Re: GridCellEditor
Hi,all! How i can manually start CellEditor in wxGrid for spicified Cell in grid in my programm: mygrid.SetGridCursor(2,3) mygrid.MakeCellVisible(2,3) # starting editing... ?? mygrid.ShowCellEditControl() don't working... help me, please... Try: mygrid..EnableCellEditControl(True) Thanks you. It's working... -- http://mail.python.org/mailman/listinfo/python-list
Re: how to config a comserver in a customize dll?
ÒÊÃÉɽÈË [EMAIL PROTECTED] wrote:
When i use the below code to create a comserver on Windows OS£¬i find that
the com was configed in the file
python23com.dll,why? if i want to config it in my customize dll,how should i
do?
Python is not a compiled language. It does not produce DLLs. The real
executable code for a Python COM server is always contained in
python23com.dll. The registry will tell the interpreter that is called by
python23com.dll where it can find your script.
class TestPythonCom:
_public_methods_ = [ 'SplitString' ]
_reg_progid_ = TestPythonCom.Application
# NEVER copy the following ID
# Use print pythoncom.CreateGuid() to make a new one.
_reg_clsid_ = {93D78ABA-1F6C-4B1C-97C7-C3700511415A}
def SplitString(self, val):
return val
--
- Tim Roberts, [EMAIL PROTECTED]
Providenza Boekelheide, Inc.
--
http://mail.python.org/mailman/listinfo/python-list
Re: first release of PyPy
Christian == Christian Tismer [EMAIL PROTECTED] writes: PyPy is written in python, if it can be compiled then the programs can be as well. Christian Well, this is not really true. PyPy is written in Christian RPython, a sub-language of Python that is implicitly Christian defined by simple and static enough to be compilable. Could it be possible to tag some modules in application code as RPython-compatible, making it possible to implement the speed critical parts in RPython? -- Ville Vainio http://tinyurl.com/2prnb -- http://mail.python.org/mailman/listinfo/python-list
Re: first release of PyPy
The question still remains, can it run it's self? ;) On 20 May 2005, at 23:50, Kay Schluehr wrote: holger krekel wrote: Welcome to PyPy 0.6 *The PyPy Development Team is happy to announce the first public release of PyPy after two years of spare-time and half a year of EU funded development. The 0.6 release is eminently a preview release.* Congratulation to You and Your team! PyPy is really awesome and if it succeeds in speed demands after the translation phase I believe that the project will shift the power within the Python community on the long run. There are moments I'm almost shocked about it and think about the fate of other programming programming languages like LISP. PyPy can be resolved to Python in Python but also Python multiplied/powered by itself which is much more triumphant. A short review of the 'thunks' objspace example gives me the impression that the language development process as we know it comes to an end and makes a kind of transition. This is both very exciting and dangerous, like every philosophical event. Regards, Kay -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
[avast! - INFECTED] hi
It's the long-awaited film version of the Broadway hit. The message sent as a binary attachment. --- avast! Antivirus: message Sortant INFECTE: \readme.zip#2473510810 (Win32:Lovgate-W [Wrm]) Moved to chest Base de donnees virale (VPS): 0520-4, 20/05/2005 Teste le: 05/03/2005 08:34:45 avast! - copyright (c) 1988-2004 ALWIL Software. http://www.avast.com -- http://mail.python.org/mailman/listinfo/python-list
Re: first release of PyPy
holger krekel wrote: The PyPy 0.6 release *The PyPy Development Team is happy to announce the first public release of PyPy after two years of spare-time and half a year of EU funded development. The 0.6 release is eminently a preview release.* Yay! Congratulations guys! Michael. -- [EMAIL PROTECTED] British Broadcasting Corporation, Research and Development Kingswood Warren, Surrey KT20 6NP This message (and any attachments) may contain personal views which are not the views of the BBC unless specifically stated. -- http://mail.python.org/mailman/listinfo/python-list
Manipulating mailboxes
Hi All, I need to create a daemon that sits on a server and forwards some e-mails. (Well not only that, it needs to change header information before forwarding and also insert messages into a database). The mailbox module is fine but I do not see a way to delete/add messages - it is ready only. The other possiblity is IMAP4 but it is bad because my program should not store passwords for all users. I can only see one solution right now: 1. Make a copy of the mailbox 2. Truncate the mailbox 3. Process the messages in the copy and forward the e-mails by sending out real e-mails. But this looks so clumsy. Is there a way to delete/add messages to mailboxes of different users, directly? Thanks, Laci 2.0 -- http://mail.python.org/mailman/listinfo/python-list
Re: install python 2.4.1
Hello, I installed python 2.4.1 at last. I installed in two different computers all windows xp pro. I found the installation size in add/remove software different in size is that normal. pujo -- http://mail.python.org/mailman/listinfo/python-list
Re: Manipulating mailboxes
Laszlo Zsolt Nagy [EMAIL PROTECTED] writes: But this looks so clumsy. Is there a way to delete/add messages to mailboxes of different users, directly? Why not use procmail or equivalent to drop incoming messages into your daemon one at a time. Then use the smtp module to forward them to their actual destinations. -- http://mail.python.org/mailman/listinfo/python-list
Re: first release of PyPy
Ville Vainio wrote: Christian == Christian Tismer [EMAIL PROTECTED] writes: PyPy is written in python, if it can be compiled then the programs can be as well. Christian Well, this is not really true. PyPy is written in Christian RPython, a sub-language of Python that is implicitly Christian defined by simple and static enough to be compilable. Could it be possible to tag some modules in application code as RPython-compatible, making it possible to implement the speed critical parts in RPython? Interesting idea. Especially since we have automatic translation from RPythonic application code to interpreter level. Maybe not for now, but I'm cc-ing pypy-dev. @rpythonic:-) -- Christian Tismer :^) mailto:[EMAIL PROTECTED] tismerysoft GmbH : Have a break! Take a ride on Python's Johannes-Niemeyer-Weg 9A :*Starship* http://starship.python.net/ 14109 Berlin : PGP key - http://wwwkeys.pgp.net/ work +49 30 802 86 56 mobile +49 173 24 18 776 fax +49 30 80 90 57 05 PGP 0x57F3BF04 9064 F4E1 D754 C2FF 1619 305B C09C 5A3B 57F3 BF04 whom do you want to sponsor today? http://www.stackless.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: firebird and unicode
flupke wrote: snip I solved it by getting the latest py files from CVS and overwriting the existing ones. It gave an Attribute error but that was gone after commenting this line: #isc_info_isc_version = _k.isc_info_isc_version I'm not sure if this is a safe way of working. It's like jumping over a fence with barb wire. You know your balls might be in danger but sometimes you got to take a risk :) I hope i don't end up singing with a funny voice ;) Thanks, Benedict Verheyen -- http://mail.python.org/mailman/listinfo/python-list
Re: firebird and unicode
Le Mon, 23 May 2005 09:30:31 GMT, flupke a écrit : It's like jumping over a fence with barb wire. You know your balls might be in danger but sometimes you got to take a risk :) +1 QOTW I hope i don't end up singing with a funny voice ;) -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python suitable for a huge, enterprise size app?
Op 2005-05-20, Dieter Maurer schreef [EMAIL PROTECTED]: Fredrik Lundh [EMAIL PROTECTED] writes on Thu, 19 May 2005 09:54:15 +0200: ... and unless your operating system is totally braindead, and thus completely unfit to run huge enterprise size applications, that doesn't really matter much. leaks are problematic, large peak memory use isn't. Could you elaborate a bit? Large peak memory use means that the application got a large address space. What garantees that the residual memory use (after the peak) is compact and not evenly spread across the address space. Well nothing. But how do you want to return memory back to the O.S. when the residual memory use isn't compact and evenly spread across the address space? -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
what is addMethod ?
Hello, I saw some python open source project with many self.addMethod() functions (with 3 paramters) What does self.addMethod() is good for ? I had looked at documnetation (downloaded and grepped all the pdf doc files) and could not find a thing about it ; nore did googling helped. Regards, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python suitable for a huge, enterprise size app?
Antoon Pardon [EMAIL PROTECTED] writes: Well nothing. But how do you want to return memory back to the O.S. when the residual memory use isn't compact and evenly spread across the address space? All large-scale language implementations with automatic storage management that I know of use compacting storage schemes, e.g. copying garbage collectors (maybe generational, multi-threaded/realtime, or whatever). I think Python will have to do the same, sooner or later. -- http://mail.python.org/mailman/listinfo/python-list
Re: how to config a comserver in a customize dll?
But just to muddy the waters, using py2exe you can package your COM server as a .dll in its own right. Cheers, Giles Brown -- http://mail.python.org/mailman/listinfo/python-list
Re: what is addMethod ?
Le 23 May 2005 02:40:57 -0700, [EMAIL PROTECTED] a écrit : Hello, I saw some python open source project with many self.addMethod() functions (with 3 paramters) Which open source project ? Which class in which module ? What does self.addMethod() is good for ? Find where this method is defined : (with fgrep or findstr according to your operating system) and then import NameOfModule help(NameOfModule) -- http://mail.python.org/mailman/listinfo/python-list
Re: what is addMethod ?
[EMAIL PROTECTED] wrote: I saw some python open source project with many self.addMethod() functions (with 3 paramters) What does self.addMethod() is good for ? It's not a standard method, so it's good for whatever the particular class you were looking at was using it for. We might be able to tell you more if you mentioned the specific script you saw it used in. -- http://mail.python.org/mailman/listinfo/python-list
Com object questions
Hi, I'm still figuring out how I can use the win32com for the use of a com object which I think is made in VB First I've created a file with MakePy Then I used the following code to init the com object: import win32com.client Client = win32com.client.Dispatch(ClientModule.Client) Then, when I want to use a function, for example this one: ipaddr = kddClient.GetLocalIPAddress() I get this error: File C:\Python23\lib\site-packages\win32com\gen_py\0F4570B8-4D39-47CD-84B4-8A424233EEBFx0x1x0.py, line 69, in GetLocalIPAddress return self._ApplyTypes_(11, 1, (36, 0), (), 'GetLocalIPAddress', None,) File C:\Python23\lib\site-packages\win32com\client\__init__.py, line 446, in _ApplyTypes_ return self._get_good_object_(self._oleobj_.InvokeTypes(dispid, 0, wFlags, retType, argTypes, *args),user, resultCLSID) com_error: (-2147024809, 'The parameter is incorrect.', None, None) I don't know which parameter is incorrect because the function doesn't need any parameters and when I try to use a struct for the IP address using the following code: ipaddr = win32com.client.Record(IPADDRESS_STRUCT, Client) I get this message: File C:\Python23\lib\site-packages\win32com\client\__init__.py, line 403, in Record raise ValueError, The structure '%s' is not defined in module '%s' % (name, package) ValueError: The structure 'IPADDRESS_STRUCT' is not defined in module 'module 'win32com.gen_py.0F4570B8-4D39-47CD-84B4-8A424233EEBFx0x1x0' from 'C:\Python23\lib\site-packages\win32com\gen_py\0F4570B8-4D39-47CD-84B4-8A424233EEBFx0x1x0.pyc'' I think this means that there is no struct IPADDRESS_STRUCT defined in the com object but when I'm going to the ComBrowser in PythonWin it is in there. I'm using python 2.3 with pywin32 build 203 Does anybody know what i'm doing wrong? Kind regards, Gijs -- This message has been scanned for viruses and dangerous content by Network Sentry, and is believed to be clean. http://www.networksentry.co.za -- http://mail.python.org/mailman/listinfo/python-list
Re: Manipulating mailboxes
change header information, insert messages into a database, delete/add messages, should not store passwords for all users, ... and any things else you wish to do - if your OS is UNIX - just forward mail messages of some users to your python script (you don't need to write a daemon for this) All you need is to place file .forward in users home directory, and write like this: |/path/myscript.py and chmod the script: chmod 777 /path/myscript.py Laszlo Zsolt Nagy wrote: Hi All, I need to create a daemon that sits on a server and forwards some e-mails. (Well not only that, it needs to change header information before forwarding and also insert messages into a database). The mailbox module is fine but I do not see a way to delete/add messages - it is ready only. The other possiblity is IMAP4 but it is bad because my program should not store passwords for all users. I can only see one solution right now: 1. Make a copy of the mailbox 2. Truncate the mailbox 3. Process the messages in the copy and forward the e-mails by sending out real e-mails. But this looks so clumsy. Is there a way to delete/add messages to mailboxes of different users, directly? Thanks, Laci 2.0 -- Best regards, Maksim Kasimov mailto: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
What are OOP's Jargons and Complexities?
