Re: scanning under windows WIA with custom settings (dpi / etc )
News123 wrote:
Hi,
I'm trying to scan a document from a python 2.6 script without user
interaction.
I found a code snippet, that allows me to scan under Vista, but that
doesn't allow me to select the dpi / color mode / etc.
I'm still stuck.
I'll try to look at any solution (visual C++, C#, Basic) first.
Then it's perhaps easier to pythonize it via python .net.
However I don't know whether python .net exists for 2.6 and whether it
is stable enough.
N
The snippet uses win32com.client
# # script start
import win32com.client,os
WIA_IMG_FORMAT_PNG = {B96B3CAF-0728-11D3-9D7B-F81EF32E}
WIA_COMMAND_TAKE_PICTURE = {AF933CAC-ACAD-11D2-A093-00C04F72DC3C}
os.chdir('c:/temp')
wia = win32com.client.Dispatch(WIA.CommonDialog)
dev = wia.ShowSelectDevice()
for command in dev.Commands:
if command.CommandID==WIA_COMMAND_TAKE_PICTURE:
foo=dev.ExecuteCommand(WIA_COMMAND_TAKE_PICTURE)
i=1
for item in dev.Items:
if i==dev.Items.Count:
image=item.Transfer(WIA_IMG_FORMAT_PNG)
break
i=i+1
image.SaveFile(test.png)
# script end
My problems are:
- This script works fine for me under Windows 7, however I'm
unable to specify additional parameters, like dpi and
color mode.
- The script doesn't work under windows XP, though the scanner driver is
installed. (Gimp finds the scanner (as WIA scanner)).
Perhaps 'WIA.CommonDialig' has another name or I need to install some DLL.
The error message is:
Traceback (most recent call last):
File C:\work\python\minidemos\wia_get_simple.py, line 7, in module
wia = win32com.client.Dispatch(WIA.CommonDialog)
File C:\Python26\lib\site-packages\win32com\client\__init__.py, line
95, in Dispatch
dispatch, userName =
dynamic._GetGoodDispatchAndUserName(dispatch,userName,clsctx)
File C:\Python26\lib\site-packages\win32com\client\dynamic.py, line
104, in _GetGoodDispatchAndUserName
return (_GetGoodDispatch(IDispatch, clsctx), userName)
File C:\Python26\lib\site-packages\win32com\client\dynamic.py, line
84, in _GetGoodDispatch
IDispatch = pythoncom.CoCreateInstance(IDispatch, None, clsctx,
pythoncom.IID_IDispatch)
com_error: (-2147221005, 'Invalid class string', None, None)
-
As I have no knowledge of Win32com and WIA I would appreciate some help
or good documentation about wincom32 / WIA with python
thanks for your help and bye
N
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Re: CentOS 5.3 vs. Python 2.5
On Tue, 24 Nov 2009 22:42:28 -0800, John Nagle wrote: My dedicated hosting provider wants to switch me to a new server with CentOS 5.3, so I have to look at how much work is required. CentOS 5.3 apparently still ships with Python 2.4. Worse, it requires Python 2.4 for its own internal purposes, and actually installing Python 2.5 breaks the package manager. There's no supported RPM for upgrading. It's apparently necessary to build Python 2.5 from source, build all the packages, and debug. You shouldn't need *quite* that much effort, particularly if you don't care about tkinter. Just use the alternate installation so it doesn't stomp all over the 2.4 installation: .configure make make altinstall You will need root or sudo for that last one. I don't have Centos 5.3, but I have Centos 5, and it seems to work fairly easily for me: $ wget http://www.python.org/ftp/python/2.5.4/Python-2.5.4.tgz ... 18:39:11 (69.6 KB/s) - `Python-2.5.4.tgz' saved [11604497/11604497] $ $ tar xzf Python-2.5.4.tgz $ cd Python-2.5.4 $ ./configure ... $ make ... $ sudo make altinstall Password: ... $ python -V Python 2.4.3 $ python2.5 -V Python 2.5.4 And it all seems to just work for me. Nor does that just work. There's documentation, but some of it is in Japanese. http://blog.bashton.com/2008/python-25-rpms-for-rhel-5-centos-5/ I don't understand why you're using documentation for third-party RPMs as evidence that building from source will be troublesome. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Beginning Question about Python functions, parameters...
astral orange a écrit : On Nov 23, 10:37 pm, r rt8...@gmail.com wrote: (snip) This is a horrible example to show noobs. I think the OP could better understand this as a class EVEN though the OP may or may not know what a class *is* yet. class Name(): def __init__(self, first, middle, last): self.first = first self.middle = middle self.last = last (snip) As for the class Name(): example above? Even though I haven't seen exactly what purpose 'self' serves It's a reference to the current Name instance. But while technically correct, I'm sure such this kind of explanation really helps :-/ -- http://mail.python.org/mailman/listinfo/python-list
How to import a file by its full path using C api?
Hello PyObject* PyImport_ImportModule( const char *name) How to specify a full file path instead and a module name? Like PyImport_SomeFunction(const char *path_to_script, const char *name) Thanks, Elias -- http://mail.python.org/mailman/listinfo/python-list
Re: CentOS 5.3 vs. Python 2.5
On Nov 25, 8:13 am, Steven D'Aprano ste...@remove.this.cybersource.com.au wrote: On Tue, 24 Nov 2009 22:42:28 -0800, John Nagle wrote: My dedicated hosting provider wants to switch me to a new server with CentOS 5.3, so I have to look at how much work is required. CentOS 5.3 apparently still ships with Python 2.4. Worse, it requires Python 2.4 for its own internal purposes, and actually installing Python 2.5 breaks the package manager. There's no supported RPM for upgrading. It's apparently necessary to build Python 2.5 from source, build all the packages, and debug. You shouldn't need *quite* that much effort, particularly if you don't care about tkinter. Just use the alternate installation so it doesn't stomp all over the 2.4 installation: .configure make make altinstall You will need root or sudo for that last one. I don't have Centos 5.3, but I have Centos 5, and it seems to work fairly easily for me: $ wgethttp://www.python.org/ftp/python/2.5.4/Python-2.5.4.tgz ... 18:39:11 (69.6 KB/s) - `Python-2.5.4.tgz' saved [11604497/11604497] $ $ tar xzf Python-2.5.4.tgz $ cd Python-2.5.4 $ ./configure ... $ make ... $ sudo make altinstall Password: ... $ python -V Python 2.4.3 $ python2.5 -V Python 2.5.4 And it all seems to just work for me. Nor does that just work. There's documentation, but some of it is in Japanese. http://blog.bashton.com/2008/python-25-rpms-for-rhel-5-centos-5/ I don't understand why you're using documentation for third-party RPMs as evidence that building from source will be troublesome. -- Steven And might I add on a box where there is no root access, but sufficient tools (compilers etc...) 1) Compile from source 2) Set PYTHONPATH correctly for your shell 3) Set your normal path to include your Python rather than the system's default Python 4) When installing modules (via setup.py install or easy_install) include a home_dir= (I think that's right OTTOMH) to somewhere in your home directory, and make sure step 2) complies with this. 5) Double check with which python to make sure it's the correct version. hth Jon. -- http://mail.python.org/mailman/listinfo/python-list
Re: Can self crush itself?
Then how can we destroy the 3rd instance, right after its creation and from inside class Moo code? class Moo: cnt = 0 def __init__(self, x): self.x = x self.__class__.cnt += 1 if self.__class__.cnt 2: print id(self) ## 13406816 ## in what dict is this ID? ## and can we delete it from there? ## ??? f = Moo(1) g = Moo(2) h = Moo(3) print h -- http://mail.python.org/mailman/listinfo/python-list
Re: Can self crush itself?
On Wed, Nov 25, 2009 at 1:46 AM, n00m n...@narod.ru wrote: Then how can we destroy the 3rd instance, right after its creation and from inside class Moo code? Why would you want to do that in the first place? It's strange to say the least. If you want to prevent an instance being created in the first place, you can override __new__(). Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: attributes, properties, and accessors -- philosophy
Ethan Furman a écrit : Let's head towards murkier waters (at least murkier to me -- hopefully they can be easily clarified): some of the attributes are read-only, such as record count; others are not directly exposed, but still settable, such as table version; and still others require a small amount of processing... at which point do I switch from simple attribute access to method access? Short answer : you don't !-) Long answer : well, in fact you do, but the client code doesn't have to be aware that it's in fact calling an accessor. Before we go into more details, you have to know that Python has a pretty good support for computed attributes, with both a simple generic solution (the property type) and the full monty (custom types implementing the descriptor protocol). So from the interface POV, you should never have an explicit accessor method for what is semantically an attribute (wheter the attribute is a plain or a computed one being part of the implementation). Let's start with your second point: not directly exposed but still settable. I assume you mean not part of the interface, only supposed to be accessed (rw) from the methods - if not, please pardon my stupidity and provide better explanations !-). If yes: Python doesn't have language inforced access restrictions (private / protected / etc), but a *very strong* naming convention which is that names starting with a leading underscore are implementation details, not part of the official interface, and shouldn't be accessed directly. Kind of a warranty voided if unsealed. So if you have attributes you don't want to expose to the outside world, just add a single leading underscore to their names. First and third points are solved by using computed attributes - usually a property. The property type takes a few accessor functions as arguments - typically, a getter and a setter, and eventually a deleter. Used as a class attribute, a property instance will hook up into the attribute lookup / setup mechanism (__getattribute__ and __setattr__), and will call resp. it's getter or setter function, passing it the instance and (for the setter) value. This directly solves the third point. For the first one, the obvious solution is to use a property with a setter that raises an exception - canonically, an AttributeError with a message explaining that the attribute is read-only. And for something more hands-on: class Person(object): def __init__(self, firstname, lastname, birthdate): self.firstname = firstname self.lastname = lastnale self.birthdate = birthdate self._foo = 42 # implementation only def _getfullname(self): return %s %s % (self.firstname, self.lastname) def _setfullname(self, value): raise AttributeError(%s.fullname is read-only % type(self) fullname = property(fget=_getfullname, fset=_setfullname) def _getage(self): return some_computation_with(self.birthdate) def _setage(self, value): raise AttributeError(%s.age is read-only % type(self) age = property(fget=_getage, fset=_setage) For more on computed attributes, you may want to read about the descriptor protocol (google is your friend as usual). This and the attribute resolution mechanism are fundamental parts of Python's inner working. Learn how it works if you really want to leverage Python's power. HTH -- http://mail.python.org/mailman/listinfo/python-list
Re: attributes, properties, and accessors -- philosophy
Ethan Furman a écrit : (snip) Okay, I'll go back and switch all my attributes *back* to attributes -- and properties will be much nicer than my original implementation (using __getattr__ and __setattr__). It will also be faster FWIW. -- http://mail.python.org/mailman/listinfo/python-list
Re: Can self crush itself?
n00m n...@narod.ru writes: Then how can we destroy the 3rd instance, right after its creation and from inside class Moo code? Normally, one binds whatever references one needs, and lets the garbage collector clean them up once they fall out of scope. If the references are living beyond their usefulness, that's probably a sign that your code isn't modular enough; short, focussed functions might help. But this is all diagnosis without seeing the symptoms. Perhaps it's beyond time that you explained what you're trying to achieve that you think “destroy an instance” will help. -- \ “I bought a self learning record to learn Spanish. I turned it | `\on and went to sleep; the record got stuck. The next day I | _o__) could only stutter in Spanish.” —Steven Wright | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: How to log messages _only once_ from all modules ?
Barak, Ron wrote:
Hi,
I'm trying to add the logging module to my application, but I seem to
be missing something.
My application (a wxPython one) has a main script that calls various
helper classes.
I want the log messages from all modules to go to one central log file.
When I implement logging, I think that due to preparation, I get the
same message more than once.
