Re: COM and Threads
Roger Upole wrote: Teja [EMAIL PROTECTED] wrote: Roger Upole wrote: Teja [EMAIL PROTECTED] wrote: I have an application which uses COM 's Dispatch to create a COM based object. Now I need to upgrade the application to a threaded one. But its giving an error that COM and threads wont go together. Specifically its an attribute error at the point where COM object is invoked. Any pointers please?? An actual traceback would help. At a guess, when using COM in a thread you need to call pythoncom.CoInitialize and CoUninitialize yourself. Roger Actually Roger, this is the scenario I create a COM object at the beginnning of the main thread. In the sub thread, I need to access the same instance of the COM object. If it were a normal object ie. not a COM obj, i was able to do it. But if it were a COM object, its giving an attribute error? Should I pass a COM object to the thread. If so How? Please let me know ASAP... Thnks To pass COM objects between threads, usually they'll need to be marshaled using pythoncom.CoMarshalInterThreadInterfaceInStream, and unmarshaled with pythoncom.CoGetInterfaceAndReleaseStream. Roger I really appreciate your quick replyCan u please let me know how to do marshalling and unmarshalling or any good refrences to do it. Because i tried to do it. I got some errors ans so I left it... Thnks again... -- http://mail.python.org/mailman/listinfo/python-list
always raise syntax error!
I'm not quite new to this language, but such error has never happened so frequently before. I have no idea what to do about it, because there's actually no syntax error at all !! I'm using python 2.4.3 on windows, with gvim.. I realize this might because of the tab and space, so I use listchars in vim to all my tabs and trailing spaces visible, make sure they are used consistently, but python still raise syntax error, no further description, and just make no sense to me. anyone heard of such issue or the like before? many thanks daniel -- http://mail.python.org/mailman/listinfo/python-list
Re: Starting out.
Richard Jones wrote: Tim Chase wrote: typed with just the top-row of keys '^[qwertyuiop]*$' The longest being typewriter :) Maybe you should say amongst the longest pepperwort perpetuity perruquier pirouetter proprietor repertoire typewriter But even that would be wrong. rupturewort hey, look, it's Friday -- http://mail.python.org/mailman/listinfo/python-list
Re: always raise syntax error!
On Thu, 12 Oct 2006 23:25:58 -0700, daniel wrote:
I'm not quite new to this language, but such error has never happened
so frequently before. I have no idea what to do about it, because
there's actually no syntax error at all !!
Looking into my crystal ball, I see that you are correct, there is no
syntax error -- because there is no code! There might not even be a
computer. It is all an illusion brought on by lack of fresh air.
Or maybe not -- my crystal ball is notoriously unreliable.
How about you post the FULL traceback of the error, so we can see for
ourselves if there is a syntax error or not?
e.g.
x{4} = 5
File stdin, line 1
x{4} = 5
^
SyntaxError: invalid syntax
--
Steven
--
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How to print the CDATA of .xml file?
Hi, Recently ,I just turn to Python from C#.However ,as a dynamic language . Python and C# was so different. Now ,I want to get some record from an XML file,The format of the XML file as follow: ... Doc rID=T1 DName![CDATA[Release Truck]]/DName Res![CDATA[Res18]]/Res DT rID=T2 NodeArgs eType=Table icon=2 nRep=5 filter=False Disp![CDATA[Run-Time Data]]/Disp BtmPane vType=Table Path![CDATA[Default.xls]]/Path /BtmPane /NodeArgs /DT NodeArgs eType=StartTest icon=1 nRep=4 status=Failed Disp![CDATA[Test Release Truck Summary]]/Disp /NodeArgs /Doc when iuse the minidom to parase the XML file,it would ignored the section of ![CDATA[...] the code is: _document=minidom.parse(filePath) _documnetList=_document.getElementsByTagName(NodeArgs) for _argNode in _documnetList: print _argNode.nodeValue,_argNode.localName when it run. The nodeValue of the CDATA Sectionis always None,Is my code error? and how should i do when i want to get the value of the in the CDATA section? -- http://mail.python.org/mailman/listinfo/python-list
Re: Standard Forth versus Python: a case study
Gabriel Genellina wrote:
At Thursday 12/10/2006 17:44, [EMAIL PROTECTED] wrote:
fun median {
var x = 0.
while( *p++) {
if( (*p) x) x = *p.
}
return x.
}
clearly, i've forgotten the definition of the median of a list.
to that i plead faulty memory.
That explains all. Finding the median in an efficient way (that is,
without sorting the data first) isn't trivial, so your claim of I can
do that using only one temp variable was a bit surprising...
BTW, the median is the value which sits just in the middle of the list
when ordered: median(3,5,12,1,2)=median(1,2,3,5,12) = 3
note that both his proposals does indeed find the median if given a list
of zeros, though. maybe they just used lousy sample data in that stat
class he took?