What are OOP's Jargons and Complexities
Xah Lee, 20050128
The Rise of Classes, Methods, Objects
In computer languages, often a function definition looks like this:
subroutine f (x1, x2, ...) {
variables ...
do this or that
}
In advanced languages such as LISP family, it is not uncommon to define
functions inside a function. For example:
subroutine f (x1, x2, ...) {
variables...
subroutine f1 (x1...) {...}
subroutine f2 (x1...) {...}
}
Often these f1 f2 inner functions are used inside f, and are not
relevant outside of f. Such power of the language gradually developed
into a style of programing. For example:
subroutine a_surface () {
coordinatesList = ...;
subroutine translate (distance) {...}
subroutine rotate (angle) {..}
}
Such a style is that the a_surface is no longer viewed as a function.
But instead, a boxed set of functions, centered around a piece of data.
And, all functions for manipulating this piece of data are all embodied
in this function. For example:
subroutine a_surface (arg) {
coordinatesList = ...
subroutine translate (distance) {set coordinatesList to translated
version}
subroutine rotate (angle) {set coordinatesList to rotated version}
subroutine return () {return coordinatesList}
if (no arg) {return coordinatesList}
else { apply arg to coordinatesList }
}
In this way, one uses a_surface as a data, which comes with its owe set
of functions:
mySurface = a_surface();
mySurface(rotate(angle));// now the surface data has been
rotated
mySurface(translate(distance)); // now its translated
newSurface = mySurface(return())
So now, a_surface is no longer viewed as a subroutine, but a boxed set
of things centered around a piece of data. All functions that work on
the data are included in the boxed set. This paradigm possible in
functional languages has refined so much so that it spread to other
groups and became known as Object Oriented Programing, and complete
languages with new syntax catered to such scheme emerged.
In such languages, instead of writing them like this:
mySurface = a_surface();
mySurface(rotate(angle));
the syntax is changed to like this, for example:
mySurface = new a_surface();
mySurfaceRotated = mySurface.rotate(angle);
In such languages, the super subroutine a_surface is no longer called a
function or subroutine. It is now called a Class. And now the
variable holding the function mySurface = a_surface() is now called a
Object. Subroutines inside the function a_surface() are no longer
called inner-subroutines. They are called Methods. The act of
assigning a super-subroutine to a variable is called instantiation.
This style of programing and language have become so fanatical that in
such dedicated languages like Java, everything in the language are
Classes. One can no longer just define a variable or subroutine.
Instead, one creates these meta-subroutine Classes. Everything
one do are inside Classes. And one assign Classes inside these Classes
to create Objects. And one uses Methods to manipulate
Objects. In this fashion, even basic primitives like numbers, strings,
and lists are no longer atomic entities. They are now Classes.
For example, in Java, a string is a class String. And inside the class
String, there are Methods to manipulate strings, such as finding the
number of chars, or extracting parts of the string. This can get very
complicated. For example, in Java, there are actually two Classes of
strings: One is String, and the other is StringBuffer. Which one to use
depends on whether you intend to change the data.
So, a simple code like this in normal languages:
a = a string;
b = another one;
c = join(a,b);
print c;
or in lisp style
(set a a string)
(set b another one)
(set c (join a b))
(print c)
becomes in pure OOP languages:
public class test {
public static void main(String[] args) {
String a = new String(a string);
String b = new String(another one);
StringBuffer c = new StringBuffer(40);
c.append(a); c.append(b);
System.out.println(c.toString());
}
}
Here, the new String creates a String object. The new
StringBuffer(40) creates the changeable string object StringBuffer,
with room for 40 chars. append is a method of StringBuffer. It is
used to join two Strings.
Notice the syntax c.append(a), which we can view it as calling a
inner subroutine append, on a super subroutine that has been assigned
to c, where, the inner subroutine modifies the inner data by appending
a to it.
And in the above Java example, StringBuffer class has another method
toString() used to convert this into a String Class, necessary
because System.out.println's parameter requires a String type, not
StringBuffer.
For a example of the complexity of classes and methods, see the Java
documentation for the StringBuffer class at
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/StringBuffer.html
(local copy)
In the same way, numbers in Java have become a formalization of many
classes: Double, Float, Integer, Long...
What are OOP's Jargons and Complexities?
What are OOP's Jargons and Complexities
Xah Lee, 20050128
The Rise of Classes, Methods, Objects
In computer languages, often a function definition looks like this:
subroutine f (x1, x2, ...) {
variables ...
do this or that
}
In advanced languages such as LISP family, it is not uncommon to define
functions inside a function. For example:
subroutine f (x1, x2, ...) {
variables...
subroutine f1 (x1...) {...}
subroutine f2 (x1...) {...}
}
Often these f1 f2 inner functions are used inside f, and are not
relevant outside of f. Such power of the language gradually developed
into a style of programing. For example:
subroutine a_surface () {
coordinatesList = ...;
subroutine translate (distance) {...}
subroutine rotate (angle) {..}
}
Such a style is that the a_surface is no longer viewed as a function.
But instead, a boxed set of functions, centered around a piece of data.
And, all functions for manipulating this piece of data are all embodied
in this function. For example:
subroutine a_surface (arg) {
coordinatesList = ...
subroutine translate (distance) {set coordinatesList to translated
version}
subroutine rotate (angle) {set coordinatesList to rotated version}
subroutine return () {return coordinatesList}
if (no arg) {return coordinatesList}
else { apply arg to coordinatesList }
}
In this way, one uses a_surface as a data, which comes with its owe set
of functions:
mySurface = a_surface();
mySurface(rotate(angle));// now the surface data has been
rotated
mySurface(translate(distance)); // now its translated
newSurface = mySurface(return())
So now, a_surface is no longer viewed as a subroutine, but a boxed set
of things centered around a piece of data. All functions that work on
the data are included in the boxed set. This paradigm possible in
functional languages has refined so much so that it spread to other
groups and became known as Object Oriented Programing, and complete
languages with new syntax catered to such scheme emerged.
In such languages, instead of writing them like this:
mySurface = a_surface();
mySurface(rotate(angle));
the syntax is changed to like this, for example:
mySurface = new a_surface();
mySurfaceRotated = mySurface.rotate(angle);
In such languages, the super subroutine a_surface is no longer called a
function or subroutine. It is now called a Class. And now the
variable holding the function mySurface = a_surface() is now called a
Object. Subroutines inside the function a_surface() are no longer
called inner-subroutines. They are called Methods. The act of
assigning a super-subroutine to a variable is called instantiation.
This style of programing and language have become so fanatical that in
such dedicated languages like Java, everything in the language are
Classes. One can no longer just define a variable or subroutine.
Instead, one creates these meta-subroutine Classes. Everything
one do are inside Classes. And one assign Classes inside these Classes
to create Objects. And one uses Methods to manipulate
Objects. In this fashion, even basic primitives like numbers, strings,
and lists are no longer atomic entities. They are now Classes.
For example, in Java, a string is a class String. And inside the class
String, there are Methods to manipulate strings, such as finding the
number of chars, or extracting parts of the string. This can get very
complicated. For example, in Java, there are actually two Classes of
strings: One is String, and the other is StringBuffer. Which one to use
depends on whether you intend to change the data.
So, a simple code like this in normal languages:
a = a string;
b = another one;
c = join(a,b);
print c;
or in lisp style
(set a a string)
(set b another one)
(set c (join a b))
(print c)
becomes in pure OOP languages:
public class test {
public static void main(String[] args) {
String a = new String(a string);
String b = new String(another one);
StringBuffer c = new StringBuffer(40);
c.append(a); c.append(b);
System.out.println(c.toString());
}
}
Here, the new String creates a String object. The new
StringBuffer(40) creates the changeable string object StringBuffer,
with room for 40 chars. append is a method of StringBuffer. It is
used to join two Strings.
Notice the syntax c.append(a), which we can view it as calling a
inner subroutine append, on a super subroutine that has been assigned
to c, where, the inner subroutine modifies the inner data by appending
a to it.
And in the above Java example, StringBuffer class has another method
toString() used to convert this into a String Class, necessary
because System.out.println's parameter requires a String type, not
StringBuffer.
For a example of the complexity of classes and methods, see the Java
documentation for the StringBuffer class at
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/StringBuffer.html
(local copy)
In the same way, numbers in Java have become a formalization of many
classes: Double, Float, Integer, Long...
Re: Manipulating mailboxes
Maksim Kasimov wrote: change header information, insert messages into a database, delete/add messages, should not store passwords for all users, ... and any things else you wish to do - if your OS is UNIX - just forward mail messages of some users to your python script (you don't need to write a daemon for this) All you need is to place file .forward in users home directory, and write like this: |/path/myscript.py and chmod the script: chmod 777 /path/myscript.py Oh, fantastic. :-) Then I can open stdin and read the e-mail message from there. Thank you so much Laci 2.0 -- http://mail.python.org/mailman/listinfo/python-list
minidom and DTD
Hi All, How can I put the !DOCTYPE collection SYSTEM recipes.dtd thing into an XML created by xml.dom.minidom? Of course I can parse the generated XML file and insert the DOCTYPE string but there must be a standard way to do this... Best, Laci 2.0 -- http://mail.python.org/mailman/listinfo/python-list
Re: what is addMethod ?
