.python.org/mailman/listinfo/python-list
Re: How can an Exception pass over an except clause ?
Nebur wrote: I'm using the contract.py library, running Python 2.4.4. Now I'm confronted with the following exception backtrace: (...) File /usr/lib/python2.4/site-packages/contract.py, line 1265, in _check_preconditions p = f.__assert_pre AttributeError: 'function' object has no attribute '__assert_pre' For my surprise, I found that the code of contract.py around line 1265 looks like: 1264: try: 1265: p = f.__assert_pre 1266: except AttributeError: 1267: pass I'd expect line 1267 to swallow the AttributeError siliently. But the application stops with the above backtrace. Someone familiar enough with the Python innards ? How can one manage that an except seems to be ignored ? Ruben Under any normal circumstances, that code can't produce that error. The attribute error will be swallowed by the except clause. However by being *VERY* perverse, I was able to reproduce the above error by overwriting AttributeError with some other exception class (say SyntaxError): AttributeError = SyntaxError Then your code will be will produce a real AttributeError, but miss it because (despite the spelling) it checks for a SyntaxError, Question... I don't know what contract.py is, but could it be doing something that *bad*? You could check py printing AttributeError and see what it really is. In my case it's: print AttributeError exceptions.SyntaxError Gary Herron P.S.: Anyone who does this kind of thing is a danger to society. May their finger fall off before they get a chance to distribute such a program. -- http://mail.python.org/mailman/listinfo/python-list
Re: How can an Exception pass over an except clause ?
Nebur wrote: I'm using the contract.py library, running Python 2.4.4. Now I'm confronted with the following exception backtrace: (...) File /usr/lib/python2.4/site-packages/contract.py, line 1265, in _check_preconditions p = f.__assert_pre AttributeError: 'function' object has no attribute '__assert_pre' For my surprise, I found that the code of contract.py around line 1265 looks like: 1264: try: 1265: p = f.__assert_pre 1266: except AttributeError: 1267: pass I'd expect line 1267 to swallow the AttributeError siliently. But the application stops with the above backtrace. Someone familiar enough with the Python innards ? How can one manage that an except seems to be ignored ? Ruben The 'raise' in line 1271 re-raises the last error instead of the exception in whose block it is called. This: try: raise KeyError except: try: raise IndexError except: pass raise raises IndexError, not KeyError. -- Regards, Tijs -- http://mail.python.org/mailman/listinfo/python-list
Re: Anyone else has seen forrtl: error (200) ...
Alexander Eisenhuth wrote: Hello, Ctrl+C is not passed to the interpreter (i guess it) while I'm executing a script. Instead i get: forrtl: error (200): program aborting due to control-C event I don't know what forrtl is, but I think it is hijacking your SIGINT signal handler. Python installs an OS-level signal handler that raises the KeyboardInterrupt in the main thread. If a library installs its own handler, Python won't catch it. -- Regards, Tijs -- http://mail.python.org/mailman/listinfo/python-list
Re: google maps api for py?
I see that the weapon of choice for google maps is javascript... Is
there anything for python?
I wrote the following for finding the latitude/longitude of a
location. You need to set the variable 'key' to the actual key you got
from google.
(Indentation might get mixed up on the way.)
HTH,
Daniel
###
# gmaps.py
###
import urllib
from time import sleep
key = here_goes_your_key
def location2latlong( query, key=key ):
Get the ( latitute, longitude ) coordinates corresponding
to the query. If something goes wrong return None.
output = 'csv'
params = { }
params[ 'key' ] = key
params[ 'output' ] = output
params[ 'q' ] = query
params = urllib.urlencode( params )
try:
f = urllib.urlopen( http://maps.google.com/maps/geo?%s; % params )
except IOError:
# maybe some local problem at google? let's try again
sleep( 3 )
try:
f = urllib.urlopen( http://maps.google.com/maps/geo?%s; % params )
except IOError:
# okay we give up
return None
response = f.read( ).split(',')
f.close( )
try:
status = response[0]
accuracy = response[1]
latitude = response[2]
longitude = response[3]
except:
return None
if status != '200':
return None
else:
return latitude, longitude
if __name__ == '__main__':
import sys
try:
q = sys.argv[1]
except:
print 'Usage: python gmaps.py query'
sys.exit( 1 )
r = location2latlong( q )
if r is not None:
print r
else:
print 'Something went wrong.'