/F
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OT: What's up with the starship?
I cannot connect to starship.python.net: neither http, nor can I login interactively with ssl (and the host key seems to have changed as well). Does anyone know more? Thanks, Thomas -- http://mail.python.org/mailman/listinfo/python-list
Re: COM and Threads
Teja [EMAIL PROTECTED] wrote:
Roger Upole wrote:
Teja [EMAIL PROTECTED] wrote:
Roger Upole wrote:
Teja [EMAIL PROTECTED] wrote:
I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together. Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??
An actual traceback would help.
At a guess, when using COM in a thread
you need to call pythoncom.CoInitialize and
CoUninitialize yourself.
Roger
Actually Roger, this is the scenario
I create a COM object at the beginnning of the main thread. In the sub
thread, I need to access the same instance of the COM object. If it
were a normal object ie. not a COM obj, i was able to do it. But if it
were a COM object, its giving an attribute error? Should I pass a COM
object to the thread. If so How? Please let me know ASAP... Thnks
To pass COM objects between threads, usually they'll need to be marshaled
using pythoncom.CoMarshalInterThreadInterfaceInStream, and unmarshaled
with pythoncom.CoGetInterfaceAndReleaseStream.
Roger
I really appreciate your quick replyCan u please let me know how to
do marshalling and unmarshalling or any good refrences to do it.
Because i tried to do it. I got some errors ans so I left it...
Thnks again...
Here's a simple example using Internet Explorer.
import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1
def nav(istream, dest):
pythoncom.CoInitialize()
d=pythoncom.CoGetInterfaceAndReleaseStream(istream, pythoncom.IID_IDispatch)
my_ie=win32com.client.Dispatch(d)
my_ie.Navigate(dest)
pythoncom.CoUninitialize()
s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
thread.start_new_thread(nav, (s, 'www.google.com'))
Roger
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Python Best Practice References
Can anybody suggest any references (links, books, etc)about this? I'm thinking of something similar with D.Conway's Perl Best Practice. -- Edward WIJAYA SINGAPORE Institute For Infocomm Research - Disclaimer - This email is confidential and may be privileged. If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you. -- http://mail.python.org/mailman/listinfo/python-list
File read-write mode: problem appending after reading
Hi all,
Working with read and write operations on a file I stumbled on a
complication when writes fail following a read to the end.
f = file ('T:/z', 'r+b')
f.write ('abcdefg')
f.tell ()
30L
f.seek (0)
f.read ()
'abcdefg'
f.flush () # Calling or not makes no difference
f.write ('abcdefg')
Traceback (most recent call last):
File pyshell#62, line 1, in -toplevel-
f.write ('abcdefg')
IOError: (0, 'Error')
Flushing doesn't help. I found two work arounds:
f.read ()
'abcdefg'
f.read () # Workaround 1: A second read (returning an empty string)
''
f.write ('abcdefg')
(No error)
f.read ()
'abcdefg'
f.seek (f.tell ()) # Workaround 2: Setting the cursor (to where
it is!)
f.write ('abcdefg')
(No error)
I found no problem with writing into the file. So it looks like it has
to do with the cursor which a read puts past the end, unless it is past
the end, in which case it goes back to the end. Is there a less kludgy
alternative to fseek (ftell ())?
Frederic
--
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Re: Pickling an instance of a class containing a dict doesn't work
Peter Otten wrote: Chances are you have inadvertently created an /instance/ attribute build_steps which was then saved: s = subproject() # ... s.configuration[name] = my dinner # modifies the class attribute s.build_steps = [hunt, kill, cook] # creates an instance attribute Yes, now I see. That's the way I filled the dict and the list. Thank you for the explanation :) Marco -- http://mail.python.org/mailman/listinfo/python-list
Re: Wing IDE 2.1.3 released
Wingware Announce [EMAIL PROTECTED] wrote: 8--- * Professional quality code editor * Visual Studio, VI/Vim, Emacs, and Brief key bindings Can I copy paste columns as in Brief? Do the Brief Macros work? 100% ? - Hendrik -- http://mail.python.org/mailman/listinfo/python-list
Efficiently iterating over part of a list
If I want to iterate over part of the list, the normal Python idiom is to do something like this: alist = range(50) # first item is special x = alist[0] # iterate over the rest of the list for item in alist[1:] x = item The important thing to notice is that alist[1:] makes a copy. What if the list has millions of items and duplicating it is expensive? What do people do in that case? Are there better or more Pythonic alternatives to this obvious C-like idiom? for i in range(1, len(alist)): x = alist[i] -- Steven D'Aprano -- http://mail.python.org/mailman/listinfo/python-list
Re: COM and Threads
Roger Upole wrote:
Teja [EMAIL PROTECTED] wrote:
Roger Upole wrote:
Teja [EMAIL PROTECTED] wrote:
Roger Upole wrote:
Teja [EMAIL PROTECTED] wrote:
I have an application which uses COM 's Dispatch to create a COM based
object. Now I need to upgrade the application to a threaded one. But
its giving an error that COM and threads wont go together.