Thnks, I wrongly took it for a standard method; I found where it is defined (it's part of the project); Tnnks. John -- http://mail.python.org/mailman/listinfo/python-list
Strange behaviour of floating point constants in imported modules
Hi, We are distributing our Python application as the short main script (.py file) and a set of modules compiled to the .pyc files. So far, we have always treated .pyc files as portable between platforms, but recently we have discovered an annoying problem. In a module, there is the following code fragment: Deg2Rad = math.pi/180.0 angleEPS = 0.5 angle0B = angleEPS*Deg2Rad which calculates 'angle0B' as the angle of a half of a degree, converted to radians. The module has been compiled on an English Windows XP machine, and then tested on a Polish Windows XP workstation. What was our astonishment, when various exceptions started to be raised on a test machine (no problem on the original English-version Windows XP). We have traced them to the fact, that both angleEPS and angle0B were found to be ZERO (!!!), whereas in reality, angle0B is about 0.008. And this all happened silently, without any error during the import of the module! What's the reason of this error? I start thinking, that it may be related to the fact, that the decimal point on the Enlish Windows XP is the '.' character, and on the Polish one - ','. Is there a good method to avoid this kind of problems? How to make such distributed modules really portable? Thanks in advance -- Tomasz Lisowski -- http://mail.python.org/mailman/listinfo/python-list
overhead of starting threads
Hi,
What is the overhead of starting threads in Python? Currently my app
starts around 20 threads per second, but I'm considering creating a pool
of a fixed number of threads and keeping them fed with data. But only if
it would give me a noticeable performance boost.
Has anyone got any any experience in this area that they could share? -
before I start investigating myself..
I'm running on Windows, if thats relevant.
Regards,
Will McGugan
--
http://www.willmcgugan.com
.join( [ {'*':'@','^':'.'}.get(c,None) or chr(97+(ord(c)-84)%26) for c
in jvyy*jvyyzpthtna^pbz ] )
--
http://mail.python.org/mailman/listinfo/python-list
Re: What are OOP's Jargons and Complexities?
You're point being...?
I'm an old lisp hacker too, and lisp developed
objects too, because they're cool and useful (Flavors CLOS).
Java has inner classes also, and nobody misses FLET LABELS.
Limiting responsiblity and enhanced type safety, as well as
improved readablity are a win hands down over the bad old
days.
Lisp is not a more advanced language than Java. Its 30+
years older and shows it in alot places. Lisp has some
things I wish were in Java but the corralary holds true.
Object orient programming in Lisp is nice too.
Xah Lee wrote:
What are OOP's Jargons and Complexities
Xah Lee, 20050128
The Rise of Classes, Methods, Objects
In computer languages, often a function definition looks like this:
subroutine f (x1, x2, ...) {
variables ...
do this or that
}
In advanced languages such as LISP family, it is not uncommon to define
functions inside a function. For example:
subroutine f (x1, x2, ...) {
variables...
subroutine f1 (x1...) {...}
subroutine f2 (x1...) {...}
}
Often these f1 f2 inner functions are used inside f, and are not
relevant outside of f. Such power of the language gradually developed
into a style of programing. For example:
subroutine a_surface () {
coordinatesList = ...;
subroutine translate (distance) {...}
subroutine rotate (angle) {..}
}
Such a style is that the a_surface is no longer viewed as a function.
But instead, a boxed set of functions, centered around a piece of data.
And, all functions for manipulating this piece of data are all embodied
in this function. For example:
subroutine a_surface (arg) {
coordinatesList = ...
subroutine translate (distance) {set coordinatesList to translated
version}
subroutine rotate (angle) {set coordinatesList to rotated version}
subroutine return () {return coordinatesList}
if (no arg) {return coordinatesList}
else { apply arg to coordinatesList }
}
In this way, one uses a_surface as a data, which comes with its owe set
of functions:
mySurface = a_surface();
mySurface(rotate(angle));// now the surface data has been
rotated
mySurface(translate(distance)); // now its translated
newSurface = mySurface(return())
So now, a_surface is no longer viewed as a subroutine, but a boxed set
of things centered around a piece of data. All functions that work on
the data are included in the boxed set. This paradigm possible in
functional languages has refined so much so that it spread to other
groups and became known as Object Oriented Programing, and complete
languages with new syntax catered to such scheme emerged.
In such languages, instead of writing them like this:
mySurface = a_surface();
mySurface(rotate(angle));
the syntax is changed to like this, for example:
mySurface = new a_surface();
mySurfaceRotated = mySurface.rotate(angle);
In such languages, the super subroutine a_surface is no longer called a
function or subroutine. It is now called a Class. And now the
variable holding the function mySurface = a_surface() is now called a
Object. Subroutines inside the function a_surface() are no longer
called inner-subroutines. They are called Methods. The act of
assigning a super-subroutine to a variable is called instantiation.
This style of programing and language have become so fanatical that in
such dedicated languages like Java, everything in the language are
Classes. One can no longer just define a variable or subroutine.
Instead, one creates these meta-subroutine Classes. Everything
one do are inside Classes. And one assign Classes inside these Classes
to create Objects. And one uses Methods to manipulate
Objects. In this fashion, even basic primitives like numbers, strings,
and lists are no longer atomic entities. They are now Classes.
For example, in Java, a string is a class String. And inside the class
String, there are Methods to manipulate strings, such as finding the
number of chars, or extracting parts of the string. This can get very
complicated. For example, in Java, there are actually two Classes of
strings: One is String, and the other is StringBuffer. Which one to use
depends on whether you intend to change the data.
So, a simple code like this in normal languages:
a = a string;
b = another one;
c = join(a,b);
print c;
or in lisp style
(set a a string)
(set b another one)
(set c (join a b))
(print c)
becomes in pure OOP languages:
public class test {
public static void main(String[] args) {
String a = new String(a string);
String b = new String(another one);
StringBuffer c = new StringBuffer(40);
c.append(a); c.append(b);
System.out.println(c.toString());
}
}
Here, the new String creates a String object. The new
StringBuffer(40) creates the changeable string object StringBuffer,
with room for 40 chars. append is a method of StringBuffer. It is
used to join two Strings.
Notice the syntax c.append(a), which we can view it as calling
Access lotus notes using Python
Hi, Is it possible to access Lotus notes using Python? Can anyone provide me some pointers? Thanks Sateesh -- http://mail.python.org/mailman/listinfo/python-list
Re: Com object questions
Does IPADDRESSSTRUCT appear anywhere in the makepy-generated module ? Specifically, there should be a RecordMap dict containing any defined Records and their GUID's. Roger Gijs Korremans [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi, I'm still figuring out how I can use the win32com for the use of a com object which I think is made in VB First I've created a file with MakePy Then I used the following code to init the com object: import win32com.client Client = win32com.client.Dispatch(ClientModule.Client) Then, when I want to use a function, for example this one: ipaddr = kddClient.GetLocalIPAddress() I get this error: File C:\Python23\lib\site-packages\win32com\gen_py\0F4570B8-4D39-47CD-84B4-8A424233EEBFx0x1x0.py, line 69, in GetLocalIPAddress return self._ApplyTypes_(11, 1, (36, 0), (), 'GetLocalIPAddress', None,) File C:\Python23\lib\site-packages\win32com\client\__init__.py, line 446, in _ApplyTypes_ return self._get_good_object_(self._oleobj_.InvokeTypes(dispid, 0, wFlags, retType, argTypes, *args),user, resultCLSID) com_error: (-2147024809, 'The parameter is incorrect.', None, None) I don't know which parameter is incorrect because the function doesn't need any parameters and when I try to use a struct for the IP address using the following code: ipaddr = win32com.client.Record(IPADDRESS_STRUCT, Client) I get this message: File C:\Python23\lib\site-packages\win32com\client\__init__.py, line 403, in Record raise ValueError, The structure '%s' is not defined in module '%s' % (name, package) ValueError: The structure 'IPADDRESS_STRUCT' is not defined in module 'module 'win32com.gen_py.0F4570B8-4D39-47CD-84B4-8A424233EEBFx0x1x0' from 'C:\Python23\lib\site-packages\win32com\gen_py\0F4570B8-4D39-47CD-84B4-8A424233EEBFx0x1x0.pyc'' I think this means that there is no struct IPADDRESS_STRUCT defined in the com object but when I'm going to the ComBrowser in PythonWin it is in there. I'm using python 2.3 with pywin32 build 203 Does anybody know what i'm doing wrong? Kind regards, Gijs -- This message has been scanned for viruses and dangerous content by Network Sentry, and is believed to be clean. http://www.networksentry.co.za == Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News== http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- -- http://mail.python.org/mailman/listinfo/python-list
Re: Shift-JIS to UTF-8 conversion
On Fri, May 20, 2005 at 12:16:15AM -0700, [EMAIL PROTECTED] wrote: Hello, I think the answer is basically correct but shift-jis is not a standard part of Python 2.3. Ah, I was fooled --- I tested on Python 2.3, but my packager must have included the codecs you went on to mention. Jeff pgp4qvXpgMoKr.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: Access lotus notes using Python
On 5/23/05, Sateesh [EMAIL PROTECTED] wrote: Hi, Is it possible to access Lotus notes using Python? Can anyone provide me some pointers? http://www.google.com/search?q=python+lotus+notesbtnI=Lucky -- Cheers, Simon B, [EMAIL PROTECTED], http://www.brunningonline.net/simon/blog/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Access lotus notes using Python
The Great 'Sateesh' uttered these words on 5/23/2005 7:14 AM: Hi, Is it possible to access Lotus notes using Python? Can anyone provide me some pointers? Thanks Sateesh Yes, you can... You need the win32all distribution installed and you can access Notes using the COM interface (win32com.client). Google for Lotus Notes Python gave the following as the first match. http://www.dominopower.com/issuesprint/issue28/command.html Dig around. Win32-perl has some nice COM examples for accessing Notes also. You can convert the Perl-win32 examples to Python rather easily without knowing much perl. Cheers, -Kartic -- http://mail.python.org/mailman/listinfo/python-list
Re: Access lotus notes using Python
Sateesh [EMAIL PROTECTED] writes: Hi, Is it possible to access Lotus notes using Python? Can anyone provide me some pointers? jython + LN Java bindings may be usable -- http://www.peter.dembinski.prv.pl -- http://mail.python.org/mailman/listinfo/python-list
Re: Strange behaviour of floating point constants in imported modules