###
###
--
http://mail.python.org/mailman/listinfo/python-list
Re: Creating a distro of python... What would you include in it?
On 30 May 2007 08:25:48 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I am creating a distro of Python to be licensed as GPL am wondering, what would anyone suggest as to 3rd party modules being put into it (non-commercial of course!)? I know I'd put MySQLdb into it at the very least. Any suggestions? If your distro is to be GPL-licensed, does that mean that you want your components to be GPL too? If so, the number of components you can select is reduced drastically. I'd like a distro with a good IDE, GUI toolkit (PyGTK for example), Django and PyGame. Something you could point a newbie to and they would be able to create real applications with, without needing to download hundreds of dependencies. -- mvh Björn -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter Listbox - Different Text colors in one listbox
On May 30, 6:04 am, [EMAIL PROTECTED] wrote: On May 29, 2:02 pm, [EMAIL PROTECTED] wrote: Hi, Is it possible to havedifferentitems in alistboxindifferentcolors? Or is it justonecolor for all items in alistbox? Thanks Rahul from Tkinter import * root = Tk() l = Listbox(root) l.pack() for x in range(10): l.insert(END, x) l.itemconfig(2, bg='red', fg='white') l.itemconfig(4, bg='green', fg='white') l.itemconfig(5, bg='cyan', fg='white') root.mainloop() You can _only_ configurate 'background', 'foreground', 'selectbackground', 'selectforegroud', not font :( HTH Thanks for the feedback all. I tried the itemconfig method and it works great. Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: writing to a file
On May 30, 4:53 pm, sturlamolden [EMAIL PROTECTED] wrote: However, numpy has a properly working memory mapped array class, numpy.memmap. It seems that NumPy's memmap uses a buffer from mmap, which makes both of them defunct for large files. Damn. mmap must be fixed. -- http://mail.python.org/mailman/listinfo/python-list
Re: Creating a distro of python... What would you include in it?
This is for Windows only, but since your target audience is newbies, that might be fine. Python Sumo-Distribution for Windows - Freely downloadable Python distributions for Windows with many extra packages already installed and ready for use. -- http://code.enthought.com/enthon/ BJörn Lindqvist wrote: On 30 May 2007 08:25:48 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: I am creating a distro of Python to be licensed as GPL am wondering, what would anyone suggest as to 3rd party modules being put into it (non-commercial of course!)? I know I'd put MySQLdb into it at the very least. Any suggestions? If your distro is to be GPL-licensed, does that mean that you want your components to be GPL too? If so, the number of components you can select is reduced drastically. I'd like a distro with a good IDE, GUI toolkit (PyGTK for example), Django and PyGame. Something you could point a newbie to and they would be able to create real applications with, without needing to download hundreds of dependencies. -- Shane Geiger IT Director National Council on Economic Education [EMAIL PROTECTED] | 402-438-8958 | http://www.ncee.net Leading the Campaign for Economic and Financial Literacy begin:vcard fn:Shane Geiger n:Geiger;Shane org:National Council on Economic Education (NCEE) adr:Suite 215;;201 N. 8th Street;Lincoln;NE;68508;United States email;internet:[EMAIL PROTECTED] title:IT Director tel;work:402-438-8958 x-mozilla-html:FALSE url:http://www.ncee.net version:2.1 end:vcard -- http://mail.python.org/mailman/listinfo/python-list
Re: Is PEP-8 a Code or More of a Guideline?