Specifically
its an attribute error at the point where COM object is invoked. Any
pointers please??
An actual traceback would help.
At a guess, when using COM in a thread
you need to call pythoncom.CoInitialize and
CoUninitialize yourself.
Roger
Actually Roger, this is the scenario
I create a COM object at the beginnning of the main thread. In the sub
thread, I need to access the same instance of the COM object. If it
were a normal object ie. not a COM obj, i was able to do it. But if it
were a COM object, its giving an attribute error? Should I pass a COM
object to the thread. If so How? Please let me know ASAP... Thnks
To pass COM objects between threads, usually they'll need to be marshaled
using pythoncom.CoMarshalInterThreadInterfaceInStream, and unmarshaled
with pythoncom.CoGetInterfaceAndReleaseStream.
Roger
I really appreciate your quick replyCan u please let me know how to
do marshalling and unmarshalling or any good refrences to do it.
Because i tried to do it. I got some errors ans so I left it...
Thnks again...
Here's a simple example using Internet Explorer.
import win32com.client, pythoncom, thread
ie=win32com.client.Dispatch('internetexplorer.application')
ie.Visible=1
def nav(istream, dest):
pythoncom.CoInitialize()
d=pythoncom.CoGetInterfaceAndReleaseStream(istream,
pythoncom.IID_IDispatch)
my_ie=win32com.client.Dispatch(d)
my_ie.Navigate(dest)
pythoncom.CoUninitialize()
s=pythoncom.CoMarshalInterThreadInterfaceInStream(pythoncom.IID_IDispatch,ie)
thread.start_new_thread(nav, (s, 'www.google.com'))
Roger
Thnks a lot Roger, Its working gr8..Now, once the thread is started
with start_new_thread, is there any way to terminate it upon user's
request. I have explored and found out that there is no thread.kill().
So wht to do now?
Teja
--
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A question about call Wincvs
Hi, In the Wincvs,if want to get commitable file list in local file list,it could click flat mode-show commitable But ,if i want to through command line ,how show it do? Is there any CVS lib? Thanks. Kevin Lee -- http://mail.python.org/mailman/listinfo/python-list
Re: Efficiently iterating over part of a list
Steven D'Aprano wrote: If I want to iterate over part of the list, the normal Python idiom is to do something like this: alist = range(50) # first item is special x = alist[0] # iterate over the rest of the list for item in alist[1:] x = item The important thing to notice is that alist[1:] makes a copy. What if the list has millions of items and duplicating it is expensive? What do people do in that case? Are there better or more Pythonic alternatives to this obvious C-like idiom? for i in range(1, len(alist)): x = alist[i] I think this is a job for iterators: listiter = iter(alist) first_item_is_special = listiter.next() for not_special_item in listiter: do_stuff_with(not_special_item) Other solutions might involve enumerators: special = [i for i in xrange(50) if not i%13] for i,item in alist: if i in special: do_something_special_with(item) else: do_other_stuff_with(item) James James -- http://mail.python.org/mailman/listinfo/python-list
Re: Efficiently iterating over part of a list
James Stroud wrote: Steven D'Aprano wrote: If I want to iterate over part of the list, the normal Python idiom is to do something like this: alist = range(50) # first item is special x = alist[0] # iterate over the rest of the list for item in alist[1:] x = item The important thing to notice is that alist[1:] makes a copy. What if the list has millions of items and duplicating it is expensive? What do people do in that case? Are there better or more Pythonic alternatives to this obvious C-like idiom? for i in range(1, len(alist)): x = alist[i] I think this is a job for iterators: listiter = iter(alist) first_item_is_special = listiter.next() for not_special_item in listiter: do_stuff_with(not_special_item) Other solutions might involve enumerators: special = [i for i in xrange(50) if not i%13] for i,item in alist: if i in special: do_something_special_with(item) else: do_other_stuff_with(item) James James I mean for i,item in enumerate(alist): -- http://mail.python.org/mailman/listinfo/python-list
Re: File read-write mode: problem appending after reading
[Frederic Rentsch]
Working with read and write operations on a file I stumbled on a
complication when writes fail following a read to the end.
f = file ('T:/z', 'r+b')
f.write ('abcdefg')
f.tell ()
30L
f.seek (0)
f.read ()
'abcdefg'
f.flush () # Calling or not makes no difference
f.write ('abcdefg')
Nothing is defined about what happens at this point, and this is
inherited from C. In standard C, if you want to read following a
write, or write following a read, on the same stream, you must perform
a file-positioning operation (typically a seek) between them.