On Mon, 23 May 2005 12:39:00 +0200, Tomasz Lisowski [EMAIL PROTECTED] wrote: Hi, We are distributing our Python application as the short main script (.py file) and a set of modules compiled to the .pyc files. So far, we have always treated .pyc files as portable between platforms, There is no guarantee at all that a .pyc file is good for any purpose outside the machine that produced it. In practice, however, you *should* be able to rely on no surprises if you have the same platform and the same version of Python; do you? How did you transfer the .pyc files from one box to the other? A Windows installer? A ZIP file? FTP using text mode? Plain-text attachments to an e-mail message? but recently we have discovered an annoying problem. In a module, there is the following code fragment: Deg2Rad = math.pi/180.0 angleEPS = 0.5 angle0B = angleEPS*Deg2Rad which calculates 'angle0B' as the angle of a half of a degree, converted to radians. The module has been compiled on an English Windows XP machine, and then tested on a Polish Windows XP workstation. What was our astonishment, when various exceptions started to be raised on a test machine (no problem on the original English-version Windows XP). We have traced them to the fact, that both angleEPS and angle0B were found to be ZERO (!!!), whereas in reality, angle0B is about 0.008. What evidence do you have? Have you disassembled the .pyc file on both boxes and diff'ed the results? Have you computed checksums on both boxes? And this all happened silently, without any error during the import of the module! What's the reason of this error? I start thinking, that it may be related to the fact, that the decimal point on the Enlish Windows XP is the '.' character, and on the Polish one - ','. This is *extremely* unlikely. Firstly, you are (I understand) talking about a .pyc file, that was produced on an English Windows box. Even though the 180.0 and the 0.5 are visible as character strings in the .pyc file, Python sure doesn't use the locale when it loads a .pyc file. Secondly, even if you are talking about a .py file, Python takes absolutely no notice of the locale when it compiles the .py file. Polish programmers write 0.5, not 0,5. Read the language reference manual, section 2.4.5 -- it uses ., not whatever the decimal point character might be in your locale. If it did depend on locale, you would need a locale declaration at the top of the file, if one wanted .py files to be portable internationally; ever seen or heard of such a declaration? Thirdly, if the dot was interpreted as something other than a decimal point, then what? Perhaps assign a tuple (0, 5), or perhaps a syntax error; zero is achieved under what conditions? It's more likely that the .pyc file has been damaged somehow. AFAIK they don't have checksums. Is there a good method to avoid this kind of problems? How to make such distributed modules really portable? Distribute source. HTH, John -- http://mail.python.org/mailman/listinfo/python-list
Re: Multiple selections in Tix Hlist
To answer my own question: HList(selectmode=extended) does all the work for you. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: I want to ask you the most important question of your life. The question is: Are you saved? It is not a question of how good you are, nor if you are a church member, but are you saved? Are you sure you will go to Heaven when you die? The reason some people don't know for sure if they are going to Heaven when they die is because they just don't know. The good news is that you can know for sure you are going to Heaven. May 22, 2005 12:10:55 pm
[EMAIL PROTECTED] poked his little head through the XP firewall and said: THE MOST IMPORTANT QUESTION OF YOUR LIFE This is the most important question of your life. The question is: Are you saved? Yeah! I'm saved! I use Linux! Hallelujah! -- When all you have is a hammer, everything looks like a nail. -- http://mail.python.org/mailman/listinfo/python-list
Re: problem uploading ZIP file tp PyPI
On Mon, 23 May 2005 15:04:27 +1000, richard [EMAIL PROTECTED] wrote: John Machin wrote: FYI, there are a few unreconstructed diehards out here who neither run on a *x platform nor run bleeding-edge Python straight out of last night's CVS. I think you need to pull your head in, mate. The bug you discovered in PyPI is plain and simple a bug in its attempts to discover whether an uploaded ZIP file was generated by distutils. It's a bug. It will get fixed. Get over your damn platform paranoia. That remark was in response to Tony's seemingly *x-centric suggestion to use setup.py --format=gztar which would have presented some difficulties to a Windows-only person. Perhaps I should have festooned it with smileys. In any case it was nothing to do with the bug and nothing to do with you. I think you need to suck *your* scone in, cobber :-) Cheers, John -- http://mail.python.org/mailman/listinfo/python-list
ANNOUNCE: twill v0.7, scriptable Web testing
ANNOUNCING twill v0.7. twill is a simple Web scripting language built on top of Python and mechanize. It's designed for automated testing of Web sites, but it may be useful for anybody who needs to deal with Web sites (with e.g. logins and cookies) in a non-interactive manner. twill is a reimplementation of Cory Dodt's PBP. A twill script looks like this: # go to the /. login page go http://slashdot.org/login.pl # fill in the form fv 1 unickname test fv 1 upasswd test submit # ok, there's no such account ;). show error HTML. show --- This is the first public release of twill, version 0.7. (Tagline: It seems usable to me, but then I'm its author.) With this release, I'm looking for general feedback on usability, as well as suggestions on additional use cases. Download directly here: http://darcs.idyll.org/~t/projects/twill-0.7.tar.gz Documentation is online at http://www.idyll.org/~t/www-tools/twill.html --- Miscellaneous details: twill is implemented in Python and uses pyparsing and mechanize. In addition to the existing simple command language, twill can easily be extended with Python. twill also provides a fairly simple and well-documented wrapper around mechanize. twill scripts can be recorded with maxq, although scripts may require some hand tweaking at the moment. See the twill documentation for more information. twill does not understand JavaScript, I'm sorry to say. --titus, [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Binding the names in a module in a class instance
Jacob H wrote:
Hello all,
I would like to be able to take a module full of class instances,
functions, etc and bind all its names to a separate container class
in
a different module. I have come up with the following way to do it..
[snip]
I feel uneasy about this method. I foresee bad namespace clashes.
What's a better way? :)
Perhaps this is more like what you are looking for:
import stuff # stuff we want to copy
import everything # initially empty module where to store stuff
# loop over each attribute name in stuff
for attr in dir(stuff):
# skip over __special__ attributes, probably don't want them
if attr.startswith('__') and attr.endswith('__'):
continue
value = getattr(stuff, attr)
setattr(everything, attr, value)
You can add more checking for clashes or whatever by looking at the
attribute name (attr) which is a string.
hth,
n
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Re: minidom and DTD
Laszlo Zsolt Nagy wrote: How can I put the !DOCTYPE collection SYSTEM recipes.dtd thing into an XML created by xml.dom.minidom? You should put a DocumentType node into your DocumentNode, and pass a qualifiedName of collection and a systemId of recipes.dtd to the createDocumentType call. Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
re[2]: Com object questions
Does IPADDRESSSTRUCT appear anywhere in the makepy-generated module ? Specifically, there should be a RecordMap dict containing any defined Records and their GUID's. No it's not in the genereted module, but it is in the COM Browser so I'm sure the struct is in the com object Maybe I can find out somewhere what the GUID's is and put it in the RecodMap manually? Roger Gijs Korremans [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Hi, I'm still figuring out how I can use the win32com for the use of a com object which I think is made in VB First I've created a file with MakePy Then I used the following code to init the com object: import win32com.client Client = win32com.client.Dispatch(ClientModule.Client) Then, when I want to use a function, for example this one: ipaddr = kddClient.GetLocalIPAddress() I get this error: File C:\Python23\lib\site-packages\win32com\gen_py\0F4570B8-4D39-47CD-84B4-8A424233EEBFx0x1x0.py, line 69, in GetLocalIPAddress return self._ApplyTypes_(11, 1, (36, 0), (), 'GetLocalIPAddress', None,) File C:\Python23\lib\site-packages\win32com\client\__init__.py, line 446, in _ApplyTypes_ return self._get_good_object_(self._oleobj_.InvokeTypes(dispid, 0, wFlags, retType, argTypes, *args),user, resultCLSID) com_error: (-2147024809, 'The parameter is incorrect.', None, None) I don't know which parameter is incorrect because the function doesn't need any parameters and when I try to use a struct for the IP address using the following code: ipaddr = win32com.client.Record(IPADDRESS_STRUCT, Client) I get this message: File C:\Python23\lib\site-packages\win32com\client\__init__.py, line 403, in Record raise ValueError, The structure '%s' is not defined in module '%s' % (name, package) ValueError: The structure 'IPADDRESS_STRUCT' is not defined in module 'module 'win32com.gen_py.0F4570B8-4D39-47CD-84B4-8A424233EEBFx0x1x0' from 'C:\Python23\lib\site-packages\win32com\gen_py\0F4570B8-4D39-47CD-84B4-8A424233EEBFx0x1x0.pyc'' I think this means that there is no struct IPADDRESS_STRUCT defined in the com object but when I'm going to the ComBrowser in PythonWin it is in there. I'm using python 2.3 with pywin32 build 203 Does anybody know what i'm doing wrong? Kind regards, Gijs Kind regards, Gijs -- This message has been scanned for viruses and dangerous content by Network Sentry, and is believed to be clean. http://www.networksentry.co.za -- http://mail.python.org/mailman/listinfo/python-list
Re: minidom and DTD
Martin v. Löwis wrote: Laszlo Zsolt Nagy wrote: How can I put the !DOCTYPE collection SYSTEM recipes.dtd thing into an XML created by xml.dom.minidom? You should put a DocumentType node into your DocumentNode, and pass a qualifiedName of collection and a systemId of recipes.dtd to the createDocumentType call. That worked, thank you. -- http://mail.python.org/mailman/listinfo/python-list
Re: first release of PyPy
Alex Stapleton wrote: The question still remains, can it run it's self? ;) I think they try, every once in a while, to self host. The only problem at this stage of the game is the ~2000x speed slowdown. Using that figure, a five second startup time for PyPy on CPython would take about 3 hours for PyPy on PyPy on CPython (5s*2000). Running a 1 second (on CPython) Python program would take a month and a half for PyPy on PyPy on CPython. (1s*2000*2000) Once they get the speed issue licked, the self hosting problems should be no trouble. ;) -- http://mail.python.org/mailman/listinfo/python-list
Re: What are OOP's Jargons and Complexities?
Xah Lee [EMAIL PROTECTED] writes:
So now we find out that Xah Lee is as ignorant of other programming
languages as he is of Python and Perl.
In advanced languages such as LISP family, it is not uncommon to define
functions inside a function. For example:
subroutine f (x1, x2, ...) {
variables...
subroutine f1 (x1...) {...}
subroutine f2 (x1...) {...}
}
Nested subroutines date back to Algol, which was first specified in
the 50s.
So now, a_surface is no longer viewed as a subroutine, but a boxed set
of things centered around a piece of data. All functions that work on
the data are included in the boxed set. This paradigm possible in
functional languages has refined so much so that it spread to other
groups and became known as Object Oriented Programing, and complete
languages with new syntax catered to such scheme emerged.
Actually, classes and other OO concepts come out of simulation programming,
not as an outgrowth of nested functions. Most of the features one
associates with OO languages were present in Simula.
Function nesting and classes were viewed as independent features. Some
OO languages support nesting, others don't. I think it was Grace Murray
Hopper commenting on Ada who said that With classes, nesting is for the
birds.
This style of programing and language have become so fanatical that in
such dedicated languages like Java, everything in the language are
Classes.
Strictly speaking, this isn't true of *any* language. Even the most
fanatical of languages distinguish between classes, objects and
methods.
But IIRC, Java comes with a set of low-level types that don't have
classes associated with them.
This Object Oriented Programing style and dedicated languages (such as
C++, Java)
This is pretty sloppy english. You imply that C++, like Java, is pure OO
language - meaning that there are no freestanding functions or variables.
That's false.
have become a fad like wild fire among the programing mass
of ignoramuses in the industry. Partly because of the data-centric new
perspective, partly because the novelty and mysticism of new syntax and
jargonization.
Actually, C++ became popular because it promised access to the power of
OO programming while leveraging the programmers familiarity with C. In
reality, it combined the worst features of both. Java became popular
because it fixed some of the problems with C++ while leveraging
programmers familiarity with C++ and promising run anywhere capability.