Here's an example:
[snip example]
Could you suggest what should I change in the above scripts so that
the log messages would appear only once ?
Thanks,
Ron.
If you are starting with the logging facility, I would suggest to add
handlers only to the root logger (in your __main__ section).
Basically, never configure or add handlers to any logger except for the
root logger in your __main__ section. There are very few reasons why you
would break this rule. And when you'll be familiar with the logging
module you'll when to break it.
[server.py]
import logging
import logging.handlers
logger = logging.getLogger(__name__) # you'd better to create the logger
at the module level, you may want to log within the module function
def aFunction(a, b, ,c):
logger.debug('You called aFunction')
class Server():
def __init__(self):
self.logger = logger
def util(self):
self.logger.warning('This message comes from Server module ')
[client.py]
import logging
import logging.handlers
from server import Server
logger = logging.getLogger(__name__)
class Client():
def __init__(self):
self.logger = logger
def client_test(self):
self.logger.warning(This message comes from Client module)
if __name__ == __main__:
rootLogger = logging.getLogger()
rootLogger.addHandler(logging.FileHandler(client.log))
rootLogger.handlers[-1].setFormatter(logging.Formatter(%(asctime)s
%(name)-12s %(levelname)-8s %(message)s))
rootLogger.setLevel(logging.DEBUG)
ser = Server()
cli = Client()
ser.util()
cli.client_test()
Happy logging,
Jean-Michel
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Re: pointless musings on performance
Le Tue, 24 Nov 2009 22:08:19 +, Benjamin Peterson a écrit : Would it be worth in-lining the remaining part of PyObject_IsTrue in ceval? Inlining by hand is prone to error and maintainability problems. Which is why we like to do it :-)) -- http://mail.python.org/mailman/listinfo/python-list
Re: pointless musings on performance
Le Tue, 24 Nov 2009 16:09:10 -0800, Paul Boddie a écrit : I'm referring to what you're talking about at the end. The enhancements in Python 3 presumably came about after discussion of threaded interpreters, confirming that the evaluation loop in Python 2 was not exactly optimal. An optimal evaluation loop is a evaluation loop which doesn't get executed at all :-) (which is what unladen-swallow, cython and pypy are trying to do) You need to draw the line between work done by system and external libraries and that done by Python, but a breakdown of the time spent executing each kind of bytecode instruction could be interesting. When you say executing each kind of bytecode instruction, are you talking about the overhead of bytecode dispatch and operand gathering, or the total cost including doing the useful work? Regardless, it probably isn't easy to do such measurements. I once tried using AMD's CodeAnalyst (I have an AMD CPU) but I didn't manage to get any useful data out of it; the software felt very clumsy and it wasn't obvious how to make it take into account the source code of the Python interpreter. Regards Antoine. -- http://mail.python.org/mailman/listinfo/python-list
Help with pprint
Hello, I want to print list of lists in matrix format. So I use pprint with parameter 'width' for this target. For example : data=[[1, 1, 1], [1, 1, 1], [1, 1, 1]] pprint(data,width=20) [[1, 1, 1], [1, 1, 1], [1, 1, 1]] The problem that I don't know how to select width value, because if: data=[['one', 'one', 'one'], ['one', 'one', 'one'], ['one', 'one', 'one']] pprint(data,width=20) [['one', 'one', 'one'], ['one', 'one', 'one'], ['one', 'one', 'one']] -- http://mail.python.org/mailman/listinfo/python-list
(pywin related) pywintypes.com_error: -2147417846 Application busy
Hello list, I'm having a problem with a python COM Excel client that rarely gets the exception pywintypes.com_error with the error code -2147417846. (means Excel is busy) Here the python code of the exception handling: [...] try: # write a excel cell [...] except pywintypes.com_error, ex: if ex[0] == -2147417846: time.sleep(1.0) # retry write? [...] My first approach was to retry the writing to the excel cell. But that ends in a hanging Excel application (probably a deadlock). After a little research I found this post: http://social.msdn.microsoft.com/Forums/en-US/vsto/thread/70ef972b-51b6-4ece-a4af-d6b4e111eea5 [...] If you don't register a MessageFilter yourself (by calling CoRegisterMessageFilter), you will get default behavior which will be to fail the call if it gets rejected. .Net converts the failure HRESULT to an exception. To deal with the possibility of the server being busy when you try to call, you need to implement IMessageFilter::RetryRejectedCall in your client code and also register the message filter. In most cases, you will just need to wait for a few seconds and then retry the call--generally that will be sufficient time to enable Word to finish whatever it is doing so it can handle your call. However, if the instance of Word that you are controlling could possibly visible, you might want to add additional logic to display the OLEUIBUSY dialog after some amount of time has passed to notify the user that you are waiting on Word to do something and give them the opportunity to help the process. For example, as Misha mentions, Word will reject all incoming calls if a modal dialog box is up. Therefore, in that situation, you would be blocked indefinitely until the dialog is dismissed. [...] As this part of the COM API (IMessageFilter, CoRegisterMessageFilter) isn't included in pywin32 I don't see a possibility to do that, or? Did anybody else have to deal with that problem? Any hints are very welcome. Regards Alexander -- http://mail.python.org/mailman/listinfo/python-list
Re: (pywin related) pywintypes.com_error: -2147417846 Application busy
Hi! Your computer is too slow, for launch Excel. Configure the machine for more speed... @+ -- MCI -- http://mail.python.org/mailman/listinfo/python-list
Re: Raw strings as input from File?
On Nov 25, 3:31 am, Grant Edwards inva...@invalid.invalid wrote:
On 2009-11-25, Rhodri James rho...@wildebst.demon.co.uk wrote:
On Tue, 24 Nov 2009 21:20:25 -, utabintarbo utabinta...@gmail.com
wrote:
On Nov 24, 3:27 pm, MRAB pyt...@mrabarnett.plus.com wrote:
.readlines() doesn't change the \10 in a file to \x08 in the string
it returns.
Could you provide some code which shows your problem?
Here is the code block I have so far:
for l in open(CONTENTS, 'r').readlines():
f = os.path.splitext(os.path.split(l.split('-')[0]))[0]
if f in os.listdir(DIR1) and os.path.isdir(os.path.join(DIR1,f)):
shutil.rmtree(os.path.join(DIR1,f))
if f in os.listdir(DIR2) and os.path.isdir(os.path.join(DIR2,f)):
shutil.rmtree(os.path.join(DIR2,f))
Ahem. This doesn't run. os.path.split() returns a tuple, and calling
os.path.splitext() doesn't work. Given that replacing the entire loop
contents with print l readily disproves your assertion, I suggest you
cut and paste actual code if you want an answer. Otherwise we're just
going to keep saying No, it doesn't, because no, it doesn't.
It's, um, rewarding to see my recent set of instructions being
followed.
A minimally obfuscated line from the log file:
K:\sm\SMI\des\RS\Pat\10DJ\121.D5-30\1215B-B-D5-BSHOE-MM.smz-/arch_m1/
smi/des/RS/Pat/10DJ/121.D5-30\1215B-B-D5-BSHOE-MM.smz ; t9480rc ;
11/24/2009 08:16:42 ; 1259068602
What I get from the debugger/python shell:
'K:\\sm\\SMI\\des\\RS\\Pat\x08DJQ.D5-30Q5B-B-D5-BSHOE-MM.smz-/arch_m1/
smi/des/RS/Pat/10DJ/121.D5-30/1215B-B-D5-BSHOE-MM.smz ; t9480rc ;
11/24/2009 08:16:42 ; 1259068602'
When you do what, exactly?
;)
--
Grant
Can't remember if this thread counts as Edwards' Law 5[b|c] :)
I'm sure I pinned it up on my wall somewhere, right next to
http://imgs.xkcd.com/comics/tech_support_cheat_sheet.png
Jon.
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Re: (pywin related) pywintypes.com_error: -2147417846 Application busy
I don't think so, because it happens very rarely Michel Claveau - MVP schrieb: Hi! Your computer is too slow, for launch Excel. Configure the machine for more speed... @+ -- http://mail.python.org/mailman/listinfo/python-list
'classmethod' object has only read-only attributes
Hi,
why have classmethods only readonly attributes? It works for other methods.
exmpale code:
{{{
class Foo(object):
@classmethod
def bar(cls):
pass
bar.myattr='test'
}}}
u...@host:~ python ~/tmp/t.py
Traceback (most recent call last):
File /home/user/tmp/t.py, line 1, in module
class Foo(object):
File /home/user/tmp/t.py, line 5, in Foo
bar.myattr='test'
TypeError: 'classmethod' object has only read-only attributes (assign to
.myattr)
--
Thomas Guettler, http://www.thomas-guettler.de/
E-Mail: guettli (*) thomas-guettler + de
--
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Re: How to import a file by its full path using C api?
Looks like one way to do that is to use something like:
s.sprintf(
import imp\n
imp.load_source('%s', r'%s'), modname, script_path);
PyRun_SimpleString(s.c_str());
Unless someone has a better suggestion.
Regards,
Elias
lallous lall...@lgwm.org wrote in message news:heir4g$oh...@aioe.org...
Hello
PyObject* PyImport_ImportModule( const char *name)
How to specify a full file path instead and a module name?
Like PyImport_SomeFunction(const char *path_to_script, const char *name)
Thanks,
Elias
--
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Re: 'classmethod' object has only read-only attributes
Thomas Guettler wrote:
Hi,
why have classmethods only readonly attributes? It works for other
methods.
exmpale code:
{{{
class Foo(object):
@classmethod
def bar(cls):
pass
bar.myattr='test'
}}}
u...@host:~ python ~/tmp/t.py
Traceback (most recent call last):
File /home/user/tmp/t.py, line 1, in module
class Foo(object):
File /home/user/tmp/t.py, line 5, in Foo
bar.myattr='test'
TypeError: 'classmethod' object has only read-only attributes (assign to
.myattr)
No idea. But here's a workaround:
class A(object):
... def method(cls): print cls
... method.foo = 42
... method = classmethod(method)
...
A.method()
class '__main__.A'
A.method.foo
42
Or, going fancy:
def attrs(**kw):
... def set(obj):
... for k, v in kw.iteritems():
... setattr(obj, k, v)
... return obj
... return set
...
class A(object):
... @classmethod
... @attrs(foo=42)
... def method(cls): print cls
...