Traceback (most recent call last):
File pyshell#62, line 1, in -toplevel-
f.write ('abcdefg')
IOError: (0, 'Error')
That's one possible result. Since nothing is defined, any other
outcome is also a possible result ;-)
Flushing doesn't help.
Right, and because flush() is not a file-positioning operation.
I found two work arounds:
f.read ()
'abcdefg'
f.read () # Workaround 1: A second read (returning an empty string)
''
f.write ('abcdefg')
(No error)
Purely an accident; may or may not work the next time you try it, or
on another platform; etc.
f.read ()
'abcdefg'
f.seek (f.tell ()) # Workaround 2: Setting the cursor (to where it is!)
That's a correct approach. f.seek(0, 1) (seek 0 bytes from the
current position) is a little easier to spell.
f.write ('abcdefg')
(No error)
I found no problem with writing into the file. So it looks like it has
to do with the cursor which a read puts past the end, unless it is past
the end, in which case it goes back to the end. Is there a less kludgy
alternative to fseek (ftell ())?
As above, you need to seek when switching from reading to writing, or
from writing to reading.
--
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Re: Efficiently iterating over part of a list
Steven D'Aprano wrote: [snip] The important thing to notice is that alist[1:] makes a copy. What if the list has millions of items and duplicating it is expensive? What do people do in that case? Are there better or more Pythonic alternatives to this obvious C-like idiom? for i in range(1, len(alist)): x = alist[i] for x in itertools.islice(alist, 1, len(alist)): HTH Ziga -- http://mail.python.org/mailman/listinfo/python-list
Re: Efficiently iterating over part of a list
Steven D'Aprano wrote: Are there better or more Pythonic alternatives to this obvious C-like idiom? for i in range(1, len(alist)): x = alist[i] For small start values you can use itertools.islice(), e. g: for x in islice(alist, 1, None): # use x You'd have to time at what point the C-like idiom (which I would have no qualms using throughout) becomes faster. Peter -- http://mail.python.org/mailman/listinfo/python-list
Freeware link/html checker (validator) for mod_python site
Hi ! Sorry for non-pythonic subject, but if I not find good solution, I will write a routine for this in python... :-))) My mod_py site is growing quickly. It have many pages, many of them are dynamic. I want to check the links, and if possible, validate the html. I search freeware tools in the net, but I found only HTML Link Validator that meet the requirements. This utility can check the whole site, and it handle the circular references - but it's not free, and it not check the whole site... :-( Some other utilites can check one URL (CSE HTML validator lite, html kit, Firefox check page links, Firefox validate HTML, Firefox webdeveloper extension), but not entire site... Do you knows about a good local site checker application that can do validation/link checking in one ? Is anybody have an experience in this theme ? Important thing: the OS is Windows XP. Thanks for your help: dd -- http://mail.python.org/mailman/listinfo/python-list
Using SVN with Python and .pyc files
Hello All, I have been moving to managing a lot of my code with SVN and I have found it to work extremely well. However, I'm not exactly sure how to deal with all of the .pyc files that get created every time I test a project or package. How do people manage this? Do you run a script to find files with the .pyc extension and delete those before every commit, or is there a more elegant way? It seems like a lot of wasted bandwidth an memory on the server side to constantly be dealing with these files that contain no real information. James -- http://mail.python.org/mailman/listinfo/python-list
Re: pygtk dynamic table
On 2006-10-12, JyotiC [EMAIL PROTECTED] wrote: hi, i am making a gui, which looks like excel sheets. i want to give the user the facility of adding rows/columns at the run time. there is some initial size, but that can be increased any time during the executation of the code. what i have tried, is that i am using table. so when ever user increase the size, i destroy the original table and make a new one with the increased size. is there a better way to do this ? What about the resize method? http://www.pygtk.org//docs/pygtk/class-gtktable.html#method-gtktable--resize -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: always raise syntax error!