Personally, I think that these two languages are good examples of
someones ability to design a popular language being much better than
their ability to design a good language. But that's a matter of opinion,
and as such is debatable.
It is especially hyped by the opportunist Sun Microsystems with the
inception of Java, internet, and web applications booms around 1995. At
those times, OOP (and Java) were thought to revolutionize the industry
and solve all software engineering problems, in particular by certain
reuse of components concept that was thought to come with OOP.
At that time, OOP was pushing 30 years old. Some people were using it
and getting that component reuse that it promised. Others were using
it and discovering that designing reusable classes is *hard*. It was
clear to pretty much everyone that OOP wasn't a silver bullet.
We now know that the jargon Class is originally and effectively just a
boxed set of data and subroutines, all defined inside a subroutine. And
the jargon Object is just a variable that has been set to this super
subroutine. And the inner subroutines are what's called Methods.
This is simply ludicruously wrong.
to be continued tomorrow.
Please don't waste our time.
mike
--
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Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information.
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detached subprocess
After struggling with os.spawnxxx to get a detached process I tried using Pyhton2.4's new subprocess module. I struggled with that as well even when trying to use the creation flags for DETACHED_PROCESS 0x8 and CREATE_NEW_PROCESS_GROUP = 0x200 I am using the following cgi script parent.cgi #!c:/python24/python.exe -u print 'content-type: text/plain' print print 'DONE' import subprocess pid = subprocess.Popen(['c:/python24/pythonw.exe', 'c:\\tmp\\child.py', 'arg1', 'arg2'], creationflags=0x208).pid print pid #end of parent script child is a simple time delay #child.py import time, sys, os time.sleep(10) print 'stdout IN THE CHILD' print sys.stderr, 'stderr IN THE CHILD' #end of child When I run the parent.cgi script through apache I see no output in the browser for 10 seconds; when the child dies (as observed using procexp) I see the expected DONE 3256 In other words it seems impossible to get standard subprocess.py to detach the child process properly. However, if I hack subprocess.py to alter the bInheritHandles flag passed into CreateProcess (line 718) from the constant 1 to not (creationflags 0x8) and 1 or 0 Is this a buglet or a feature request? It seems subprocess punts on closefds for mswindows, but setting bInheritHandles to 0 seems to work fine ie when it is 0 my test seems to indicate that the parent has finished and gone to heaven long before the child ends its sleep. Of course it may be that it's just the handles that are being held. -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
Re: blabla
Noud Aldenhoven schrieb:
Python rulz and sorry for this spam...
news.test is made for testing :)
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E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
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Re: Optimise Europython competition
In article [EMAIL PROTECTED], Carl Friedrich Bolz [EMAIL PROTECTED] wrote: Jacob Hallen wrote: 2. A track should be continuous. Each track that is continuous gives you 10 points. What exactly do you mean by continuous track? Continuous means that from the time of the first talk in the track until all talks in the track have been given, there will be a talk from the track in each time slot (in exceptional cases there can be an empty time slot inserted to make things fit, but usually that is not needed.) The main reason for this rule is that some people only come for a few talks in a specific track, and they don't want to have to stay 3 days because we scheduled some on Monday morning and the rest on Wednesday morning. Last year we even had 2 people driving down from Norway, paying the 270 Euro on-site fee, just to listen to a single talk. They then had a chat with the speaker and went home, quite happy with their conference. Jacob Hallén -- -- http://mail.python.org/mailman/listinfo/python-list
Re: python24.zip
Martin v. Löwis wrote: Dieter Maurer wrote: Really? Is the interpreter unable to call C functions (stat for example) to determine whether an object exists before it puts it on path. What do you mean, unable to? It just doesn't. In fact, the interpreter doesn't necessarily know when it is affecting the path. Could it? Perhaps, if somebody wrote a patch. Would the patch be accepted? Perhaps, if it didn't break something else. In the past, there was a silent guarantee that you could add items to sys.path, and only later create the directories behind these items. I don't know whether people rely on this guarantee. If you only checked lost files/directories on the path a few seconds later than the last time you checked, you might be able to drive this failed open time down drastically without seriously affecting those who care. Such an implementation should have a call which allowed you to clear the timestamps for the known bad entries. --Scott David Daniels [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: detached subprocess
Robin Becker wrote: . before the child ends its sleep. Of course it may be that it's just the handles that are being held. After further tests with procexp it seems that the parent is allowed to die, but its output is held up (perhaps apache is waiting on an eof) until the child dies. It would seem prudent to allow the mswindows version to control the bInheritHandles flag in some way. -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
No encodings after freezing
Hi.
I have the following script (for example):
#!/usr/bin/python
text = 'Hallo'
text_new = text.encode('utf_8')
print text_new
The I tried to freeze this script with cx_freeze 3.0.1 (command
./FreezePython example.py).
Everything worked finde, a binary was created correctly.
But everytime I run this binary the utf-8 encoding cannot be found.
(Also any other encoding like iso8859_15 cannot be found...)
What am I doing wrong?
Thank.
Best regards,
Markus
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Re: SQL Query via python
Steve Holden wrote: Jeff Elkins wrote: ... cursor.execute(SELECT name, month, day ,category, city FROM bday WHERE %s = %s, (arg1,arg2)) No results. However, if I hardcode the WHERE argument with a field name: cursor.execute(SELECT name, month, day ,category, city FROM bday WHERE month = %s, (arg2,)) Works. Because here you aren't trying to parameterize the name of a database object. How can I code the left side of the WHERE clause so I can pass an arbitrary field name to search on? You might have to construct the SQL statement to include the names of tables and columns. It's still better to use parameterization for data substitutions, though, because then you don't have to perform any quoting. I'm sure Steve knows this, but for those wondering: A database system will often produce an optimized execution plan from the first argument (and cache that plan). The string had better be good enough for the DBMS to determine how to best perform the query. This means only data can be parameterized, not table or field names). The query plan includes things like which indexes to use and what tables to access in what order. --Scott David Daniels [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: None module reference
Stefan Seefeld wrote:
In a python module of mine I import system modules
('sys', say) and then use them from within some functions.
However, during program termination I'm calling
one such function and the module reference ('sys')
is 'None' !
Are you running any daemon threads? This can generally happen when a
daemon thread continues to access module globals during the interpreter
shutdown sequence. At one stage all globals in all modules are rebound
to None, and there's a chance some of your daemon thread code will
execute just as this is occurring, resulting in that kind of error message.
-Peter
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[00] V-POP3bounce: [EMAIL PROTECTED];Error=[550 Error: Invalid Attachment] [01] Error sending message [1116860878726.2800.mailserver_papl] from [www.pansegroup.com]. ID:SB208 Mail From: python-list@python.org Rcpt To: [EMAIL PROTECTED] Server:smtp4.smtp4u.com [209.120.245.170] [02] The reason of the delivery failure was: 550 Error: Invalid Attachment [05] Here is listed the initial part of the message: Received: from python.org (192.168.1.130:4513) by smtp.pansegroup.com with [V-POP3Mail (Win32/Ix86) ESMTP Server] id SB208 for [EMAIL PROTECTED] from python-list@python.org; Mon, 23 May 2005 20:37:58 +0530 From: python-list@python.org To: [EMAIL PROTECTED] Subject: MAIL TRANSACTION FAILED Date: Mon, 23 May 2005 20:37:36 +0530 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary==_NextPart_000_0012_6513DF42.EC70CFD3 X-Priority: 3 X-MSMail-Priority: Normal -- http://mail.python.org/mailman/listinfo/python-list
Re: What are OOP's Jargons and Complexities?
Mike Meyer wrote: Xah Lee [EMAIL PROTECTED] writes: So now we find out that Xah Lee is as ignorant of other programming languages as he is of Python and Perl. I think you're misreading some of what is being said. Nested subroutines date back to Algol, which was first specified in the 50s. I think the author was speaking in terms of how high a level of a language it is, not necessarily how recent it is. Actually, classes and other OO concepts come out of simulation programming, not as an outgrowth of nested functions. Most of the features one associates with OO languages were present in Simula. Again, I think the author was pointing out that it is an outgrowth logically, not necessarily historically. There is a basic equivalence between a class and a group of functions closed over the same variables. I mention something similar in an IBM DeveloperWorks article here: http://www.ibm.com/developerworks/linux/library/l-highfunc.html Function nesting and classes were viewed as independent features. Some OO languages support nesting, others don't. I think it was Grace Murray Hopper commenting on Ada who said that With classes, nesting is for the birds. Doesn't this quote show the opposite? Strictly speaking, this isn't true of *any* language. Even the most fanatical of languages distinguish between classes, objects and methods. I think the point was that in Java everything is done within the context of a class. You can define methods, but only as a part of a class. You cannot define a function or even a variable that stands on its own. But IIRC, Java comes with a set of low-level types that don't have classes associated with them. But still, it does not allow you, the programmer, to do the same. Jon Learn to program using Linux assembly language http://www.cafeshops.com/bartlettpublish.8640017 -- http://mail.python.org/mailman/listinfo/python-list
Re: SQL Query via python
How about: cursor.execute( SELECT name, month, day ,category, city FROM bday WHERE %(col_name)s = %%s % dict(col_name=arg1), (arg2) ) The %(col_name)s will be replaced by normal Python string substitution, while the %%s will be quoted by the db module. Watch out for SQL injection in arg1, though! Maybe check beforehand that it is a string containing only word characters... Jeff Elkins wrote: I'm attempting to pass an SQL query via the console: $ ./getbd month 05 The arguments get seem to passed correctly (via print statements) and then: cursor.execute ( SELECT name, month, day ,category, city FROM bday WHERE %s = %s ,(arg1,arg2)) No results. However, if I hardcode the WHERE argument with a field name: cursor.execute ( SELECT name, month, day ,category, city FROM bday WHERE month = %s ,(arg2)) It works. How can I code the left side of the WHERE clause so I can pass an arbitrary field name to search on? Thanks, Jeff Elkins -- http://mail.python.org/mailman/listinfo/python-list
Re: SQL Query via python
On Mon, May 23, 2005 at 04:12:31PM +, Austyn Bontrager wrote: How about: cursor.execute( SELECT name, month, day ,category, city FROM bday WHERE %(col_name)s = %%s % dict(col_name=arg1), (arg2) ) The %(col_name)s will be replaced by normal Python string substitution, while the %%s will be quoted by the db module. Watch out for SQL injection in arg1, though! Maybe check beforehand that it is a string containing only word characters... Maybe what you really need is the ability to search for two fields, or both fields? Here's an approach that I usually use: - Write a search function accepting the parameters you search for. - If you fill one of the parameters with None (in SQL: NULL), you don't care for its value - This way, you can narrow your search as much as you like Here's a quick test script, using pysqlite2 to demonstrate the approach. It's also not meant as production code, but at least it only works with SQL parameter binding. - SQLite uses :name for named parameters instead of %(name)s. - locals() is a neat hack to access the local variables as a dictionary #v+ from pysqlite2 import dbapi2 as sqlite con = sqlite.connect(:memory:) cur = con.cursor() cur.execute(create table test(a, b)) cur.execute(insert into test(a, b) values (1, 2)) cur.execute(insert into test(a, b) values (1, 3)) cur.execute(insert into test(a, b) values (2, 3)) def search(a, b): global cur cur.execute( select a, b from test where (:a is null or a=:a) and (:b is null or b=:b) , locals()) return cur.fetchall() print search(2, None) print - * 50 print search(None, 3) print - * 50 print search(2, 3) #v- -- Gerhard -- Gerhard Häring - [EMAIL PROTECTED] - Python, web database development signature.asc Description: Digital signature -- http://mail.python.org/mailman/listinfo/python-list
line-by-line output from a subprocess
I am using the subprocess module to invoke a command-line utility and
process the output.