A.method()
class '__main__.A'
A().method.foo
42
Peter
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Re: Beginning Question about Python functions, parameters...
astral orange wrote: As for the class Name(): example above? Even though I haven't seen exactly what purpose 'self' serves In many other programming language, self (or this, or Me) refers the the current class instance. In some languages, you can refer to an instance attribute without an explicit self, this, or Me; the name resolver will search in the local namespace (method-level), instance namespace (instance-level), class namespace (class-level), perhaps module level namespace (file-level), and finally global (application level). Python interpreter is simple and stupid. It doesn't have many smarts; instead of having such a sophisticated name resolver, the compiler passes an argument to the function, making `self` a local variable that refers to the current instance. Python programmers accesses instance and class namespace by explicitly referring to `self`; the name resolver only have two places to lookup names: local namespace (method level) and global namespace (module-level [!] not application level in python). This choice of design simplifies the name resolver, simplifies method/function object design (since it does not need any code to handle an otherwise implicit self), and completely eliminates ambiguity (to the programmer) when having a local variable with the same name as an instance variable. Among many other advantages. The side-effect of this design choice is self must be explicitly referenced to access class/instance attributes; unlike in some other language where self/this/Me may be omitted when it doesn't clash with other variable in local namespace. -- http://mail.python.org/mailman/listinfo/python-list
Workaround To Add Value To TextArea
Hi; I've noticed that html doesn't support a value attribute for textarea. I have a form in which I enable users to edit data they've entered into my database, and one of the data is a textarea. How do I fill the textarea with the value, or what kind of workaround can I create? TIA, Victor -- http://mail.python.org/mailman/listinfo/python-list
Re: Workaround To Add Value To TextArea
Rami Chowdhury Never assume malice when stupidity will suffice. -- Hanlon's Razor 408-597-7068 (US) / 07875-841-046 (UK) / 0189-245544 (BD) On Wed, Nov 25, 2009 at 07:19, Victor Subervi victorsube...@gmail.com wrote: Hi; I've noticed that html doesn't support a value attribute for textarea. I have a form in which I enable users to edit data they've entered into my database, and one of the data is a textarea. How do I fill the textarea with the value, or what kind of workaround can I create? Hi Victor, You'll find the textarea and input tags differ significantly, even though they're both typically used in HTML forms. The W3C page has a fair overview of how various parts of HTML forms work in HTML 4.01, and it's roughly accurate for XHTML up to 1.1 as well: http://www.w3.org/TR/html401/interact/forms.html HTH, Rami -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Workaround To Add Value To TextArea
On Wed, Nov 25, 2009 at 10:27 AM, Rami Chowdhury rami.chowdh...@gmail.comwrote: You'll find the textarea and input tags differ significantly, even though they're both typically used in HTML forms. The W3C page has a fair overview of how various parts of HTML forms work in HTML 4.01, and it's roughly accurate for XHTML up to 1.1 as well: http://www.w3.org/TR/html401/interact/forms.html Oops. Silly mistake. Thought I had to put the value inside the tag like the other tags. Thanks, V -- http://mail.python.org/mailman/listinfo/python-list
Re: attributes, properties, and accessors -- philosophy
Bruno Desthuilliers wrote: Ethan Furman a écrit : Let's head towards murkier waters (at least murkier to me -- hopefully they can be easily clarified): some of the attributes are read-only, such as record count; others are not directly exposed, but still settable, such as table version; and still others require a small amount of processing... at which point do I switch from simple attribute access to method access? Short answer : you don't !-) Long answer : well, in fact you do, but the client code doesn't have to be aware that it's in fact calling an accessor. Before we go into more details, you have to know that Python has a pretty good support for computed attributes, with both a simple generic solution (the property type) and the full monty (custom types implementing the descriptor protocol). So from the interface POV, you should never have an explicit accessor method for what is semantically an attribute (wheter the attribute is a plain or a computed one being part of the implementation). Let's start with your second point: not directly exposed but still settable. I assume you mean not part of the interface, only supposed to be accessed (rw) from the methods - if not, please pardon my stupidity and provide better explanations !-). Better explanation: attribute is publicly available, but buried a couple layers deep in a private structure (yes, private structure name starts with a leading underscore). If yes: Python doesn't have language inforced access restrictions (private / protected / etc), but a *very strong* naming convention which is that names starting with a leading underscore are implementation details, not part of the official interface, and shouldn't be accessed directly. Kind of a warranty voided if unsealed. So if you have attributes you don't want to expose to the outside world, just add a single leading underscore to their names. First and third points are solved by using computed attributes - usually a property. The property type takes a few accessor functions as arguments - typically, a getter and a setter, and eventually a deleter. Used as a class attribute, a property instance will hook up into the attribute lookup / setup mechanism (__getattribute__ and __setattr__), and will call resp. it's getter or setter function, passing it the instance and (for the setter) value. This directly solves the third point. For the first one, the obvious solution is to use a property with a setter that raises an exception - canonically, an AttributeError with a message explaining that the attribute is read-only. And for something more hands-on: class Person(object): def __init__(self, firstname, lastname, birthdate): self.firstname = firstname self.lastname = lastnale self.birthdate = birthdate self._foo = 42 # implementation only def _getfullname(self): return %s %s % (self.firstname, self.lastname) def _setfullname(self, value): raise AttributeError(%s.fullname is read-only % type(self) fullname = property(fget=_getfullname, fset=_setfullname) def _getage(self): return some_computation_with(self.birthdate) def _setage(self, value): raise AttributeError(%s.age is read-only % type(self) age = property(fget=_getage, fset=_setage) For more on computed attributes, you may want to read about the descriptor protocol (google is your friend as usual). This and the attribute resolution mechanism are fundamental parts of Python's inner working. Learn how it works if you really want to leverage Python's power. HTH Very helpful, thank you. Hopefully my brain will be up to the descriptor protocol this time... the last couple times were, um, less than successful. :) ~Ethan~ -- http://mail.python.org/mailman/listinfo/python-list
Re: Workaround To Add Value To TextArea
On Nov 25, 8:27 pm, Rami Chowdhury rami.chowdh...@gmail.com wrote: Rami Chowdhury Never assume malice when stupidity will suffice. -- Hanlon's Razor 408-597-7068 (US) / 07875-841-046 (UK) / 0189-245544 (BD) On Wed, Nov 25, 2009 at 07:19, Victor Subervi victorsube...@gmail.com wrote: Hi; I've noticed that html doesn't support a value attribute for textarea. I have a form in which I enable users to edit data they've entered into my database, and one of the data is a textarea. How do I fill the textarea with the value, or what kind of workaround can I create? Hi Victor, You'll find the textarea and input tags differ significantly, even though they're both typically used in HTML forms. The W3C page has a fair overview of how various parts of HTML forms work in HTML 4.01, and it's roughly accurate for XHTML up to 1.1 as well:http://www.w3.org/TR/html401/interact/forms.html HTH, Rami -- http://mail.python.org/mailman/listinfo/python-list HI, Ok the simplest solution for this is textarea id=someid name=somenameAnything you type between this will be treated as the value for textarea. /textarea Regards Jitish -- http://mail.python.org/mailman/listinfo/python-list
Re: IDE+hg
On Nov 23, 11:37 pm, Rhodri James rho...@wildebst.demon.co.uk wrote: On Mon, 23 Nov 2009 19:20:27 -, NiklasRTZ nikla...@gmail.com wrote: Dear experts, Since no py IDE I found has easy hg access. IDEs PIDA and Eric claim Mercurial support not found i.e. buttons to clone, commit and push to repositories to define dev env dvcs, editor and deployment all in 1. I don't really understand this urge to cram everything into a single program, since that inevitably leads to compromises that will compromise just how much of Mercurial's useful and interesting functionality you can get at. Still, if you really must, Emacs (and presumably vim) seems to be capable of working with most source control systems. -- Rhodri James *-* Wildebeest Herder to the Masses Obvious explainations are commandline is slower and IDEs claim support (Eric) which may mean it's up2 programmer to add and enable the ui. Or any binding to enable 1 ui. Emacs sure can. Thank you -- http://mail.python.org/mailman/listinfo/python-list
Re: IDE+hg
On Nov 24, 2:35 pm, Gerhard Häring g...@ghaering.de wrote: Rhodri James wrote: On Mon, 23 Nov 2009 19:20:27 -, NiklasRTZ nikla...@gmail.com wrote: Dear experts, Since no py IDE I found has easy hg access. IDEs PIDA and Eric claim Mercurial support not found i.e. buttons to clone, commit and push to repositories to define dev env dvcs, editor and deployment all in 1. I don't really understand this urge to cram everything into a single program, since that inevitably leads to compromises that will compromise just how much of Mercurial's useful and interesting functionality you can get at. Still, if you really must, Emacs (and presumably vim) seems to be capable of working with most source control systems. I prefer the commandline tools, too. FWIW, Eclipse supports Mercurial throughhttp://www.vectrace.com/mercurialeclipse/ -- Gerhard Good just Eclipse is too much and tested 4,5... python IDE where non can hg. Just 2 or 3 buttons to drPython with script enables it. -- http://mail.python.org/mailman/listinfo/python-list
Re: IDE+hg
On Nov 24, 3:13 pm, Richard Riley rileyrg...@gmail.com wrote: Gerhard Häring g...@ghaering.de writes: Rhodri James wrote: On Mon, 23 Nov 2009 19:20:27 -, NiklasRTZ nikla...@gmail.com wrote: Dear experts, Since no py IDE I found has easy hg access. IDEs PIDA and Eric claim Mercurial support not found i.e. buttons to clone, commit and push to repositories to define dev env dvcs, editor and deployment all in 1. I don't really understand this urge to cram everything into a single program, since that inevitably leads to compromises that will compromise Huh? Cram what? Nothing is crammed into anything. The IDE/Editor is merely programmed to hook into the external tools just how much of Mercurial's useful and interesting functionality you can get at. Still, if you really must, Emacs (and presumably vim) seems to be capable of working with most source control systems. I prefer the commandline tools, too. FWIW, Eclipse supports Mercurial through http://www.vectrace.com/mercurialeclipse/ -- Gerhard Why would you prefer the command line tools in a shell when the same tools can be used in a way which makes navigating the output so much easier? It strikes me as a kind of intransigence. it's a common misconception that IDEs use their own tools all the time. They don't. They integrate the very same tools. e.g Why the hell would I drop to a command line to diff a file with a back version in GIT when I can do the same in the buffer in emacs with a single hot key? Why would I pipe the output of compile into a file then open that file when a single hot key can fire off the SAME compiler and then list the errors in an emacs buffer and another hot key can take me directly to the source lines in question? Living in the past has its mements, but really. e.g I have pylint working live in python buffers. Big time saver. Similar with C. true. While not many programmers lint the code. -- http://mail.python.org/mailman/listinfo/python-list
Re: creating pipelines in python