thank you so much for the reply. I finally re-type all the codes where python would raise syntax error, then fixed. I did not examine every single word of my old codes though, there might be some parenthesis not matching somewhere, I guess. well, I would say, the reason why I could not position the error code may partly due to the ambiguous message that python provides. the lines that python pointed to contains no error, I think the error codes must be too far away from there. anyway, I hope python would make more detailed error messages, like c++ compilers do. such as: missing ; or ( not matching...etc. tks again.. daniel -- http://mail.python.org/mailman/listinfo/python-list
Re: Using SVN with Python and .pyc files
James Stroud schreef: I have been moving to managing a lot of my code with SVN and I have found it to work extremely well. However, I'm not exactly sure how to deal with all of the .pyc files that get created every time I test a project or package. How do people manage this? Do you run a script to find files with the .pyc extension and delete those before every commit, or is there a more elegant way? It seems like a lot of wasted bandwidth an memory on the server side to constantly be dealing with these files that contain no real information. You can instruct SVN to ignore the *.pyc files. What you need to do that is the svn:ignore property on the directory containing the files, IIRC. Check the docs for details. The online book at http://svnbook.red-bean.com/ should tell you all you need. Look especially at http://svnbook.red-bean.com/nightly/en/svn.advanced.props.html#svn.advanced.props.special.ignore -- If I have been able to see further, it was only because I stood on the shoulders of giants. -- Isaac Newton Roel Schroeven -- http://mail.python.org/mailman/listinfo/python-list
Re: Using SVN with Python and .pyc files
James Stroud [EMAIL PROTECTED] wrote: I have been moving to managing a lot of my code with SVN and I have found it to work extremely well. However, I'm not exactly sure how to deal with all of the .pyc files that get created every time I test a project or package. How do people manage this? Do you run a script to find files with the .pyc extension and delete those before every commit, or is there a more elegant way? It seems like a lot of wasted bandwidth an memory on the server side to constantly be dealing with these files that contain no real information. You use svn:ignore to ignore files you don't want version controlled. See: http://svnbook.red-bean.com/nightly/en/svn.advanced.props.html#svn.advanced.props.special.ignore -- http://mail.python.org/mailman/listinfo/python-list
Re: Freeware link/html checker (validator) for mod_python site
durumdara [EMAIL PROTECTED] wrote: Sorry for non-pythonic subject, but if I not find good solution, I will write a routine for this in python... :-))) in your Python installation (or source) directory, do $ cd Tools/webchecker and then write $ python webchecker.py -x http://yoursite (use --help to get a man page) /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Sending binary pickled data through TCP
Paul Rubin http wrote:
As for the network representation, DJB proposes this format:
http://cr.yp.to/proto/netstrings.txt
Netstrings are cool and you'll find some python implementations if you
search.
But it is basically number:string,, ie 12:hello world!,
Or you could use escaping which is what I usually do. This has the
advantage that you don't need to know how long the data is in advance.
Eg, these are from a scheme which uses \t to seperate arguments and
\r or \n to seperate transactions. These are then escaped in the
actual data using these functions
def escape(s):
This escapes the string passed in, changing CR, LF, TAB and \\ into
\\r, \\n, \\t and
s = s.replace(\\, )
s = s.replace(\r, \\r)
s = s.replace(\n, \\n)
s = s.replace(\t, \\t)
return s
def unescape(s, _unescape_mapping = string.maketrans('tnr','\t\n\r'),
_unescape_re = re.compile(r'\\([(rnt\\)])')):
This unescapes the string passed in, changing \\r, \\n, \\t and
\\any_char into
CR, LF, TAB and any_char
def _translate(m):
return m.group(1).translate(_unescape_mapping)
return _unescape_re.sub(_translate, s)
(These functions have been through the optimisation mill which is why
they may not look immediately like how you might first think of
writing them!)
--
Nick Craig-Wood [EMAIL PROTECTED] -- http://www.craig-wood.com/nick
--
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Re: Using SVN with Python and .pyc files
James Stroud schrieb: project or package. How do people manage this? Do you run a script to find files with the .pyc extension and delete those before every commit, or is there a more elegant way? It seems like a lot of wasted bandwidth an memory on the server side to constantly be dealing with these files that contain no real information. in /etc/subversion/config global-ignores = *.pyc *~ #*# -- Servus, Gregor -- http://mail.python.org/mailman/listinfo/python-list
Re: Python component model
Peter Maas wrote:
Bruno Desthuilliers wrote:
Peter Maas wrote:
[...]
a reference implementation for web programming as part of the standard
library,
wsgiref is part of the 2.5 stdlib.
Yes, but it's not an implementation. Think of something like Tomcat for
the Java Servlet Specification.
Then I'd vote for paste.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
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Re: Efficiently iterating over part of a list
Steven D'Aprano [EMAIL PROTECTED] wrote: The important thing to notice is that alist[1:] makes a copy. What if the list has millions of items and duplicating it is expensive? What do people do in that case? I think you are worrying prematurely. On my system slicing one element off the front of a 10,000,000 element list takes 440mS. The same operation on 1,000,000 elements taks 41mS. Iterating through the sliced list: for x in r[1:]: y = x+1 takes 1.8s and 157mS respectively, so the slicing is only a quarter of the time for even this minimal loop. As soon as you do anything much inside the loop you can forget the slice cost. Remember that copying the list never copies the elements in the list, it just copies pointers and bumps ref counts. Copying a list even if it has millions of items is not usually expensive compared with the costs of manipulating all the items in the list. So the first thing you do is not to worry about this until you know it is an issue. Once you know for a fact that it is a problem, then you can look at optimising it with fancy lazy slicing techniques, but not before. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python component model
Fredrik Lundh wrote:
Paul Boddie wrote:
Meanwhile, the Web programming standardisation scene remains
stagnant.