However, I would like to process the output line-by-line as it is
generated rather than
running the subprocess to completion and THEN processing the results.
So, for instance,
I'd like to write code like this:
all_files = []
import subprocess
subp = subprocess.Popen('dir', stdout=subprocess.PIPE)
for line in subp.stdout:
sys.stdout.print(line)
all_files.append(line)
...and have it print the lines to stdout one-by-one until the entire
list is
collected. (Pretend that 'dir' is VERY slow.)
The communicate() method in subprocess blocks until the subprocess has
exited... I'm sure there is some good reason for this behavior. But how
does
one achieve what I am trying to do?
(PS: this is on Windows... although I'd rather use an OS-agnostic
solution if
one exists.)
-- Michael Chermside
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concurrent access to object file
Hi all! I will build a HTTPServer and dislike that one request is handled at a time (synchronous). So I write: class MyHTTPServer(SocketServer.ThreadingMixIn, BaseHTTPServer.HTTPServer): For log the request and error I create a file and atteched it to the server instance. Then the file log object can be see at RequestHandler instance (self.server.log_file). I overwrite in MyHTTPRequestHandler the methods log_message to write instead of sys.stderr in my log file self.server.log_file. My question is: Is posible that the log file crash (merge lines or some other things) if two or more thread try to write in it simultaneously or the write method of file object has a lock that prevent this? Some other suggestion to get the aproach painted above? Thank in advance Frank -- http://mail.python.org/mailman/listinfo/python-list
Re: first release of PyPy
Rocco Moretti wrote: Alex Stapleton wrote: The question still remains, can it run it's self? ;) This allready worked in the past, though it doesn't at the moment. I think they try, every once in a while, to self host. The only problem at this stage of the game is the ~2000x speed slowdown. Using that figure, a five second startup time for PyPy on CPython would take about 3 hours for PyPy on PyPy on CPython (5s*2000). Running a 1 second (on CPython) Python program would take a month and a half for PyPy on PyPy on CPython. (1s*2000*2000) Once they get the speed issue licked, the self hosting problems should be no trouble. ;) Speed isn't even the biggest problem when running PyPy on itself. PyPy still 'fakes' some objects, e.g. borrows them from the underlying Python. This is mostly the case for things that have direct access to the OS, e.g. files. If you run PyPy on PyPy on CPython you try to fake the faked objects again, which gives trouble. Since we have to handle faked objects differently in the future anyway we decided that at the moment it isn't worth the effort to keep the self-hosting working. Regards, Carl Friedrich -- http://mail.python.org/mailman/listinfo/python-list
execution error
Hello, I'm programing an advanced calculator, and I have many problems with the execution errors, specually with the division by 0. And my question is how can show the execution error whitout exit of the program, showing it in the error output as 2+2 4 3*4 12 6/0 Error: Division per 0 Thank you. -- http://mail.python.org/mailman/listinfo/python-list
Terminating a thread from the parent
Hello, I have an app with embedded Python. Python scripts create their own threads and I need to terminate these threads at the point where the user wants to leave the application. I use threading.Thread as base classes. I have tried to use call the join method of the python thread objects from C++. But although the call succeeds, the threads don't exit. What is the proper way of doing this ? (e.g. how does the python shell do this ? ) Thanks in advance, Devrim. -- http://mail.python.org/mailman/listinfo/python-list
Re: execution error
Ximo [EMAIL PROTECTED] writes: And my question is how can show the execution error whitout exit of the program, showing it in the error output as... 6/0 Error: Division per 0 Trap the ArithmeticError exception and go by the name of the exception class. See the language ref manual about how exceptions work. -- http://mail.python.org/mailman/listinfo/python-list
Re: execution error
Ximo And my question is how can show the execution error whitout exit Ximo of the program, showing it in the error output as You need to catch ZeroDivisionError. Here's a trivial example: try: ... 6/0 ... except ZeroDivisionError: ... print whoops! divide by zero... ... whoops! divide by zero... Skip -- http://mail.python.org/mailman/listinfo/python-list
Re: Running a python program during idle time only
Thanks for all the replies. I did try using nice under windows. I created a java program that would just loop and print numbers on the screen. Even when I ran that simple program with nice, (lets call it program A) as soon as I started the program the cpu went all the way to 100% usage. Then when I ran another program that did the same thing (lets call it program B), program A halted to let B finish, then it started again. Nevertheless it still hogged all the cpu while I was using the computer. For my indexing program I just wrote a simple python program and called on the python os.walk() method to iterate through the drive and then it connects to a database to store some information. Then I wrote a simple interface to connect to the database to search for files using visual basic. Once everything is indexed it works fine, but it would be nice to have the program looping through and indexing the files all the time to account to file updates, deletes, and relocation, but without hurting the performance when I'm using the computer. So really what I am looking for is some way to have the program only start indexing and crawling through the hd after 5 minutes of no user interaction with the computer. I'm going to take a look at this CPU load possibility. But I'm afraid that this will work similarly to nice in which case it will let the program kick in when the CPU isn't being used heavily, but I might still be using the computer. thanks once again! -los -- http://mail.python.org/mailman/listinfo/python-list
Re: What are OOP's Jargons and Complexities?
Paul McGuire coughed up:
Is this supposed to be some sort of wake-up call or call-to-arms to
all the CS lemmings who have been hoodwinked by Sun into the realm of
jargon over substance?
...[rip]...
You certainly seem to have a lot of energy and enthusiasm for these
topics. It would be nice if you could find a way to illuminate and
educate, without falling prey to the urge to pontificate. If you
really have some points to make, put away the breathless and profane
debate style - it just gets in the way of anything you're trying to
say. Really, we are *mostly* adults here, and can make up our own
minds on most things.
Of the many things that bother me about his post is his tendency to voice
his conclusions as if they would be universally arrived at given his data.
{shrug} Paying attention to this guy's post has proven to be a complete
WOT.
--
I've seen this a few times--Don't make this mistake:
Dwight: This thing is wildly available.
Smedly: Did you mean wildly, or /widely/ ?
Dwight: Both!, said while nodding emphatically.
Dwight was exposed to have made a grammatical
error and tries to cover it up by thinking
fast. This is so painfully obvious that he
only succeeds in looking worse.
--
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Re: Running a python program during idle time only
I think you can keep your sleep commands in your program to keep it from hogging the cpu even when you are running it as nice. You know, even more important than cpu load (since your indexer is accessing the hard drive, is hard drive access..) You can monitor the bytes / second going to the hard drives using a WMI query similar to the one that gives you LoadPercentage for a cpu. If something Is trying to read and write to the hard drive, and your indexer is going at the same time, hard drive head contention can slow down both processess to a crawl. (Say your program is in C:/apps and another program is simutaneously trying to read from C:/data... the heads have to seek back and forth between the two spots on the hard drive, and it's much faster to do all the C:/apps accesses and then later do all the C:/data accesses.) So I think my approach would be to have the indexer take about 10% of cpu load while it is active, and as soon as another process is doing enough reading / writing to the hard drive, stop and wait for about five minutes... then continuing. The screen saver idea is another good one. I found this the other day... http://homepage.hispeed.ch/py430/python/win32screensaver-0.3.2.zip The problem is that any potential user that really likes their pretty screen saver (Helios under Ubuntu... droool slurp.) then they can't have both your indexer and their pretty screensaver active during idle time. -Jim On 23 May 2005 10:32:18 -0700, los [EMAIL PROTECTED] wrote: Thanks for all the replies. I did try using nice under windows. I created a java program that would just loop and print numbers on the screen. Even when I ran that simple program with nice, (lets call it program A) as soon as I started the program the cpu went all the way to 100% usage. Then when I ran snip -- http://mail.python.org/mailman/listinfo/python-list
Fwd: Running a python program during idle time only
I think you can keep your sleep commands in your program to keep it from hogging the cpu even when you are running it as nice. You know, even more important than cpu load (since your indexer is accessing the hard drive, is hard drive access..) You can monitor the bytes / second going to the hard drives using a WMI query similar to the one that gives you LoadPercentage for a cpu. If something Is trying to read and write to the hard drive, and your indexer is going at the same time, hard drive head contention can slow down both processess to a crawl. (Say your program is in C:/apps and another program is simutaneously trying to read from C:/data... the heads have to seek back and forth between the two spots on the hard drive, and it's much faster to do all the C:/apps accesses and then later do all the C:/data accesses.) So I think my approach would be to have the indexer take about 10% of cpu load while it is active, and as soon as another process is doing enough reading / writing to the hard drive, stop and wait for about five minutes... then continuing. The screen saver idea is another good one. I found this the other day... http://homepage.hispeed.ch/py430/python/win32screensaver-0.3.2.zip The problem is that any potential user that really likes their pretty screen saver (Helios under Ubuntu... droool slurp.) then they can't have both your indexer and their pretty screensaver active during idle time. -Jim On 23 May 2005 10:32:18 -0700, los [EMAIL PROTECTED] wrote: Thanks for all the replies. I did try using nice under windows. I created a java program that would just loop and print numbers on the screen. Even when I ran that simple program with nice, (lets call it program A) as soon as I started the program the cpu went all the way to 100% usage. Then when I ran another program that did the same thing (lets call it program B), program A halted to let B finish, then it started again. Nevertheless it still hogged all the cpu while I was using the computer. For my indexing program I just wrote a simple python program and called on the python os.walk() method to iterate through the drive and then it connects to a database to store some information. Then I wrote a simple interface to connect to the database to search for files using visual basic. Once everything is indexed it works fine, but it would be nice to have the program looping through and indexing the files all the time to account to file updates, deletes, and relocation, but without hurting the performance when I'm using the computer. So really what I am looking for is some way to have the program only start indexing and crawling through the hd after 5 minutes of no user interaction with the computer. I'm going to take a look at this CPU load possibility. But I'm afraid that this will work similarly to nice in which case it will let the program kick in when the CPU isn't being used heavily, but I might still be using the computer. thanks once again! -los -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: python24.zip
Martin v. Löwis wrote: Now I remember what makes this stuff really difficult: PEP 302 introduces path hooks (sys.path_hooks), allowing imports from other sources than files. So the items on sys.path don't have to be directory or file names at all, and importing from them may still succeed if though stat fails. so is there implication of multiplicative behaviour? ie if we have N importers and F leading failure syspath entries before the correct one is found do we get order N*F failed stats/opens etc etc? -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
how do you return an exit code with out exiting
I wrote a simple python program that scrapes a web page every 30 secons and dumps the result in a data base. I want to use my linux distros build in init tools to run the script in the back ground as a daemon. The problem is when I call the daemon script to background the program I wrote it just hangs, waiting for my program to exit 1 or 0. My program never does exits because its looping every 30 seconds. Is there a way I can pass an exit value with out actualy exiting? or is there are better way to do this? Thanks -- Matthew Thorley -- http://mail.python.org/mailman/listinfo/python-list
Re: Access lotus notes using Python
Kartic wrote: The Great 'Sateesh' uttered these words on 5/23/2005 7:14 AM: Is it possible to access Lotus notes using Python? Can anyone provide me some pointers? Yes, you can... You need the win32all distribution installed and you can access Notes using the COM interface (win32com.client). There could be even more cross-platform programming options depending what access Lotus Notes really means for the original poster. Depending on configuration a Domino server might have several Internet protocol services for accessing Notes data (POP3, IMAP, LDAP, etc.). Ciao, Michael. -- http://mail.python.org/mailman/listinfo/python-list
Re: how do you return an exit code with out exiting
On 2005-05-23, Matthew Thorley [EMAIL PROTECTED] wrote: I wrote a simple python program that scrapes a web page every 30 secons and dumps the result in a data base. I want to use my linux distros build in init tools to run the script in the back ground as a daemon. The problem is when I call the daemon script to background the program I wrote it just hangs, waiting for my program to exit 1 or 0. My program never does exits because its looping every 30 seconds. Is there a way I can pass an exit value with out actualy exiting? No. or is there are better way to do this? Yes. To be a well-behavied daemon, you need to do the things described in this howto: http://www.linuxprofilm.com/articles/linux-daemon-howto.html Here are a couple references on how to do this in Python: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731 http://homepage.hispeed.ch/py430/python/ -- Grant Edwards grante Yow! Intra-mural sports at results are filtering visi.comthrough th' plumbing... -- http://mail.python.org/mailman/listinfo/python-list
Re: What are OOP's Jargons and Complexities?