Thanks to all for your replies. i want to clarify what i mean by a pipeline. a major feature i am looking for is the ability to chain functions or scripts together, where the output of one script -- which is usually a file -- is required for another script to run. so one script has to wait for the other. i would like to do this over a cluster, where some of the scripts are distributed as separate jobs on a cluster but the results are then collected together. so the ideal library would have easily facilities for expressing this things: script X and Y run independently, but script Z depends on the output of X and Y (which is such and such file or file flag). is there a way to do this? i prefer not to use a framework that requires control of the clusters etc. like Disco, but something that's light weight and simple. right now ruffus seems most relevant but i am not sure -- are there other candidates? thank you. On Nov 23, 4:02 am, Paul Rudin paul.nos...@rudin.co.uk wrote: per perfr...@gmail.com writes: hi all, i am looking for a python package to make it easier to create a pipeline of scripts (all in python). what i do right now is have a set of scripts that produce certain files as output, and i simply have a master script that checks at each stage whether the output of the previous script exists, using functions from the os module. this has several flaws and i am sure someone has thought of nice abstractions for making these kind of wrappers easier to write. does anyone have any recommendations for python packages that can do this? Not entirely what you're looking for, but the subprocess module is easier to work with for this sort of thing than os. See e.g. http://docs.python.org/library/subprocess.html#replacing-shell-pipeline -- http://mail.python.org/mailman/listinfo/python-list
Re: attributes, properties, and accessors -- philosophy
Ethan Furman a écrit : Very helpful, thank you. Hopefully my brain will be up to the descriptor protocol this time... the last couple times were, um, less than successful. :) Well, it's quite simple in fact. Most of the magic happens in object.__getattribute__ and object.__setattr__. You'll find a rough description of what happens here: http://groups.google.com/group/comp.lang.python/browse_frm/thread/a136f7626b2a8b7d/70a672cf7448c68e -- http://mail.python.org/mailman/listinfo/python-list
Re: csv and mixed lists of unicode and numbers
Sibylle Koczian wrote: Hello, I want to put data from a database into a tab separated text file. This looks like a typical application for the csv module, but there is a snag: the rows I get from the database module (kinterbasdb in this case) contain unicode objects and numbers. And of course the unicode objects contain lots of non-ascii characters. If I try to use csv.writer as is, I get UnicodeEncodeErrors. If I use the UnicodeWriter from the module documentation, I get TypeErrors with the numbers. (I'm using Python 2.6 - upgrading to 3.1 on this machine would cause other complications.) So do I have to process the rows myself and treat numbers and text fields differently? Or what's the best way? It's best to convert all data to plain strings before passing it to the csv module. There are many situations where you may want to use a different string format than the standard str(obj) format, so this is best done with a set of format methods - one for each type and format you need, e.g. one for integers, floats, monetary values, Unicode text, plain text, etc. The required formatting also depends on the consumers of the generated csv or tsv file and their locale. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Nov 25 2009) 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 our new mxODBC.Connect Python Database Interface for free ! eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Help with pprint
On 11/25/2009 4:47 AM Nadav Chernin said... Hello, I want to print list of lists in matrix format. So I use pprint with parameter ‘width’ for this target. snip The problem that I don’t know how to select width value, because if: data=[['one', 'one', 'one'], ['one', 'one', 'one'], ['one', 'one', 'one']] pprint(data,width=20) Almost... pprint.pprint(data,width=24) [['one', 'one', 'one'], ['one', 'one', 'one'], ['one', 'one', 'one']] Emile -- http://mail.python.org/mailman/listinfo/python-list
Re: How to run python script in emacs
When I type C-c C-c my emacs window just hangs. If I use Task Manager to kill cmdproxy I can get emacs back but of course interactivity with Python is not accomplished. By the way, if I do C-c ! then I get a functional python shell. Does anybody know a solution to this? On Oct 13, 7:12 am, rustom rustompm...@gmail.com wrote: On Sep 26, 8:54 pm, devilkin devilsp...@gmail.com wrote: I'm just starting learning python, and coding in emacs. I usually split emacs window into two, coding in one, and run script in the other, which is not very convenient. anyone can help me with it? is there any tricks like emacs short cut? also please recommand some emacs plug-ins for python programming, i'm also beginner in emacs.currently i'm only using python.el. python.el comes with emacs python-mode.el comes from python https://launchpad.net/python-mode/ Because of some emacs politics the first ships with emacs although most uses prefer the second. Note 1. The key bindings are different Note 2. Does not work with python3. See my posthttp://groups.google.com/group/comp.lang.python/browse_thread/thread/... Are any plugins supply code folding and autocomplete? See ropehttp://rope.sourceforge.net/ropemacs.htmlif you want but its an installation headache (requires pymacs bleeding edge version etc) I suggest you just get used to python-mode first (C-c ! and C-c C-c) and then explore these questions a bit later. BTW, I'm not a english native speaker, any grammer mistakes, please correct them. :) grammer is spelt grammar :-) -- http://mail.python.org/mailman/listinfo/python-list
Re: CentOS 5.3 vs. Python 2.5
On Nov 25, 4:45 am, Jon Clements jon...@googlemail.com wrote: On Nov 25, 8:13 am, Steven D'Aprano ste...@remove.this.cybersource.com.au wrote: On Tue, 24 Nov 2009 22:42:28 -0800, John Nagle wrote: My dedicated hosting provider wants to switch me to a new server with CentOS 5.3, so I have to look at how much work is required. CentOS 5.3 apparently still ships with Python 2.4. Worse, it requires Python 2.4 for its own internal purposes, and actually installing Python 2.5 breaks the package manager. There's no supported RPM for upgrading. It's apparently necessary to build Python 2.5 from source, build all the packages, and debug. You shouldn't need *quite* that much effort, particularly if you don't care about tkinter. Just use the alternate installation so it doesn't stomp all over the 2.4 installation: .configure make make altinstall You will need root or sudo for that last one. I don't have Centos 5.3, but I have Centos 5, and it seems to work fairly easily for me: $ wgethttp://www.python.org/ftp/python/2.5.4/Python-2.5.4.tgz ... 18:39:11 (69.6 KB/s) - `Python-2.5.4.tgz' saved [11604497/11604497] $ $ tar xzf Python-2.5.4.tgz $ cd Python-2.5.4 $ ./configure ... $ make ... $ sudo make altinstall Password: ... $ python -V Python 2.4.3 $ python2.5 -V Python 2.5.4 And it all seems to just work for me. Nor does that just work. There's documentation, but some of it is in Japanese. http://blog.bashton.com/2008/python-25-rpms-for-rhel-5-centos-5/ I don't understand why you're using documentation for third-party RPMs as evidence that building from source will be troublesome. -- Steven And might I add on a box where there is no root access, but sufficient tools (compilers etc...) 1) Compile from source 2) Set PYTHONPATH correctly for your shell 3) Set your normal path to include your Python rather than the system's default Python 4) When installing modules (via setup.py install or easy_install) include a home_dir= (I think that's right OTTOMH) to somewhere in your home directory, and make sure step 2) complies with this. 5) Double check with which python to make sure it's the correct version. hth Jon. I'm in a RHEL3 - RHEL5.4 environment and the situation is exactly the same. The code I've written requires 2.5 or higher. I keep a /usr/ local/pythons directory and manually install the versions I need there. I then use virtualenv so I don't have to worry about setting PYTHONPATH manually or anything. I just need to remember to use the right Python executable. I got to doing this when I discovered that there are issues with the Cluster Manager (Lucci) and some external Python packages (some of the Zope stuff, if I remember correctly). So, in addition to the above steps, you'll probably also want to include a '--prefix=.' on the command line to the configure script in order to install in a non-standard location. -- http://mail.python.org/mailman/listinfo/python-list
Python Statements/Keyword Localization
Greetings everybody, some time ago I saw a paper that used an XSL transformation sheet to transform (if I remember correctly) a Chinese xml file (inclusive of Chinese-script XML tags) into an XHTML file. More recently you might have all heard how the ICANN has opened up the way for non-latin characters in domain names, so that we'll soon start seeing URLs using Russian, Asian and Arabic characters. In this context I was wondering if there has ever been much thought about a mechanism to allow the localization not only of the strings handled by python but also of its built-in keywords, such as if, for, while, class and so on. For example, the following English- based piece of code: class MyClass(object): def myMethod(self, aVariable): if aVariable == True: print It's True! else: print It's False! would become (in Italian): classe LaMiaClasse(oggetto): def ilMioMetodo(io, unaVariabile) se unaVariabile == Vero: stampa E' Vero! altrimenti: stampa E' Falso! I can imagine how a translation script going through the source code could do a 1:1 keyword translation to English fairly quickly but this would mean that the runtime code still is in English and any error message would be in English. I can also imagine that it should be possible to simply recompile python to use different keywords, but then all libraries using the English keywords would become incompatible, wouldn't they? In this context it seems to be the case that the executable would have to be able to optionally accept -a list- of dictionaries to internally translate to English the keywords found in the input code and at most - one- dictionary to internally translate from English output messages such as a stack trace. What do you guys think? Manu -- http://mail.python.org/mailman/listinfo/python-list
A language for S40 mobiles
Hey, I have recently created an application for S60 mobiles. But I want to create a similar application for S40 mobiles too. I did the application of S60 in pyS60 as java had problems with accessing inbox and contacts. I tried searching for pyS40 , but i couldnt find it. Ques : Is there python for S40 mobiles ? If yes , where can i find the installation files and documentation . If no , which the best language for writing application for S40 mobiles. (keeping in mind that I need to access the Inbox(sms) and contacts ) ? -- http://mail.python.org/mailman/listinfo/python-list
Re: python gui builders
Shawn Wheatley wrote: It's not quite all encompassing, but I found this link last year when looking for a similar comparison of Python GUIs: http://ginstrom.com/scribbles/2008/02/26/python-gui-programming-platforms-for-windows/ Tkinter, Qt, GTK, IronPython... I think the only thing missing is Jython w/ Swing or SWT. Check it out. Instead of *hello* world examples, I was thinking of *real* world applications, something like this, http://mientki.ruhosting.nl/data_www/pylab_works/random_gui.html which in a good GUI package should be doable in about 100 lines of code. cheers, Stef Shawn On Nov 18, 5:11 pm, Stef Mientki stef.mien...@gmail.com wrote: Wouldn't it be nice if each fan of some form of GUI-package, would post it's code (and resulting images) for generating one or two standard GUI-forms ? -- http://mail.python.org/mailman/listinfo/python-list
Re: How to log messages _only once_ from all modules ?
Jean-Michel Pichavant wrote:
Basically, never configure or add handlers to any logger except for the
root logger in your __main__ section. There are very few reasons why you
would break this rule. And when you'll be familiar with the logging
module you'll when to break it.
I have never used logging, but if and when I have a need for it, the
advice above and your clear example will be a good guide to getting
started. Thank you from me too.