Aw, come on. The Python web programming standardisation wars are over, for
now.
There's Django, and there's TurboGears,
And there's Pylons...
and there's Zope 2/3, all with slightly different
approaches, and slightly different target audiences. Unless you're doing
really odd things,
one of these will be more than good enough for your application.
(as for WSGI, it's plumbing. You can of course build fun things from spare
parts and
plumbing, and there are really interesting things going on in certain
research labs, as usual,
but if you want turn-key stuff, pick one of the big three.)
/F
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
--
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Re: Python component model
Bruno Desthuilliers wrote: Meanwhile, the Web programming standardisation scene remains stagnant. Aw, come on. The Python web programming standardisation wars are over, for now. There's Django, and there's TurboGears, And there's Pylons... and a zillion other more or less interesting research projects. I don't see any traces of the kind of ecosystems and market awareness that exist for Zope, Django, and TurboGears (or for that matter, Rails and Mason), for any other Python web pro- gramming tool. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Using SVN with Python and .pyc files
Everyone wrote: [something helpful] Thank you to everyone for your responses. James -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Best Practice References
Wijaya Edward wrote: Can anybody suggest any references (links, books, etc)about this? I'm thinking of something similar with D.Conway's Perl Best Practice. -- Edward WIJAYA SINGAPORE Institute For Infocomm Research - Disclaimer - This email is confidential and may be privileged. If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you. By all means, please start here: http://www.python.org/doc/essays/styleguide.html James -- http://mail.python.org/mailman/listinfo/python-list
Re: Click and Drag Functionality in Web Apps with Python
Wijaya Edward schrieb: Hi, Some recent webapps like Kiko http://www.kiko.com/ , Google's gadget http://www.google.com/ig/directory?hl=en , and spreadsheets http://spreadsheets.google.com to name a few, have this functionality. I wonder how can this funcitonalities be implemented in Python. Do you guys have any experience with it? Any Python module that support that? There is mochikit, a javascript library that makes coding in javascript suck less. And there is the pypy javascript backend. But real python - no. diez -- http://mail.python.org/mailman/listinfo/python-list
Re: How to print the CDATA of .xml file?
Kevien Lee wrote: when i use the minidom to parase the XML file,it would ignored the section of ![CDATA[...] the code is: _document=minidom.parse(filePath) _documnetList=_document.getElementsByTagName(NodeArgs) for _argNode in _documnetList: print _argNode.nodeValue,_argNode.localName when it run. The nodeValue of the CDATA Section is always None,Is my code error? here's one way to do it, under Python 2.5: import xml.etree.ElementTree as ET tree = ET.parse(filename) for elem in tree.findall(.//NodeArgs): print elem.findtext(Disp) print elem.findtext(BtmPane/Path) /F -- http://mail.python.org/mailman/listinfo/python-list
Re: 3D Vector Type Line-Drawing Program
Hi, I am not sure, if that is, what your looking for, but with 'salome' you able to produce 3D drawings with an GUI or using a python script. Take a look at: http://www.salome-platform.org/home/presentation/geom/ * Scott David Daniels [EMAIL PROTECTED] wrote: Ron Adam wrote: Scott David Daniels wrote: Ron Adam wrote: ... Is there a way to have the display show a wire frame image instead of shaded shapes? You can draw the edges as lines. Is there a setting for this?, or are you suggesting reading the coordinates and creating curve objects for the edges? Nope, you'd have to make a poly line which was the wire frame, but it would then rotate and such with the rest of the model. Essentially you would, for each primitive, have a wire-frame and a volumetric version, and keep one of the two visible (with the other invisible) at all times. Is there an easy way to convert a display to something that can be printed? You can generate POV-ray source. This is not a system for creating beautiful pictures, but rather a great 3-D sketch pad. Now POV-ray _will_ create beautiful pictures, but the texturing, shading, and lighting control that POV-ray gives you exceeds that of VPython. You could use VPython to get you model built and view- point placed, and the tweak the POV-ray code to get pretty output. --Scott David Daniels [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list Greetings! Fabian -- http://mail.python.org/mailman/listinfo/python-list
Re: Click and Drag Functionality in Web Apps with Python
Diez B. Roggisch wrote: There is mochikit, a javascript library that makes coding in javascript suck less. and which is written by an experienced Python programmer, so it also makes your JavaScript look and feel a little more Pythonic. (not that JavaScript itself is that unpythonic, really, but some of the API:s suck pretty badly). /F -- http://mail.python.org/mailman/listinfo/python-list
Re: What value should be passed to make a function use the default argument value?