Joe Riopel wrote: Using camel case instead of the under_score means less typing. I am lazy. fooBar foo_bar camel case makes source code extremely ugly in weird disturbing way YMMV -- http://mail.python.org/mailman/listinfo/python-list
Help with ctypes and PAM
Hello, I've been trying to write a PAM module using ctypes. In the conversation function (my_conv in the script below), you're passed in a pam_response** pointer. You're supposed to allocate an array of pam_response's and set the pointer's value to the new array. Then you fill in the array with appropriate data. I can't seem to get it working in python...The authenticate function always returns PAM_AUTHTOK_RECOVER_ERR (21), which I think means the response doesn't make any sense. I've tried saving the response array outside of my_conv to make sure it doesn't get garbage collected, but that doesn't seem to help. Any pointers would be appreciated! Cheers, Chris from ctypes import * libpam = CDLL(libpam.so) class pam_handle(Structure): _fields_ = [ (handle, c_void_p) ] def __init__(self): self.handle = 0 class pam_message(Structure): _fields_ = [ (msg_style, c_int), (msg, c_char_p), ] def __repr__(self): return pam_message %i '%s' % (self.msg_style, self.msg) class pam_response(Structure): _fields_ = [ (resp, c_char_p), (resp_retcode, c_int), ] def __repr__(self): return pam_response %i '%s' % (self.resp_retcode, self.resp) conv_func = CFUNCTYPE(c_int, c_int, POINTER(POINTER(pam_message)), POINTER(POINTER(pam_response)), c_void_p) class pam_conv(Structure): _fields_ = [ (conv, conv_func), (appdata_ptr, c_void_p) ] pam_start = libpam.pam_start pam_start.restype = c_int pam_start.argtypes = [c_char_p, c_char_p, POINTER(pam_conv), POINTER(pam_handle)] pam_authenticate = libpam.pam_authenticate pam_authenticate.restype = c_int pam_authenticate.argtypes = [pam_handle, c_int] if __name__ == __main__: import getpass, os, sys @conv_func def my_conv(nMessages, messages, pResponse, appData): # Create an array of nMessages response objects # Does r get GC'ed after we're all done? r = (pam_response * nMessages)() pResponse.contents = cast(r, POINTER(pam_response)) for i in range(nMessages): if messages[i].contents.msg == Password: : p = getpass.getpass() pResponse.contents[0].resp_retcode = 0 pResponse.contents[0].resp = p return 0 handle = pam_handle() c = pam_conv(my_conv, 0) retval = pam_start(login, os.getlogin(), pointer(c), pointer(handle)) if retval != 0: print Couldn't start pam session sys.exit(-1) retval = pam_authenticate(handle, 0) if retval == 21: print Authentication information cannot be recovered sys.exit(-1) print retval -- http://mail.python.org/mailman/listinfo/python-list
Re: print bypasses calling write method for objects inheriting from file?
En Wed, 30 May 2007 04:24:30 -0300, Peter Otten [EMAIL PROTECTED] escribió: I created an object that inherits from file and was a bit surprised to find that print seems to bypass the write method for objects inheriting from file. An optimization I suppose. Does this surprise anyone else at all or am I missing something? No, your analysis is correct, though I'd consider optimization an euphemism for bug here. Noone was annoyed enough to write a patch, it seems. A one-line patch, I guess, PyFile_CheckExact instead of PyFile_Check. Or a few lines, checking if the write method is still the builtin one. As this is the third time I see this question I'll try to submit the patch. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.5 and WXPython demo's
On May 30, 12:24 pm, Steve Holden [EMAIL PROTECTED] wrote: Andrew P wrote: Hello, I am new (very) to Python and have just down loaded the latest version of Python (2.5) and WXPython (2.8). For some reason I cannot get the WXPython demo to run at all. I run windows XP and it can't find a program to run the demo. Any advice? (apologies if this has been posted before). The demo is a separate download nowadays. Do you mean you just can't find it, or are you running it and does it give you some error message that you feel we shouldn't be told about? A little more information, please ... regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden -- Asciimercial - Get on the web: Blog, lens and tag your way to fame!! holdenweb.blogspot.comsquidoo.com/pythonology tagged items: del.icio.us/steve.holden/python All these services currently offer free registration! -- Thank You for Reading Thanks for your reply, this is what I get when I click on the WXPthon Icon: Python Traceback Shell Stating: Error getting traceback - cant import tracebackImportError: No module named pywin.framework.startup The Icon is the older python snake icon not the new coloured icon. Thanks Andrew. -- http://mail.python.org/mailman/listinfo/python-list