tjr
[server.py]
import logging
import logging.handlers
logger = logging.getLogger(__name__) # you'd better to create the logger
at the module level, you may want to log within the module function
def aFunction(a, b, ,c):
logger.debug('You called aFunction')
class Server():
def __init__(self):
self.logger = logger
def util(self):
self.logger.warning('This message comes from Server module ')
[client.py]
import logging
import logging.handlers
from server import Server
logger = logging.getLogger(__name__)
class Client():
def __init__(self):
self.logger = logger
def client_test(self):
self.logger.warning(This message comes from Client module)
if __name__ == __main__:
rootLogger = logging.getLogger()
rootLogger.addHandler(logging.FileHandler(client.log))
rootLogger.handlers[-1].setFormatter(logging.Formatter(%(asctime)s
%(name)-12s %(levelname)-8s %(message)s))
rootLogger.setLevel(logging.DEBUG)
ser = Server()
cli = Client()
ser.util()
cli.client_test()
Happy logging,
Jean-Michel
--
http://mail.python.org/mailman/listinfo/python-list
Re: Help with pprint
Nadav Chernin wrote: Hello, I want to print list of lists in matrix format. So I use pprint with parameter ‘width’ for this target. For example : data=[[1, 1, 1], [1, 1, 1], [1, 1, 1]] pprint(data,width=20) [[1, 1, 1], [1, 1, 1], [1, 1, 1]] The problem that I don’t know how to select width value, because if: data=[['one', 'one', 'one'], ['one', 'one', 'one'], ['one', 'one', 'one']] pprint(data,width=20) [['one', 'one', [snip] 1. Cpp.pprint(data, width=100)alculate a width that is big enough but not too big. In your example, the interval is [24,69] 2. Write a loop, which gives you finer control. for line in data: print(line) ['one', 'one', 'one'] ['one', 'one', 'one'] ['one', 'one', 'one'] To me, this is more like a matrix and possibly better, depending on your particular application. If the items have different default printed widths and you want column lined up, you will need to custom format each field in a column to a uniform width anyway. Print and pprint are for quick, take-what-you-get output, not for customj-designed production output. Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Statements/Keyword Localization
Emanuele D'Arrigo wrote: Greetings everybody, some time ago I saw a paper that used an XSL transformation sheet to transform (if I remember correctly) a Chinese xml file (inclusive of Chinese-script XML tags) into an XHTML file. More recently you might have all heard how the ICANN has opened up the way for non-latin characters in domain names, so that we'll soon start seeing URLs using Russian, Asian and Arabic characters. In this context I was wondering if there has ever been much thought about a mechanism to allow the localization not only of the strings handled by python but also of its built-in keywords, such as if, for, while, class and so on. For example, the following English- based piece of code: class MyClass(object): def myMethod(self, aVariable): if aVariable == True: print It's True! else: print It's False! would become (in Italian): classe LaMiaClasse(oggetto): def ilMioMetodo(io, unaVariabile) se unaVariabile == Vero: stampa E' Vero! altrimenti: stampa E' Falso! I can imagine how a translation script going through the source code could do a 1:1 keyword translation to English fairly quickly but this would mean that the runtime code still is in English and any error message would be in English. I can also imagine that it should be possible to simply recompile python to use different keywords, but then all libraries using the English keywords would become incompatible, wouldn't they? In this context it seems to be the case that the executable would have to be able to optionally accept -a list- of dictionaries to internally translate to English the keywords found in the input code and at most - one- dictionary to internally translate from English output messages such as a stack trace. What do you guys think? It might be necessary to work in tokens, where a token is a word or a string (or maybe also a comment). Your example would be encoded to: «1» «2»(«3»): «4» «5»(«6», «7»): «8» «7» == «9»: «10» «11» «12»: «10» «13» with either English: «1» class «2» MyClass «3» object «4» def «5» myMethod «6» self «7» aVariable «8» if «9» True «10» print «11» It's True! «12» else «13» It's False! or Italian: «1» classe «2» LaMiaClasse «3» oggetto «4» def «5» ilMioMetodo «6» io «7» unaVariabile «8» se «9» Vero «10» stampa «11» É Vero! «12» altrimenti «13» É Falso! Any messages produced by, or format strings used by, the runtime would also be tokens. Python currently does lexical analysis on the source code to identify names, strings, etc; a new tokenised file format would partially bypass that because the names and strings (and comments?) have already been identified. -- http://mail.python.org/mailman/listinfo/python-list
reading windows event logs
Hi All, I'm looking for some guidance on a better way to read eventlogs from windows servers. I've written a handy little app that relies on WMI to pull the logs an in all my testing it worked great. When I deployed it, however, WMI choked on servers with a lot of logs. I've tried pulling the logs using much smaller VB scripts as well and they still failed, so I'm pretty sure I'm facing a WMI problem and not a python or system resources problem. So I couldn't effectively get logs off of domain controllers for example or file servers that had auditing turned on. Sadly those are exactly the types of servers whose logs are most interesting. So I'm looking for suggestions on a way to grab that data without using WMI for remote machines. I know MS has C libraries for this but I haven't touched C for 10 years so I'm hoping there's a python equivalent out there somewhere. Any advice would be appreciated. Thanks in advance for any help, Eric -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Statements/Keyword Localization
Emanuele D'Arrigo man...@gmail.com wrote: Greetings everybody, some time ago I saw a paper that used an XSL transformation sheet to transform (if I remember correctly) a Chinese xml file (inclusive of Chinese-script XML tags) into an XHTML file. More recently you might have all heard how the ICANN has opened up the way for non-latin characters in domain names, so that we'll soon start seeing URLs using Russian, Asian and Arabic characters. Non-latin characters in domain names are already possible (and usable and actually used) for some years by now. Google for punycode. ICANN was talking about TLD. I can imagine how a translation script going through the source code could do a 1:1 keyword translation to English fairly quickly ...and get conflickts because I named my variable (in English python), say, stampa. Anyway, see http://www.chinesepython.org -- --- | Radovan Garabík http://kassiopeia.juls.savba.sk/~garabik/ | | __..--^^^--..__garabik @ kassiopeia.juls.savba.sk | --- Antivirus alert: file .signature infected by signature virus. Hi! I'm a signature virus! Copy me into your signature file to help me spread! -- http://mail.python.org/mailman/listinfo/python-list
Re: csv and mixed lists of unicode and numbers
Terry Reedy schrieb: In Python 3, a file opened in 'b' mode is for reading and writing bytes with no encoding/decoding. I believe cvs works with files in text mode as it returns and expects strings/text for reading and writing. Perhaps the cvs doc should say must not be opened in 'b' mode. Not sure. I think that might really be better, because for version 2.6 they explicitly stated 'b' mode was necessary. The results I couldn't understand, even after reading the documentation for open(): import csv acsv = open(rd:\home\sibylle\temp\tmp.csv, wb) row = [babc, bdef, bghi] wtr = csv.writer(acsv) wtr.writerow(row) Traceback (most recent call last): File pyshell#22, line 1, in module wtr.writerow(row) TypeError: must be bytes or buffer, not str Same error message with row = [5]. But I think I understand it now: the cvs.writer takes mixed lists of text and numbers - that's exactly why I like to use it - so it has to convert them before writing. And it converts into text - even bytes for a file opened in 'b' mode. Right? Thank you, everybody, for explaining. Sibylle -- http://mail.python.org/mailman/listinfo/python-list
Re: reading windows event logs
EW wrote: Hi All, I'm looking for some guidance on a better way to read eventlogs from windows servers. I've written a handy little app that relies on WMI to pull the logs an in all my testing it worked great. When I deployed it, however, WMI choked on servers with a lot of logs. I've tried pulling the logs using much smaller VB scripts as well and they still failed, so I'm pretty sure I'm facing a WMI problem and not a python or system resources problem. So I couldn't effectively get logs off of domain controllers for example or file servers that had auditing turned on. Sadly those are exactly the types of servers whose logs are most interesting. So I'm looking for suggestions on a way to grab that data without using WMI for remote machines. I know MS has C libraries for this but I haven't touched C for 10 years so I'm hoping there's a python equivalent out there somewhere. Any advice would be appreciated. The events logs are in %SystemRoot%\system32\config and have the extension .evt. There's info here on the file format: http://www.whitehats.ca/main/members/Malik/malik_eventlogs/malik_eventlogs.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Statements/Keyword Localization
Emanuele D'Arrigo wrote: Greetings everybody, some time ago I saw a paper that used an XSL transformation sheet to transform (if I remember correctly) a Chinese xml file (inclusive of Chinese-script XML tags) into an XHTML file. More recently you might have all heard how the ICANN has opened up the way for non-latin characters in domain names, so that we'll soon start seeing URLs using Russian, Asian and Arabic characters. In this context I was wondering if there has ever been much thought about a mechanism to allow the localization not only of the strings handled by python but also of its built-in keywords, such as if, for, while, class and so on. There have been various debates and discussions on the topic. There has been slow movement away from ascii-only in user code. (But not in the stdlib, nor will there be there.) 1. Unicode data type. 2. Unicode allowed in comment and string literals. This required input decoding and coding cookie. This lead, I believe somewhat accidentally, to 3. Extended ascii (high bit set, for other European chars in various encodings) for identifiers. 4 (In 3.0) unicode allowed for identifiers Here is a version of the anti-customized-keyword position. Python is designed to be read by people. Currently, any programmer in the world can potentially read any Python program. The developers, especially Guido, like this. Fixed keywords are not an undue burden because any educated person should learn to read Latin characters a-z,0-9. and Python has an intentionally short list that the developers are loath to lengthen. Change 4 above inhibits universal readability. But once 3 happened and str became unicode, in 3.0, it was hard to say no to this. A 'pro' argument: Python was designed for learning and is good for that and *is* used in schools down to the elementary level. But kids cannot be expected to know foreign alphabets and words whill still learning their own. For example, the following English- based piece of code: class MyClass(object): def myMethod(self, aVariable): if aVariable == True: print It's True! else: print It's False! would become (in Italian): classe LaMiaClasse(oggetto): def ilMioMetodo(io, unaVariabile) se unaVariabile == Vero: stampa E' Vero! altrimenti: stampa E' Falso! I can imagine how a translation script going through the source code could do a 1:1 keyword translation to English fairly quickly but this would mean that the runtime code still is in English and any error message would be in English. This is currently seen as a reason to not have other keywords: it will do no good anyway. A Python programmer must know minimal English and the keywords are the least of the problem. I can imagine that there could be a mechanism for extracting and replacing error messages with translations, like there is for Python code, but I do not know if it will even happen with haphazard volunteer work or will require grant sponsorship. I can also imagine that it should be possible to simply recompile python to use different keywords, but then all libraries using the English keywords would become incompatible, wouldn't they? In this context it seems to be the case that the executable would have to be able to optionally accept -a list- of dictionaries to internally translate to English the keywords found in the input code and at most - one- dictionary to internally translate from English output messages such as a stack trace. What do you guys think? I would like anyone in the world to be able to use Python, and I would like Python programmers to potentially be able to potentially read any Python code and not have the community severely balkanized. To me, this would eventually mean both native keywords and tranliteration from other alphabets and scripts to latin chars. Not an easy project. Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Can self crush itself?
In article mailman.965.1259143133.2873.python-l...@python.org, Chris Rebert c...@rebertia.com wrote: If you want to prevent an instance being created in the first place, you can override __new__(). Or just raise an exception in __init__(), which I think is more common practice. -- Aahz (a...@pythoncraft.com) * http://www.pythoncraft.com/ The best way to get information on Usenet is not to ask a question, but to post the wrong information. -- http://mail.python.org/mailman/listinfo/python-list
reposition a column
Hi:
In a pdb file made of lines ATOM .. (see attachment as I was unable
to obtain plain text with gmail) I would like to reposition the second
W from column 19 to 17 ( (Python numbering; in pdb numbering it
would be 20 18). I started with bold slices, then I was unable to
complete the script. Much obliged for help.