On 2006-10-12, Magnus Lycka [EMAIL PROTECTED] wrote: Antoon Pardon wrote: Well maybe he didn't intend that, but how is the reader of the documentation to know that? The reader can only go by how things are documented. If those are not entirely consistent with the intend of the programmer, that is not the readers fault. I don't think I ever assumed that it was right to call functions with keyword arguments if they weren't defined with keyword parameters, I'm not sure I follow here. AFAICS, you can't define keyword parameters. You can give default values to parameters but this is orthogonal to calling a function with keywords. If we somehow want to seperate parameters in those that can be used with a keyword and those that don't it has to be something different than providing a default value to that parameter. -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: Adding Worksheets to an Excel Workbook
Hi Wesley,
* wesley chun [EMAIL PROTECTED] wrote:
just a small OT question coming from a linux openoffice
system...
Does there exist something similar for powerpoint? Would be
nice, if anybody can direct me to more examples...
fabian,
see below for a PP example. you mentioned you were coming from a
linux OOo system... are you trying to do COM stuff with OOo? i'm not
familiar with it, but since they do support
some level of VB-like scripting, i don't believe it's out of the question.
one thing that i did forget to mention in my earlier message is that i
use static dispatch for these apps. if you did not go and run the
makepy utility, you would have to use dynamic dispatch, start your
apps with win32com.client.Dispatch(), or, using the same import
statement as below, win32.Dispatch().
anyway, here is pretty much the same script as i sent earlier but for
PowerPoint instead of Excel (the book has small examples for each of
Excel, Word, PowerPoint, and Outlook):
# based on ppoint.pyw in Core Python Programming, 2nd ed
from time import sleep
import win32com.client as win32
def ppoint():
ppoint = win32.gencache.EnsureDispatch('PowerPoint.Application')
pres = ppoint.Presentations.Add()
ppoint.Visible = True
s1 = pres.Slides.Add(1, win32.constants.ppLayoutText)
sleep(1)
s1a = s1.Shapes[0].TextFrame.TextRange
s1a.Text = 'Python-to-PowerPoint Demo'
sleep(1)
s1b = s1.Shapes[1].TextFrame.TextRange
for i in range(3, 8):
s1b.InsertAfter(Line %d\r\n % i)
sleep(1)
s1b.InsertAfter(\r\nTh-th-th-that's all folks!)
sleep(5)
pres.Close()
ppoint.Quit()
if __name__=='__main__':
ppoint()
Thanks! I am not able to try it out yet, but as soon as I
get access to my windows machine, I'll give it a try.
Greetings!
Fabian
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Re: SOAPpy and callback
[EMAIL PROTECTED] schrieb: Hello, I'm trying to find how to use a callback in a SOAP client using SOAPpy. Does SOAPpy have to manage it, or does Python include some API to do it? I've never seen any callback mentioned in SOAP. Are you sure this is possible with any SOAP implementation, at least standard-wise? Diez -- http://mail.python.org/mailman/listinfo/python-list
Big speed boost in os.walk in Python 2.5
Hi,
I noticed a big speed improvement in some of my script that use os.walk
and I write a small script to check it:
import os
for path, dirs, files in os.walk('D:\\FILES\\'):
pass
Results on Windows XP after some run to fill the disk cache (with
~59000 files and ~3500 folders):
Python 2.4.3 : 45s
Python 2.5 : 10s
Very nice, but somewhat strange...
Is Python 2.4.3 os.walk buggy ???
Is this results only valid in Windows or *nix system show the same
difference ?
The profiler show that most of time is spend in ntpath.isdir and this
function is *a lot* faster in Python 2.5.
Maybe this improvement could be backported in Python 2.4 branch for the
next release ?
Python 2.4.3
604295 function calls (587634 primitive calls) in 48.629 CPU
seconds
Ordered by: standard name
ncalls tottime percall cumtime percall filename:lineno(function)
625540.2640.0000.2640.000 :0(append)
10.0010.001 48.593 48.593 :0(execfile)
660740.1970.0000.1970.000 :0(len)
35215.2190.0015.2190.001 :0(listdir)
10.0360.0360.0360.036 :0(setprofile)
62554 38.8120.001 38.8120.001 :0(stat)
10.0000.000 48.593 48.593 string:1(?)