Xah Lee [EMAIL PROTECTED] writes: [snap] put it on your blog -- http://www.peter.dembinski.prv.pl -- http://mail.python.org/mailman/listinfo/python-list
Re: Terminating a thread from the parent
DE wrote: I have an app with embedded Python. Python scripts create their own threads and I need to terminate these threads at the point where the user wants to leave the application. I use threading.Thread as base classes. I have tried to use call the join method of the python thread objects from C++. But although the call succeeds, the threads don't exit. join() waits until the thread terminates, but it doesn't cause it to terminate. What is the proper way of doing this ? (e.g. how does the python shell do this ? ) You have to poll for a termination request in the thread's main loop, and have the thread terminate itself (by returning from the target function or from the run() method, depending on which technique you used to create the Thread in the first place). Threads cannot be forcibly terminated**. There are numerous examples of this in the archives and probably a Cookbook recipe or two about it, if you look. Otherwise someone can post an example here. -Peter ** The exception is Threads on which .setDaemon(True) has been called, which will terminate immediately when the main thread exits (i.e. when the entire process terminates), though that might not be helpful to you in your particular situation. -- http://mail.python.org/mailman/listinfo/python-list
Re: first release of PyPy
Mike Meyer wrote: Basically, there's a *lot* of history in programming languages. I'd hate to see someone think that we went straight from assembler to C, or that people didn't understand the value of dynamic languages very early. Yes, although I wasn't following historical events; I was following the trends of what programmers in general have used. Theory has always been far ahead of practice... and generalizations are never correct. ;-) Shane -- http://mail.python.org/mailman/listinfo/python-list
Re: ANNOUNCE: twill v0.7, scriptable Web testing
This is exactly the sort of thing ive been trying to avoid implementing my self for ages :) I will take it for a spin and see how it behaves, looks great though. On 23 May 2005, at 05:07, C. Titus Brown wrote: ANNOUNCING twill v0.7. twill is a simple Web scripting language built on top of Python and mechanize. It's designed for automated testing of Web sites, but it may be useful for anybody who needs to deal with Web sites (with e.g. logins and cookies) in a non-interactive manner. twill is a reimplementation of Cory Dodt's PBP. A twill script looks like this: # go to the /. login page go http://slashdot.org/login.pl # fill in the form fv 1 unickname test fv 1 upasswd test submit # ok, there's no such account ;). show error HTML. show --- This is the first public release of twill, version 0.7. (Tagline: It seems usable to me, but then I'm its author.) With this release, I'm looking for general feedback on usability, as well as suggestions on additional use cases. Download directly here: http://darcs.idyll.org/~t/projects/twill-0.7.tar.gz Documentation is online at http://www.idyll.org/~t/www-tools/twill.html --- Miscellaneous details: twill is implemented in Python and uses pyparsing and mechanize. In addition to the existing simple command language, twill can easily be extended with Python. twill also provides a fairly simple and well-documented wrapper around mechanize. twill scripts can be recorded with maxq, although scripts may require some hand tweaking at the moment. See the twill documentation for more information. twill does not understand JavaScript, I'm sorry to say. --titus, [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: how do you return an exit code with out exiting
thanks thats perfect! Grant Edwards wrote: On 2005-05-23, Matthew Thorley [EMAIL PROTECTED] wrote: I wrote a simple python program that scrapes a web page every 30 secons and dumps the result in a data base. I want to use my linux distros build in init tools to run the script in the back ground as a daemon. The problem is when I call the daemon script to background the program I wrote it just hangs, waiting for my program to exit 1 or 0. My program never does exits because its looping every 30 seconds. Is there a way I can pass an exit value with out actualy exiting? No. or is there are better way to do this? Yes. To be a well-behavied daemon, you need to do the things described in this howto: http://www.linuxprofilm.com/articles/linux-daemon-howto.html Here are a couple references on how to do this in Python: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/278731 http://homepage.hispeed.ch/py430/python/ -- http://mail.python.org/mailman/listinfo/python-list
Re: what is addMethod ?
[EMAIL PROTECTED] a écrit : Thnks, I wrongly took it for a standard method; I found where it is defined (it's part of the project); Then it would be nice to fully answer your question, so everyone may know what's this method and what it does (and what project it comes from). -- http://mail.python.org/mailman/listinfo/python-list
Re: blabla
Peter Maas wrote: Noud Aldenhoven schrieb: Python rulz and sorry for this spam... news.test is made for testing :) I really should appoligize for this spam, I though I couldn't post it but actually it did. I was trying to get Pan running, but I couldn't find a place where I could put my authorisation for the smtp server. So I though I could post something and it would never be sent. But it did... Sorry, Jwaixs -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie python design question
Michael a écrit :
Hi,
I'm trying to write a script to parse a .cpp file and begin to create a
'translational unit'.
To do this i need to:
Go through the file and remove all 'C' comments as
/* Comment 1*/
(can be on multiple lines)
Go through and remove all 'C++' comments, anything between // and '\n' char.
The start at the top, and work the way through, with the following valid
terms:
#include filename
#include filename
- copy the contents of filename to this point in the file and continue.
#define X Y
-Store the term X,Y in DefineDictionary, then later if X is encountered,
substitute Y.
namespace n
{
};
-a namespace, can contain classes, functions and sub-namespaces
class c
{
};
-a class.
If i were to process this in C++, i would create some form of statemachine,
similar to a regex engine... I would just like some ideas on the easiest way
to implment this in python!!
I have no real answer, but well:
- there's a regexp module in the stdlib
- there's a quite nice FSM implementation on the Python Cookbook
- there are many Python-based parser generators
And I would of course recommand the reading of Text Processing in
Python...
HTH
Bruno
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no win32com.client
In 2.4.1 the following is generated from a script that ran in 2.2: import sys, string, os, win32com.client ImportError: No module named win32com.client thanks for any input, Phil -- http://mail.python.org/mailman/listinfo/python-list
Re: Memory errors with large zip files
On 23 May 2005 09:28:15 -0700, Marcus Lowland [EMAIL PROTECTED] wrote: Thank for the detailed reply John! I guess it turned out to be a bit tougher than I originally thought :-) Reading over your links, I think I better not attempt rewriting the zipfile.py program... a little over my head :-). The best solution, from everything I read seems to be calling an unzipper program from a subprocess. I assume you mean using execfile()? I can't think of another way. Errr ... no, execfile runs a Python source file. Check out the subprocess module: 6.8 subprocess -- Subprocess management New in version 2.4. The subprocess module allows you to spawn new processes, connect to their input/output/error pipes, and obtain their return codes. This module intends to replace several other, older modules and functions, such as: os.system os.spawn* os.popen* popen2.* commands.* -- http://mail.python.org/mailman/listinfo/python-list
Re: no win32com.client
plsullivan wrote: In 2.4.1 the following is generated from a script that ran in 2.2: import sys, string, os, win32com.client ImportError: No module named win32com.client thanks for any input, Phil Have you downloaded the win32com extensions? http://starship.python.net/crew/mhammond/win32/Downloads.html -- http://mail.python.org/mailman/listinfo/python-list
Problem with DispatchWithEvents
Traceback (most recent call last): File windowedfax.py, line 223, in OnClick self.iexplore = DispatchWithEvents(InternetExplorer.Application, eventHandling) File C:\Python24\Lib\site-packages\win32com\client\__init__.py, line 268, in DispatchWithEvents user_event_class.__init__(instance) File windowedfax.py, line 178, in __init__ this.iexploreInstance = self NameError: global name 'this' is not defined Output completed (18 sec consumed) - Normal Termination I am running Python 2.4 with the most recent 2.4 win32all package installed. This is straight from the installer. I did a clean installation of everything. This was working before I tried an ActivePython distribution. It stopped working because ActivePython did not seem to support my SSL usage in urllib, so I returned to a stock python distribution. The line where I call DispatchWithEvents is like this: iexplore = DispatchWithEvents(InternetExplorer.Application, eventHandling) where eventHandling is a functioning class to that purpose. Thanks for any help, in advance. -- http://mail.python.org/mailman/listinfo/python-list
Re: What are OOP's Jargons and Complexities?