francesco pietra
# Sample line
# Slice indexes cut to the left of the corrresponding item index
# 1 2 3 4 5 6
# 012345678901234567890123456789012345678901234567890123456789012345 ...
# ATOM 1 W W 1 0.690 35.960 33.300 1.00 0.00
data = open('out.2.5.2.5.2.0.pdb', 'r')
outp = open('rect.out.2.5.2.5.2.0.pdb', 'w')
for L in data:
if L[19] == 'W':
L =
outp.write(L)
--
http://mail.python.org/mailman/listinfo/python-list
Re: creating pipelines in python
per, 25.11.2009 17:42: Thanks to all for your replies. i want to clarify what i mean by a pipeline. a major feature i am looking for is the ability to chain functions or scripts together, where the output of one script -- which is usually a file -- is required for another script to run. so one script has to wait for the other. i would like to do this over a cluster, where some of the scripts are distributed as separate jobs on a cluster but the results are then collected together. so the ideal library would have easily facilities for expressing this things: script X and Y run independently, but script Z depends on the output of X and Y (which is such and such file or file flag). is there a way to do this? i prefer not to use a framework that requires control of the clusters etc. like Disco, but something that's light weight and simple. right now ruffus seems most relevant but i am not sure -- are there other candidates? As others have pointed out, a Unix pipe approach might be helpful if you want the processes to run in parallel. You can send the output of one process to stdout, a network socket, an HTTP channel or whatever, and have the next process read it and work on it while it's being generated by the first process. Looking into generators is still a good idea, even if you go for a pipe approach. See the link posted by Wolodja Wentland. Stefan -- http://mail.python.org/mailman/listinfo/python-list
confused with os.fork()
Hi all, I am a little bit confused about os.fork(). Say I have the following code. import os a = ['a','b','c','d','e'] for i in xrange(len(a)): pid = os.fork() if not pid: print a[i] os._exit(0) From most of the tuts and examples I saw online, I expect it to print a,b,c,d,e. Sometimes (very rare) it prints something like this: ab c d e I thought there is no way a parent process can enter the 'if'. Can anyone explain this behaviour? Is it the case where parent is forking a child even before the previous child is printing? In that case is there a way to prevent that? I can use os.wait(), but I don't want to wait till the child is finished, just don't want to mix the child processes, that's it. - dksr -- http://mail.python.org/mailman/listinfo/python-list
Re: confused with os.fork()
Sandy schrieb: Hi all, I am a little bit confused about os.fork(). Say I have the following code. import os a = ['a','b','c','d','e'] for i in xrange(len(a)): pid = os.fork() if not pid: print a[i] os._exit(0) From most of the tuts and examples I saw online, I expect it to print a,b,c,d,e. Sometimes (very rare) it prints something like this: ab c d e I thought there is no way a parent process can enter the 'if'. Can anyone explain this behaviour? Is it the case where parent is forking a child even before the previous child is printing? In that case is there a way to prevent that? I can use os.wait(), but I don't want to wait till the child is finished, just don't want to mix the child processes, that's it. Yes, that's the case - you have a race-condition here. Two childs at the same time write, interleaving their data. To prevent this, you can use file-locking. http://docs.python.org/library/fcntl.html#fcntl.lockf Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Python OpenOffice Spreadsheets
On Nov 23, 5:49 am, Gerhard Häring g...@ghaering.de wrote: Is there a *simple* way to read OpenOffice spreadsheets? Bonus: write them, too? I mean something like: doc.cells[0][0] = foo doc.save(xyz.ods) From a quick look, pyodf offers little more than just using a XML parser directly. -- Gerhard OO Calc has an HTML file feature for auto updating fields in a spreadsheet. I hacked together something for a talk a few years ago: http://www.icanprogram.com/hosug (See Open Office Calc demo section) While it isn't Python code it should be easy enough to convert to Python. bob -- http://mail.python.org/mailman/listinfo/python-list
Re: reposition a column
Francesco Pietra wrote: Hi: In a pdb file made of lines ATOM .. (see attachment as I was unable to obtain plain text with gmail) I would like to reposition the second W from column 19 to 17 ( (Python numbering; in pdb numbering it would be 20 18). I started with bold slices, then I was unable to complete the script. Much obliged for help. I'm assuming that you want to put a space where the 'W' was. L = L[ : 17] + L[19] + L[18] + ' ' + L[20 : ] -- http://mail.python.org/mailman/listinfo/python-list
Re: reposition a column
2009/11/25 Francesco Pietra francesco.pie...@accademialucchese.it: Hi: In a pdb file made of lines ATOM .. (see attachment as I was unable to obtain plain text with gmail) I would like to reposition the second W from column 19 to 17 ( (Python numbering; in pdb numbering it would be 20 18). I started with bold slices, then I was unable to complete the script. Much obliged for help. francesco pietra -- http://mail.python.org/mailman/listinfo/python-list Hi, using only string slices, you can probably do something like the following (if I underestand the specification correctly, i.e. to swap the two columns under the given condition). An alternative is to swap the indices directly using list. Also a regular expression replace with re.sub might be viable (probably the shortest one)... hth, vbr ## scale = 1 2 3 4 5 6 012345678901234567890123456789012345678901234567890123456789012345 data_line = ATOM 1 W W 1 0.690 35.960 33.300 1.00 0.00 if data_line [19] == 'W': output_line = data_line [0:17]+data_line [19]+data_line [18]+data_line [17]+data_line [20:] # alternatively ch_19, ch_17 = data_line [19], data_line [17] data_lst = list(data_line) data_lst[17] = ch_19 data_lst[19] = ch_17 output_line_2 = .join(data_lst) print output_line_2 == output_line else: output_line = data_line print scale print data_line print scale print output_line print = * 66 -- http://mail.python.org/mailman/listinfo/python-list
Re: confused with os.fork()
Sandy wrote: Hi all, I am a little bit confused about os.fork(). Say I have the following code. import os a = ['a','b','c','d','e'] for i in xrange(len(a)): pid = os.fork() if not pid: print a[i] os._exit(0) From most of the tuts and examples I saw online, I expect it to print a,b,c,d,e. Sometimes (very rare) it prints something like this: ab c d e I thought there is no way a parent process can enter the 'if'. Can anyone explain this behaviour? Is it the case where parent is forking a child even before the previous child is printing? In that case is there a way to prevent that? I can use os.wait(), but I don't want to wait till the child is finished, just don't want to mix the child processes, that's it. The parent isn't entering the 'if' statement. os.fork() simply forks the process and then both the parent and the child processes continue. All of the child processes run independently and there's no guarantee as to the order in which they'll print, and there's nothing to stop the printouts from being mixed together (you would need to protect the 'print' with a mutex to do that). -- http://mail.python.org/mailman/listinfo/python-list
Re: reading windows event logs
On 26/11/2009 7:22 AM, EW wrote: Hi All, I'm looking for some guidance on a better way to read eventlogs from windows servers. I've written a handy little app that relies on WMI to pull the logs an in all my testing it worked great. When I deployed it, however, WMI choked on servers with a lot of logs. I've tried pulling the logs using much smaller VB scripts as well and they still failed, so I'm pretty sure I'm facing a WMI problem and not a python or system resources problem. So I couldn't effectively get logs off of domain controllers for example or file servers that had auditing turned on. Sadly those are exactly the types of servers whose logs are most interesting. So I'm looking for suggestions on a way to grab that data without using WMI for remote machines. I know MS has C libraries for this but I haven't touched C for 10 years so I'm hoping there's a python equivalent out there somewhere. Any advice would be appreciated. Look for the win32evtlog and win32evtlogutil modules which come with pywin32 (http://sf.net/projects/pywin32) Cheers, Mark -- http://mail.python.org/mailman/listinfo/python-list
embed python dynamically
How do you embed the python dll file distributed with the automatic installable python distribution on windows? Is it possible to dynamically load the python dll from running c program and start up a python interpreter ? Do you have to compile python from source to be able to embed python? -- http://mail.python.org/mailman/listinfo/python-list
High-performance Python websites
Hi all, I'm contemplating setting up a Python-powered website for the tourist industry, which will involve a web service, a good deal of XML processing, and a Django-powered front-end. If the project works, it could get a lot of traffic. I'm sure it can be done, but I'm looking to find out more about how existing high-volume Python sites have managed their workload. Can anyone give me examples of high-volume Python-powered websites, if possible with some idea of their architecture? Many thanks, Nick -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3.1 cx_Oracle 5.0.2 ImportError: DLL load failed: The specified module could not be found.
On Nov 19, 6:57 pm, Neil Hodgson nyamatongwe+thun...@gmail.com wrote: André: Apparently the error is caused by cx_Oracle not being able to find the Oracle client DLLs (oci.dll and others). The client home path and the client home path bin directory are in the PATH System Variable and oci.dll is there. Open the cx_Oracle extension with Dependency Walker (http://www.dependencywalker.com/) to get a better idea about what the problem is in more detail. Neil Thanks Neil. I used Dependency Walker and discovered cx_Oracle was looking for python30.dll. I seems to be a known issue with Python 3.1 http://bugs.python.org/issue4091. I'm now used Python 2.6.4 and the corresponding cx_Oracle version with no problems. Thanks for the help -- http://mail.python.org/mailman/listinfo/python-list
Re: High-performance Python websites
Hi, Managing load of high volume of visitors is a common issue for all kind of web technologies. I mean this is not the python issue. This issue is mostly about server level designs. You need to supply load balancing for both web servers and databases to make your web site able to respond to several concurrent visitors. Of course a good programmed website is a key performance issue but for your mention I would also suggest considering how many hardwares, how many webservers, how many database cluster and which database server should be used or will be used in the future.. Regards, Kutlu On Nov 26, 2:24 am, Nick Mellor nick.mellor.gro...@pobox.com wrote: Hi all, I'm contemplating setting up a Python-powered website for the tourist industry, which will involve a web service, a good deal of XML processing, and a Django-powered front-end. If the project works, it could get a lot of traffic. I'm sure it can be done, but I'm looking to find out more about how existing high-volume Python sites have managed their workload. Can anyone give me examples of high-volume Python-powered websites, if possible with some idea of their architecture? Many thanks, Nick -- http://mail.python.org/mailman/listinfo/python-list
Re: Can self crush itself?
Or just raise an exception in __init__(),.. Then we are forced to handle this exception outside of class code. It's Ok. Never mind. Next thing. I can't understand why we can get __name__, but not __dict__, on the module level? print __name__ print __dict__ = RESTART __main__ Traceback (most recent call last): File D:\Python25\zewrt.py, line 19, in module print __dict__ NameError: name '__dict__' is not defined -- http://mail.python.org/mailman/listinfo/python-list
Re: embed installed python dynamically
ok, it was almost intuitive. just made a simple visual c express dll project included python26\include and python26\libs in the project settings the debug version has issues, but the release compiles without a problem. here is the source: http://github.com/tinku99/embedpython -- http://mail.python.org/mailman/listinfo/python-list
Re: Can self crush itself?
n00m wrote: Or just raise an exception in __init__(),.. Then we are forced to handle this exception outside of class code. It's Ok. Never mind. Next thing. I can't understand why we can get __name__, but not __dict__, on the module level? print __name__ print __dict__ If the global namespace contained itself, as a dict, there would be an infinite loop. -- http://mail.python.org/mailman/listinfo/python-list
jython and java application
Hi there, Apologies if this is on the wrong group, this is a jython question. Please redirect me to the correct group if this is in error. I have a java application that takes no arguements. When I run it, it spits out output, and finishes. I am trying to run this java application from jython 2.5.1, JRE6. I have made simple Hello World java classes be callable from a simple jython script, yet I am stumbling on the java main construct in the application. print krbtest.SimpleHistoricTutorial().main() obviously gives me an args error (expected 1, got 0) as the definition in the java application is: public static void main(String[] args) The jython code is as follows: import krbtest # was messing with this to pass a java formatted string but to no avail from java.lang import String print krbtest.SimpleHistoricTutorial().main() # Any advice greatly appreciated! Especially with how to call main() with arguments from jython. Apologies in advance again if this is the wrong group. -- http://mail.python.org/mailman/listinfo/python-list
Re: jython and java application
KB wrote: Hi there, Apologies if this is on the wrong group, this is a jython question. Please redirect me to the correct group if this is in error. I have a java application that takes no arguements. When I run it, it spits out output, and finishes. I am trying to run this java application from jython 2.5.1, JRE6. I have made simple Hello World java classes be callable from a simple jython script, yet I am stumbling on the java main construct in the application. print krbtest.SimpleHistoricTutorial().main() obviously gives me an args error (expected 1, got 0) as the definition in the java application is: public static void main(String[] args) The jython code is as follows: import krbtest # was messing with this to pass a java formatted string but to no avail from java.lang import String print krbtest.SimpleHistoricTutorial().main() # Any advice greatly appreciated! Especially with how to call main() with arguments from jython. Apologies in advance again if this is the wrong group. I don't know jython, but from the look of it I'd say that you need to give main() some kind of argument, such as a string or an empty list. (If you pass an empty jython list to a Java method that's expecting an array of String, will the Java method receive a zero-length array of String?). -- http://mail.python.org/mailman/listinfo/python-list
Re: jython and java application
I don't know if it's right place but normally main method requires an args even it is not needed to supply from commandline. Maybe this is a jython runtime error and requires at least an empty argument. You could try to pass and empty string array like ['']. I'm not using jython please use your own notation. Regards, Kutlu On Nov 26, 3:30 am, KB ke...@nekotaku.com wrote: Hi there, Apologies if this is on the wrong group, this is a jython question. Please redirect me to the correct group if this is in error. I have a java application that takes no arguements. When I run it, it spits out output, and finishes. I am trying to run this java application from jython 2.5.1, JRE6. I have made simple Hello World java classes be callable from a simple jython script, yet I am stumbling on the java main construct in the application. print krbtest.SimpleHistoricTutorial().main() obviously gives me an args error (expected 1, got 0) as the definition in the java application is: public static void main(String[] args) The jython code is as follows: import krbtest # was messing with this to pass a java formatted string but to no avail from java.lang import String print krbtest.SimpleHistoricTutorial().main() # Any advice greatly appreciated! Especially with how to call main() with arguments from jython. Apologies in advance again if this is the wrong group. -- http://mail.python.org/mailman/listinfo/python-list
Re: embed installed python dynamically
ok, its even easier than that. With autohotkey: pythondll := DllCall(LoadLibrary, str, c:\windows \system32\python26.dll) init := DllCall(c:\windows\system32\python26.dll\Py_Initialize , Cdecl) msgbox python initalized call := DllCall(c:\windows\system32\python26.dll\PyRun_SimpleString , str, import sys, Cdecl) msgbox will exit using python code call := DllCall(c:\windows\system32\python26.dll\PyRun_SimpleString , str, sys.exit(0), Cdecl) init := DllCall(c:\windows\system32\python26.dll\Py_Finalize , Cdecl) msgbox % never called -- http://mail.python.org/mailman/listinfo/python-list
Re: Can self crush itself?