Jonathan Bartlett wrote: I think you're misreading some of what is being said. I think you're giving the author too much credit. -- Erik Max Francis [EMAIL PROTECTED] http://www.alcyone.com/max/ San Jose, CA, USA 37 20 N 121 53 W AIM erikmaxfrancis Love is the true price of love. -- George Herbert -- http://mail.python.org/mailman/listinfo/python-list
Re: line-by-line output from a subprocess
Okay, so the reason what you're trying to do doesn't work is that the readahead buffer used by the file iterator is 8192 bytes, which clearly might be too much. It also might be because the output from the application you're running is buffered, so you might have to do something about that as well. Anyway, if the output from the child application is unbuffered, writing a generator like this would work: def iterread(fobj): stdout = fobj.stdout.read(1) # or what you like data = while stdout: data += stdout while \n in data: line, data = data.split(\n, 1) yield line stdout = fobj.stdout.read(1) if data: yield data, -- http://mail.python.org/mailman/listinfo/python-list
Re: no win32com.client
Hi ! Or : http://sourceforge.net/project/showfiles.php?group_id=78018 @-salutations -- Michel Claveau -- http://mail.python.org/mailman/listinfo/python-list
Re: first release of PyPy
Carl Friedrich Bolz wrote: Rocco Moretti wrote: Alex Stapleton wrote: The question still remains, can it run it's self? ;) This allready worked in the past, though it doesn't at the moment. I think they try, every once in a while, to self host. The only problem at this stage of the game is the ~2000x speed slowdown. Using that figure, a five second startup time for PyPy on CPython would take about 3 hours for PyPy on PyPy on CPython (5s*2000). Running a 1 second (on CPython) Python program would take a month and a half for PyPy on PyPy on CPython. (1s*2000*2000) Once they get the speed issue licked, the self hosting problems should be no trouble. ;) Speed isn't even the biggest problem when running PyPy on itself. PyPy still 'fakes' some objects, e.g. borrows them from the underlying Python. Does it mean You create an RPython object that runs on top of CPython, but is just an RPython facade wrapped around a CPython object? So You have four kinds of Pythons: RPy - translateable into LL code APy - non-translateable but interpretable by translated RPy RPy* - non-translateable but consistent interface with RPy. Calls APy* APy* - not translateable and not interpreteable by translated RPy Selfhosting would imply vanishing RPy* and APy*. But the problem seems to be that selfhosting must somehow be broken because the system needs to interact with OS-dependend librarys. As long as You run the system upon CPython the problem does not occur but once You drop it, a kind of extension objectspace must be created which is translated into code with nice interfacing properties. Or do You think that RPython translations will be sufficient and another ext-objectspace is just useless epi-cycling? Kay -- http://mail.python.org/mailman/listinfo/python-list
Re: Access lotus notes using Python
The Great 'Michael Ströder' uttered these words on 5/23/2005 2:43 PM: Kartic wrote: The Great 'Sateesh' uttered these words on 5/23/2005 7:14 AM: Is it possible to access Lotus notes using Python? Can anyone provide me some pointers? Yes, you can... You need the win32all distribution installed and you can access Notes using the COM interface (win32com.client). There could be even more cross-platform programming options depending what access Lotus Notes really means for the original poster. Depending on configuration a Domino server might have several Internet protocol services for accessing Notes data (POP3, IMAP, LDAP, etc.). Ciao, Michael. So I guess it upto the Sateesh to tell whether he needs more information or not. -- http://mail.python.org/mailman/listinfo/python-list
Re: overhead of starting threads
How much you gain by starting threads is also determined by what you're doing in those threads. Remember (or learn): In CPython only one thread at a time can execute python code, so depending on your task threading might gain you little. If you're doing I/O or calling functions written in C (and if they release the Global Intepreter Lock [GIL]) you might gain a lot by using threads. As for overhead: profile, profile, profile. You'll have to do sample runs and find your sweet-spot. It all depends on what you're doing in the threads. -- http://mail.python.org/mailman/listinfo/python-list
Re: python24.zip
Robin Becker wrote: ie if we have N importers and F leading failure syspath entries before the correct one is found do we get order N*F failed stats/opens etc etc? No. Each path hook is supposed to provide a decision as to whether this is a useful item on sys.path only once; the importer objects themselves are then cached (with some operation to clear the cache). Each path hook may apply its own algorithm, e.g. looking at the syntactical structure or the type of the sys.path item, so not all of them need stat/open to determine whether they support the item. The multiplicative behaviour rather results from the different type of modules: each path item may carry .py, .pyc, .so, module.so, etc. Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: line-by-line output from a subprocess
On 23 May 2005 13:22:04 -0700, Simon Percivall [EMAIL PROTECTED] wrote: Okay, so the reason what you're trying to do doesn't work is that the readahead buffer used by the file iterator is 8192 bytes, which clearly might be too much. It also might be because the output from the application you're running is buffered, so you might have to do something about that as well. Anyway, if the output from the child application is unbuffered, writing a generator like this would work: def iterread(fobj): stdout = fobj.stdout.read(1) # or what you like data = while stdout: data += stdout while \n in data: line, data = data.split(\n, 1) yield line stdout = fobj.stdout.read(1) if data: yield data, Or, doing the same thing, but with less code: def iterread(fobj): return iter(fobj.readline, '') Haven't tried this on subprocess's pipes, but I assume they behave much the same way other file objects do (at least in this regard). Jp -- http://mail.python.org/mailman/listinfo/python-list
Re: Comparing 2 similar strings?
Hello William, William Park [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED]... How do you compare 2 strings, and determine how much they are close to each other? ... If your strings are between 1 and 16 Kb, look at GetReuse SDK: http://getreuse.com/sdk/ It has Perl and Python bindings. You might be interested in the latter as you posted to comp.lang.python. I can't disclosure the algorithm. Here is an excerpt from the home page: The formula for the calculation of the similarity is based on the scientific research. Any other good method of calculations should produce results that are equivalent in some terms to the GetReuse results. -- olpa@ http://datahansa.com/ XML publishing and documentation management http://uucode.com/blog/ Generative Programming, XML, TeX, Scheme -- http://mail.python.org/mailman/listinfo/python-list
Re: Comparing 2 similar strings?
Hello, Scott David Daniels [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED]... William Park wrote: How do you compare 2 strings, and determine how much they are close to each other? Here's a really weird idea: Measure the size difference between the pair of strings compressed together and compressed separately. The idea isn't weird. The only problem is that naive approach failed. compress(a,b) != compress(b,a). Having an assumption that compressing is a good approximation for the Kolmogorov complexity, the correct formula is a bit more complicated. -- olpa@ http://datahansa.com/ XML publishing and documentation management http://uucode.com/blog/ Generative Programming, XML, TeX, Scheme -- http://mail.python.org/mailman/listinfo/python-list
Re: overhead of starting threads
Simon Percivall wrote:
How much you gain by starting threads is also determined by what you're
doing in those threads. Remember (or learn): In CPython only one thread
at a time can execute python code, so depending on your task threading
might gain you little. If you're doing I/O or calling functions written
in C (and if they release the Global Intepreter Lock [GIL]) you might
gain a lot by using threads.
I wasn't asking about wether to use threads or not, I already am - for
several long running partialy I/O bound tasks.
As for overhead: profile, profile, profile. You'll have to do sample
runs and find your sweet-spot. It all depends on what you're doing in
the threads.
I haven't had much luck with the profile module in the standard library.
It only shows me data from the main thread. Is there a better way of
profile heavily threaded code?
Will McGugan
--
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.join( [ {'*':'@','^':'.'}.get(c,None) or chr(97+(ord(c)-84)%26) for c
in jvyy*jvyyzpthtna^pbz ] )
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slow sql server DB reads
I run a python website on a IIS server. I replaced my flat file DB with SQL server, but the reads are very slow. 7 seconds for 3 querrys like these conn= adodbapi.connect( Provider=SQLOLEDB.1;Persist Security Info=False;User ID=sa;Password=xxx;Initial Catalog=dlpl;Data Source=(local) ) crsr = conn.cursor() sql = select SessionKey, SessionValue from ASPSessionState where GUID='%s' % self.id crsr.execute(sql) while 1: info = crsr.fetchone() if not info: break strKey = str(info[0]) Opening the database is already good for 2 seconds. Anyone know how to speed it up? -- http://mail.python.org/mailman/listinfo/python-list
Re: What are OOP's Jargons and Complexities?
Xah Lee wrote: As part of this new syntax and purity, where everything in a program is of Classes and Objects and Methods, many complex issues and concept have arisen in OOP. Yes and it is easy to communicate a class which represents some thing determined by object oriented analysis and can be graphed as an element of an UML diagram in your development team. This is simply the state of the art in the IT industry and if FP-people or followers of any other alternative programming style can communicate their concepts and design patterns via type-classes or parentheses as well or better than they will going to lead the dicourse and OO will fall apart. I'm just sceptical that this is going to happen. Kay -- http://mail.python.org/mailman/listinfo/python-list
ClientForm question
Hi, I need some help on using ClientForm to post to cgi and getting response. I have done this many times and it worked very well until now. I have contacted the webmaster of the page I'm interested in an this is the response I got: Indeed, a simple wget does _not_ do the trick for our servers. You must start by doing a POST (e.g. not a GET) with the form data. From what i can guess about the python code it seems to be doing the post correctly. The response page to that form is a very short page that reloads another page (using javascript). This page will eventually contain the resulting webpage. You should try reloading it until it no longer tells you that your job is queued or processing. Use a nice poll timeout, say 10 every seconds. If the job takes a long time (or the queue is full) the page will take a few seconds to load. This is intentional, as the cgi-script in this period automatically polls the status of the job, and issues a javascript re-load if it finishes within the time of the page-load (now showing the result). Hope this helps The post I do returnes and error from the python code saying there is no form field called xxx but actually it exists in the form. Any help is appreciated, thanks for your time... -- http://mail.python.org/mailman/listinfo/python-list
Python DOM
Hi ! I need to create a XML document using DOM. How do I set the element value, after creating it with 'createElement' ? Documentation states that there is a 'read-only' 'nodeValue' variable. I don't know what means 'read-only variable' in Python, but the fact is that setting that variable does not help. Java DOM API has 'setNodeValue' method. Is there anything corresponding in Python DOM ? DG -- http://mail.python.org/mailman/listinfo/python-list
Re: What are OOP's Jargons and Complexities?
Xah Lee wrote:
So, a simple code like this in normal languages:
a = a string;
b = another one;
c = join(a,b);
print c;
or in lisp style
(set a a string)
(set b another one)
(set c (join a b))
(print c)
becomes in pure OOP languages:
public class test {
public static void main(String[] args) {
String a = new String(a string);
String b = new String(another one);
StringBuffer c = new StringBuffer(40);
c.append(a); c.append(b);
System.out.println(c.toString());
}
}
The actual Java parallel to what you have written above is:
String a = a string;
String b = another one;
String c = a + b;
System.out.println (c);
In the same way, numbers in Java have become a formalization of many
classes: Double, Float, Integer, Long... and each has a bunch of
methods to operate or convert from one to the other.
Byte, Short, Integer, Long, Char, Float and Double are wrapper classes,
which exist chiefly to allow primitive content to be stored in
collection classes.
byte, short, int, long, char, float, and double are primitives.
Instead of
aNumber = 3;
print aNumber^3;
In Java the programer needs to master the ins and outs of the several
number classes, and decide which one to use. (and if a program later
needs to change from one type of number to another, it is often
cumbersome.)
This has nothing to do with object orientation or classes, but with
strong typing, which is important for program verification, and an
inescapable necessity for compiling to efficient object code. Strong
typing has been a feature of mainstream programming languages since the
late 1950's.
--
John W. Kennedy
The bright critics assembled in this volume will doubtless show, in
their sophisticated and ingenious new ways, that, just as /Pooh/ is
suffused with humanism, our humanism itself, at this late date, has
become full of /Pooh./
-- Frederick Crews. Postmodern Pooh, Preface
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