On Wed, 25 Nov 2009 20:09:25 -0500, Terry Reedy wrote: n00m wrote: Or just raise an exception in __init__(),.. Then we are forced to handle this exception outside of class code. It's Ok. Never mind. Next thing. I can't understand why we can get __name__, but not __dict__, on the module level? print __name__ print __dict__ If the global namespace contained itself, as a dict, there would be an infinite loop. Why would that be a problem? Any time you do this: g = globals() you create such a recursive reference: globals()['g']['g']['g']['g'] is globals() is g True Yes, there's a tiny bit extra work needed when bootstrapping the processes, and when exiting, but I don't see why it's a big deal. Whether it's necessary or useful is another story. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Feature request: String-inferred names
Hello all, I just posted to my blog about a feature that I'd like to see added to Python. Before I go through the trouble of learning how to write a PEP or how to extend the Python interpreter, I want to know what people in the community have to say about it. http://alphaios.blogspot.com/2009/11/python-string-inferred-names-working.html As far as I know, a feature like this does not appear in any existing PEPs. (If it does I would appreciate it if someone could tell me what PEP it is.) Please give and comments you may have, but I request that you be constructive if you must criticize...thank you! TMG -- http://mail.python.org/mailman/listinfo/python-list
Help with error on self.show
Hi, I am getting an error when I try to run some code my friend gave me. Here is the error: Warning (from warnings module): File C:\Documents and Settings\GriseC\Desktop\Widget Base\applet.py, line 145 self.show() GtkWarning: ../../../../gtk+/gdk/win32/gdkwindow-win32.c:1089: SetWindowLong failed: Not enough storage is available to process this command. If anyone knows what this means, any info would be greatly appreciated. Thanks, Christian -- http://mail.python.org/mailman/listinfo/python-list
Re: Can self crush itself?
aaah... globals()...
Then why self not in globals()?
class Moo:
cnt = 0
def __init__(self, x):
self.__class__.cnt += 1
if self.__class__.cnt 3:
self.x = x
else:
print id(self)
for item in globals().items():
print item
f = Moo(1)
g = Moo(2)
h = Moo(3)
= RESTART
13407336
('g', __main__.Moo instance at 0x00CC9260)
('f', __main__.Moo instance at 0x00CC9440)
('__builtins__', module '__builtin__' (built-in))
('Moo', class __main__.Moo at 0x00CCC060)
('__name__', '__main__')
('__doc__', None)
--
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Re: Feature request: String-inferred names
I just posted to my blog about a feature that I'd like to see added to Python. Before I go through the trouble of learning how to write a PEP or how to extend the Python interpreter, I want to know what people in the community have to say about it. http://alphaios.blogspot.com/2009/11/python-string-inferred-names-working.html As far as I know, a feature like this does not appear in any existing PEPs. (If it does I would appreciate it if someone could tell me what PEP it is.)Please give and comments you may have, but I request that you be constructive if you must criticize...thank you! TMG -- http://mail.python.org/mailman/listinfo/python-list
Re: jython and java application
Hmmm, for some reason my follow up post didn't make it.
Modified jython script to:
# Eclipse package name for java application
import krbtest
import java.lang as lang
from java.lang import String
from jarray import array
myargs=array([],String)
krbtest.SimpleHistoricTutorial().main(myargs)
Now I get:
Traceback (most recent call last):
File test.py, line 15, in module
krbtest.SimpleHistoricTutorial().main(myargs)
at krbtest.SimpleHistoricTutorial.run(SimpleHistoricTutorial.java:27)
at krbtest.SimpleHistoricTutorial.main(SimpleHistoricTutorial.java:
22)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
java.lang.NoClassDefFoundError: java.lang.NoClassDefFoundError: com/
bloomberglp/blpapi/Session
I would post the java app but its quite large, but the main defn:
public static void main(String[] args) throws Exception
{
SimpleHistoricTutorial example = new SimpleHistoricTutorial();
example.run();
}
Is pretty vanilla. I have tried making the run() a public method and
call it, all to no avail.
Note, the Java app works fine standalone, I just need to call it from
jython.
Again, any help appreciated.
--
http://mail.python.org/mailman/listinfo/python-list
Re: jython and java application
Hi,
I don't know how do you call the java library from within your jython
application it gives java.lang.NoClassDefFoundError
This looks like you referenced jar or whatever else from your jython
application which also needs a class com/bloomberglp/blpapi/Session
in another library file. It might run while running standalone because
the dependent libraries exists where it looks for. For your jython
application you need to make krbtest referenced to the dependent
libraries. It seems you application took a copy of krbtest and other
libraries not available to krbtest there. I hope it helps.
Regards,
Kutlu
On Nov 26, 4:49 am, KB ke...@nekotaku.com wrote:
Hmmm, for some reason my follow up post didn't make it.
Modified jython script to:
# Eclipse package name for java application
import krbtest
import java.lang as lang
from java.lang import String
from jarray import array
myargs=array([],String)
krbtest.SimpleHistoricTutorial().main(myargs)
Now I get:
Traceback (most recent call last):
File test.py, line 15, in module
krbtest.SimpleHistoricTutorial().main(myargs)
at krbtest.SimpleHistoricTutorial.run(SimpleHistoricTutorial.java:27)
at krbtest.SimpleHistoricTutorial.main(SimpleHistoricTutorial.java:
22)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
java.lang.NoClassDefFoundError: java.lang.NoClassDefFoundError: com/
bloomberglp/blpapi/Session
I would post the java app but its quite large, but the main defn:
public static void main(String[] args) throws Exception
{
SimpleHistoricTutorial example = new SimpleHistoricTutorial();
example.run();
}
Is pretty vanilla. I have tried making the run() a public method and
call it, all to no avail.
Note, the Java app works fine standalone, I just need to call it from
jython.
Again, any help appreciated.
--
http://mail.python.org/mailman/listinfo/python-list
Re: Can self crush itself?
On Wed, 25 Nov 2009 18:39:09 -0800, n00m wrote: aaah... globals()... Then why self not in globals()? class Moo: cnt = 0 def __init__(self, x): self.__class__.cnt += 1 Because it isn't a global, it's a local -- it is defined inside a class. Inside functions and classes, names you create are local, not global, unless you declare them global. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Can self crush itself?
n00m wrote: aaah... globals()... Then why self not in globals()? class Moo: cnt = 0 def __init__(self, x): self.__class__.cnt += 1 if self.__class__.cnt 3: self.x = x else: print id(self) for item in globals().items(): print item f = Moo(1) g = Moo(2) h = Moo(3) Because self is not in globals(). It's defined as a local symbol in Moo.__init__ , supplied to that function as the first parameter. Mel. -- http://mail.python.org/mailman/listinfo/python-list
How do I correctly download Wikipedia pages?
I'm trying to scrape a Wikipedia page from Python. Following instructions here: http://en.wikipedia.org/wiki/Wikipedia:Database_download http://en.wikipedia.org/wiki/Special:Export I use the URL http://en.wikipedia.org/wiki/Special:Export/Train; instead of just http://en.wikipedia.org/wiki/Train;. But instead of getting the page I expect, and can see in my browser, I get an error page: import urllib url = http://en.wikipedia.org/wiki/Special:Export/Train; print urllib.urlopen(url).read() ... Our servers are currently experiencing a technical problem. This is probably temporary and should be fixed soon ... (Output is obviously truncated for your sanity and mine.) Is there a trick to downloading from Wikipedia with urllib? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I correctly download Wikipedia pages?
Hi, Try not to be caught if you send multiple requests :) Have a look at here: http://wolfprojects.altervista.org/changeua.php Regards Kutlu On Nov 26, 5:45 am, Steven D'Aprano ste...@remove.this.cybersource.com.au wrote: I'm trying to scrape a Wikipedia page from Python. Following instructions here: http://en.wikipedia.org/wiki/Wikipedia:Database_downloadhttp://en.wikipedia.org/wiki/Special:Export I use the URL http://en.wikipedia.org/wiki/Special:Export/Train; instead of just http://en.wikipedia.org/wiki/Train;. But instead of getting the page I expect, and can see in my browser, I get an error page: import urllib url = http://en.wikipedia.org/wiki/Special:Export/Train; print urllib.urlopen(url).read() ... Our servers are currently experiencing a technical problem. This is probably temporary and should be fixed soon ... (Output is obviously truncated for your sanity and mine.) Is there a trick to downloading from Wikipedia with urllib? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I correctly download Wikipedia pages?
2009/11/25 Steven D'Aprano ste...@remove.this.cybersource.com.au I'm trying to scrape a Wikipedia page from Python. Following instructions here: Have you checked out http://meta.wikimedia.org/wiki/Pywikipediabot? Its not just via urllib, but I've scraped several MediaWiki-based sites with the software successfully. --S -- http://mail.python.org/mailman/listinfo/python-list
Re: How do I correctly download Wikipedia pages?
I fetched a different problem. Whenever I tried to fetch any page from wikipedia, I received 403. Then I found that wikipedia don't accept the default user-agent (might be python-urllib2.x or something like this). After setting my own user-agent, it worked fine. You can try this if you receive 403. On Thu, Nov 26, 2009 at 10:04 AM, Stephen Hansen apt.shan...@gmail.comwrote: 2009/11/25 Steven D'Aprano ste...@remove.this.cybersource.com.au I'm trying to scrape a Wikipedia page from Python. Following instructions here: Have you checked out http://meta.wikimedia.org/wiki/Pywikipediabot? Its not just via urllib, but I've scraped several MediaWiki-based sites with the software successfully. --S -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Feature request: String-inferred names
On Wed, Nov 25, 2009 at 6:35 PM, The Music Guy fearsomedragon...@gmail.com wrote: Hello all, I just posted to my blog about a feature that I'd like to see added to Python. Before I go through the trouble of learning how to write a PEP or how to extend the Python interpreter, I want to know what people in the community have to say about it. http://alphaios.blogspot.com/2009/11/python-string-inferred-names-working.html As far as I know, a feature like this does not appear in any existing PEPs. (If it does I would appreciate it if someone could tell me what PEP it is.) Please give and comments you may have, but I request that you be constructive if you must criticize...thank you! Ugly, Perlish, and as you even admit, entirely unnecessary. And you'd need to wait at least a year anyway: http://www.python.org/dev/peps/pep-3003/ Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: High-performance Python websites
Thanks Kutlu, I wasn't aware that Google used Python for running their Google groups servers. Can you confirm that? The only place I've seen Google explicitly use Python on their web front end is in the Google Ads tests. I am impressed by the responsiveness of lawrence.com, ljworld.com and others on the Django home page (http://www.djangoproject.com/) They seem to do a great job of loading large, complex pages using Django (stacked on Python, stacked on bytecode, stacked on C.) Shows it can be done. Nick -- http://mail.python.org/mailman/listinfo/python-list
Re: Feature request: String-inferred names
On Nov 25, 10:49 pm, Chris Rebert c...@rebertia.com wrote: On Wed, Nov 25, 2009 at 6:35 PM, The Music Guy fearsomedragon...@gmail.com wrote: Hello all, I just posted to my blog about a feature that I'd like to see added to Python. Before I go through the trouble of learning how to write a PEP or how to extend the Python interpreter, I want to know what people in the community have to say about it. http://alphaios.blogspot.com/2009/11/python-string-inferred-names-wor... As far as I know, a feature like this does not appear in any existing PEPs. (If it does I would appreciate it if someone could tell me what PEP it is.) Please give and comments you may have, but I request that you be constructive if you must criticize...thank you! Ugly, Perlish, and as you even admit, entirely unnecessary. And you'd need to wait at least a year anyway:http://www.python.org/dev/peps/pep-3003/ Cheers, Chris --http://blog.rebertia.com Like I said, lots of things in Python are unnecessary, but that doesn't make them useless, and it certainly doesn't mean they shouldn't exist. My proposed feature is not useless; I think it would make a lot of code easier. As for it being ugly...well, that's really a matter of opinion and experience. How ugly it looks to you will be a product of how well you think it can be used, and how well you use it yourself. When I first looked at decorators, I thought they were not only ugly but confusing. Now that I understand them, however, I hardly consider them ugly, and see them as a shining example of Python's abilities. (By the way, decorators are another example of a feature that is entirely unnecessary, but still very useful.) As for the wait, that's to be expected. I'm willing to wait. -- http://mail.python.org/mailman/listinfo/python-list
Re: Feature request: String-inferred names
P.S., my apologies for sending replies with different email addresses. This is an unintentional technical issue and I am currently trying to get it fixed. On Wed, Nov 25, 2009 at 11:45 PM, Brad themusicguy...@gmail.com wrote: On Nov 25, 10:49 pm, Chris Rebert c...@rebertia.com wrote: On Wed, Nov 25, 2009 at 6:35 PM, The Music Guy fearsomedragon...@gmail.com wrote: Hello all, I just posted to my blog about a feature that I'd like to see added to Python. Before I go through the trouble of learning how to write a PEP or how to extend the Python interpreter, I want to know what people in the community have to say about it. http://alphaios.blogspot.com/2009/11/python-string-inferred-names-wor. .. As far as I know, a feature like this does not appear in any existing PEPs. (If it does I would appreciate it if someone could tell me what PEP it is.) Please give and comments you may have, but I request that you be constructive if you must criticize...thank you! Ugly, Perlish, and as you even admit, entirely unnecessary. And you'd need to wait at least a year anyway: http://www.python.org/dev/peps/pep-3003/ Cheers, Chris --http://blog.rebertia.com Like I said, lots of things in Python are unnecessary, but that doesn't make them useless, and it certainly doesn't mean they shouldn't exist. My proposed feature is not useless; I think it would make a lot of code easier. As for it being ugly...well, that's really a matter of opinion and experience. How ugly it looks to you will be a product of how well you think it can be used, and how well you use it yourself. When I first looked at decorators, I thought they were not only ugly but confusing. Now that I understand them, however, I hardly consider them ugly, and see them as a shining example of Python's abilities. (By the way, decorators are another example of a feature that is entirely unnecessary, but still very useful.) As for the wait, that's to be expected. I'm willing to wait. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: High-performance Python websites
Hi Nick, Sorry about my concern on Google. It caused a confusion about Google groups. I didn't mean explicitly where Google uses python, I mentioned just Google uses Python. A Google officer told that they run Python on thousands of their servers at an interview. Due to this claim I wanted to say it for you. Actualy of course it can be done and even it will not be worse than any other frameworks, and I bet can be better than Java and ASP.NET if configured and programmed well. I really encourage you to use mod_python for any project. Mod_python and mod_wsgi made it very powerful at web side. As I said in my previous message a web application's responsiveness is dependent to several issues. A good web framework, server speed, database design etc.. In this case you want to use django, which as I know build for mod_python and can be configured to run on a mod_wsgi web server. Consider that you will have one million members on your site. That traffic simply needs several clustered web servers and clustered databases. This means you supply a load balancing. So concurrent user sessions will be shared on different web servers. You can do your best with such a clustered system with such a powerful language. Really don't worry about that. Regards, Kutlu On Nov 26, 7:21 am, Nick Mellor nick.mellor.gro...@pobox.com wrote: Thanks Kutlu, I wasn't aware that Google used Python for running their Google groups servers. Can you confirm that? The only place I've seen Google explicitly use Python on their web front end is in the Google Ads tests. I am impressed by the responsiveness of lawrence.com, ljworld.com and others on the Django home page (http://www.djangoproject.com/) They seem to do a great job of loading large, complex pages using Django (stacked on Python, stacked on bytecode, stacked on C.) Shows it can be done. Nick -- http://mail.python.org/mailman/listinfo/python-list
Re: High-performance Python websites
Hi again, I also want to say something about creating a better web application. If I were you I wouldn't use any web framework like django or other. If you want to create a commercial project and want to manage all modules of the application yourself I suggest you to create your own framework. I don't mean create a Django like framework. Determine your needs, modules, services and build your own modules. Use other independent open source modules for any specific issues. To make a successful project requires your own business logic. And you can do this with your own algorithm. Don't avoid collecting other modules for templating, xml parsing, DB connectivity issues. But build your own framework with these and your own modules.. Regards, Kutlu -- http://mail.python.org/mailman/listinfo/python-list
Re: Feature request: String-inferred names
En Wed, 25 Nov 2009 23:35:06 -0300, The Music Guy fearsomedragon...@gmail.com escribió: I just posted to my blog about a feature that I'd like to see added to Python. Before I go through the trouble of learning how to write a PEP or how to extend the Python interpreter, I want to know what people in the community have to say about it. http://alphaios.blogspot.com/2009/11/python-string-inferred-names-working.html As far as I know, a feature like this does not appear in any existing PEPs. (If it does I would appreciate it if someone could tell me what PEP it is.) Already suggested, and rejected; see PEP 363: http://www.python.org/dev/peps/pep-0363/ and the python-dev discussion. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Feature request: String-inferred names
Brad wrote: On Nov 25, 10:49 pm, Chris Rebert c...@rebertia.com wrote: On Wed, Nov 25, 2009 at 6:35 PM, The Music Guy fearsomedragon...@gmail.com wrote: Hello all, I just posted to my blog about a feature that I'd like to see added to Python. Before I go through the trouble of learning how to write a PEP or how to extend the Python interpreter, I want to know what people in the community have to say about it. http://alphaios.blogspot.com/2009/11/python-string-inferred-names-wor... As far as I know, a feature like this does not appear in any existing PEPs. (If it does I would appreciate it if someone could tell me what PEP it is.) Please give and comments you may have, but I request that you be constructive if you must criticize...thank you! Ugly, Perlish, and as you even admit, entirely unnecessary. And you'd need to wait at least a year anyway:http://www.python.org/dev/peps/pep-3003/ Cheers, Chris --http://blog.rebertia.com Like I said, lots of things in Python are unnecessary, but that doesn't make them useless, and it certainly doesn't mean they shouldn't exist. My proposed feature is not useless; I think it would make a lot of code easier. How is it easier than using dictionary with string as keys? setattr, getattr, and delattr are already sugar for accessing instance.__dict__. You make a comparison with decorators; even if it's unnecessary it does eliminate a DRY case (don't repeat yourself): def foo(self): pass foo = property(foo) there you repeat foo three times unnecessarily, instead of: @property def foo(self): pass people already bashed decorator syntax because it is ungoogleable; a non-python programmer reading a python code can't google python @ to find out that it's a decorator. $ has very similar problem; and we don't want to add more of this wart. You also make with iterators and generators. Iterator and generator is an implication of the core design of python; because python chose not to have a for-loop (python's for-loop is actually a for-each-loop). Without the iterator protocol, it is not possible to make an iterable class and people would have to use for x in range(len(foo)): every so often. Iterator protocol also makes it possible to have infinite iterable (e.g. for x in primegenerator(): produces prime numbers indefinitely). A list comprehension is space saver; it saves a lot of lines for the very common operation: a = [] for x in orig: if test(x): a.append(transform(x)) into one concise line: a = [transform(x) for x in orig if test(x)] Also a generator comprehension can be passed around without being evaluated. As you see, these unnecessary features does have significant benefits to it. Decorators reduced DRY, iterators/generators eliminates the need of range-len for-loop, list comprehension is huge space saver. The proposed syntax only saves a few character, does not eliminate any DRY, is ungoogleable, and looks confusing to me. Is there any significant benefit from it? -- http://mail.python.org/mailman/listinfo/python-list
Re: Can self crush itself?
n00m wrote: I can't understand why we can get __name__, but not __dict__, on the module level? For much the same reason that you can see your own feet but (unless you look in a mirror) you can't see your own eyes. -- Greg -- http://mail.python.org/mailman/listinfo/python-list
Re: Feature request: String-inferred names
On Wed, 25 Nov 2009 20:44:36 -0600, The Music Guy music...@alphaios.net declaimed the following in gmane.comp.python.general: I just posted to my blog about a feature that I'd like to see added to Python. http://alphaios.blogspot.com/2009/11/python-string-inferred-names-working.html I don't think getattr and setattr are used anywhere near frequently enough to justify special syntax. To warrant having its own synax, a feature needs to be used *all the time*. If you find yourself using getattr and setattr that much, it's probably a symptom that you're abusing namespaces for things that would be better done using dictionaries. (A frequent question asked by newcomers from certain other kinds of languages is something like How do I assign to a variable whose name is in another variable? The answer is almost always Don't do that, use a dictionary.) -- Greg -- http://mail.python.org/mailman/listinfo/python-list
[issue7117] Backport py3k float repr to trunk
Mark Dickinson dicki...@gmail.com added the comment: Thanks, Eric. The only remaining documentation issues I'm aware of are in Doc/tutorial/floatingpoint.rst. I think Raymond is going to update this to match the py3k version. I'll call this done, then! Thanks for all your help. -- resolution: - accepted stage: - committed/rejected status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7117 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue1606092] csv module broken for unicode
R. David Murray rdmur...@bitdance.com added the comment: This is indeed fixed in Python 3. If someone wishes to step forward with patches for 2.7, they can reopen this bug, but I don't think it is worth the effort. -- nosy: +r.david.murray resolution: - out of date stage: - committed/rejected status: open - closed type: - feature request ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue1606092 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue6615] multiprocessing logging support test
Vinay Sajip vinay_sa...@yahoo.co.uk added the comment: Since you reversed() the _handlerList, the following part need to be changed: -_handlerList.insert(0, weakref.ref(handler, _removeHandlerRef)) +_handlerList.append(weakref.ref(handler, _removeHandlerRef)) Corrected in r76509. Florent, thanks for catching this (and for the patch). -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue6615 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7394] sqlite3: some OperationalError exceptions should be ProgrammingError (PEP 249)
New submission from dontbugme pythonbugsbugme...@spamavert.com: The following code raises OperationalError exceptions: python -c 'import sqlite3; sqlite3.connect(:memory:).execute(bad syntax)' python -c 'import sqlite3; sqlite3.connect(:memory:).execute(SELECT * FROM no_such_table)' python -c 'import sqlite3; sqlite3.connect(:memory:).execute(SELECT no_such_column)' But ProgrammingError should be raised, as per PEP 249: ProgrammingError Exception raised for programming errors, e.g. table not found or already exists, syntax error in the SQL statement, wrong number of parameters specified, etc. It must be a subclass of DatabaseError. -- components: Library (Lib) messages: 95719 nosy: dontbugme severity: normal status: open title: sqlite3: some OperationalError exceptions should be ProgrammingError (PEP 249) type: behavior versions: Python 2.6 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7394 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7391] Re-title the Using Backslash to Continue Statements anti-idiom
Neil Cerutti ceru...@trans-video.net added the comment: Yes, I know. That's why I feel it should not be labeled an anti-idiom, as it currently seems to be. -- status: pending - open ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7391 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue7391] Re-title the Using Backslash to Continue Statements anti-idiom
Georg Brandl ge...@python.org added the comment: Agreed. -- priority: - low resolution: wont fix - ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue7391 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue4097] Traceback doesn't run back all the way
flox la...@yahoo.fr added the comment: It looks similar to issue7378, but the latter has more details. Close as duplicate? -- nosy: +flox ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue4097 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue4158] compilation of sqlite3 fails
flox la...@yahoo.fr added the comment: Please close as invalid. -- nosy: +flox ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue4158 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue4158] compilation of sqlite3 fails
Changes by flox la...@yahoo.fr: -- nosy: -flox ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue4158 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