660740.2180.0000.2180.000 ntpath.py:116(splitdrive)
35200.0090.0000.0090.000 ntpath.py:246(islink)
625540.7670.000 40.1370.001 ntpath.py:268(isdir)
660740.4330.0000.6500.000 ntpath.py:51(isabs)
660740.8800.0001.7260.000 ntpath.py:59(join)
20183/35221.2170.000 48.5730.014 os.py:211(walk)
10.0000.000 48.629 48.629
profile:0(execfile('test.py'))
00.000 0.000 profile:0(profiler)
625540.1740.0000.1740.000 stat.py:29(S_IFMT)
625540.3850.0000.5590.000 stat.py:45(S_ISDIR)
10.0190.019 48.592 48.592 test.py:1(?)
Python 2.5:
604295 function calls (587634 primitive calls) in 17.386 CPU
seconds
Ordered by: standard name
ncalls tottime percall cumtime percall filename:lineno(function)
625540.2470.0000.2470.000 :0(append)
10.0010.001 17.315 17.315 :0(execfile)
660740.1680.0000.1680.000 :0(len)
35215.2870.0025.2870.002 :0(listdir)
10.0710.0710.0710.071 :0(setprofile)
625547.8120.0007.8120.000 :0(stat)
10.0000.000 17.315 17.315 string:1(module)
660740.1860.0000.1860.000 ntpath.py:116(splitdrive)
35200.0090.0000.0090.000 ntpath.py:245(islink)
625540.7120.0009.0130.000 ntpath.py:267(isdir)
660740.3940.0000.5810.000 ntpath.py:51(isabs)
660740.8150.0001.5640.000 ntpath.py:59(join)
20183/35221.1760.000 17.2960.005 os.py:218(walk)
10.0000.000 17.386 17.386
profile:0(execfile('test.py'))
00.000 0.000 profile:0(profiler)
625540.1590.0000.1590.000 stat.py:29(S_IFMT)
625540.3310.0000.4890.000 stat.py:45(S_ISDIR)
10.0180.018 17.314 17.314 test.py:1(module)
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Re: operator overloading + - / * = etc...
Fredrik Lundh [EMAIL PROTECTED] (FL) wrote: FL Piet van Oostrum wrote: The official Python documentation (language reference manual) talks a lot about variables. So it seems silly to say that Python doesn't have variables. FL the language reference mostly uses the term variables when discussing FL local variables and instance variables, and is (usually) careful to talk FL about names when talking about binding behaviour. Mostly yes, but not exclusively. E.g. If a name is bound in a block, it is a local variable of that block. If a name is bound at the module level, it is a global variable. (The variables of the module code block are local and global.) If a variable is used in a code block but not defined there, it is a free variable. There are also other uses of variable for things at the module level. And the word `variable(s)' occurs 80 times in the language reference manual. FL for example, the description of the assignment statement: FL http://www.python.org/doc/2.4.3/ref/assignment.html FL only uses variable twice, in a note that discussing a given code FL example. the more formal parts of that page consistently use the term FL name. FL it's often a good idea to be a bit careful when discussing detailed FL behaviour, especially in contexts where the audience may associate FL variables with small areas of memory. It is interesting that the word 'variable' is nowhere defined in the manual. What one imagines with the word `variable' depends on one's programming background, I guess, and that could certainly give a wrong impression. -- Piet van Oostrum [EMAIL PROTECTED] URL: http://www.cs.uu.nl/~piet [PGP 8DAE142BE17999C4] Private email: [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Thread termination
Hi all, Does any one know how to terminate or kill a thread that is started with start_new_thread() in the middle of its execution? Any pointers? Thanks in advance Teja. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to print the CDATA of .xml file?
-- Forwarded message --From:Fredrik Lundh [EMAIL PROTECTED]To:python-list@python.org Date:Fri, 13 Oct 2006 11:03:45 +0200Subject:Re: How to print the CDATA of .xml file?Kevien Lee wrote: when i use the minidom to parase the XML file,it would ignored the section of ![CDATA[...] the code is: _document=minidom.parse(filePath) _documnetList=_document.getElementsByTagName(NodeArgs) for _argNode in _documnetList: print _argNode.nodeValue,_argNode.localName when it run. The nodeValue of the CDATA Section is always None,Is my code error?here's one way to do it, under Python 2.5: import xml.etree.ElementTree as ET tree = ET.parse (filename) for elem in tree.findall(.//NodeArgs): print elem.findtext(Disp) print elem.findtext(BtmPane/Path)/F use Python 2.5 is easy and good, but is there any others way under version 2.4? -- http://mail.python.org/mailman/listinfo/python-list
Re: Linting python code...
[EMAIL PROTECTED] writes: Christoph On Tuesday 10 October 2006 14:06, Andrew Markebo wrote: Are there any python-code linter out there Christoph PyLint (http://www.logilab.org/projects/pylint) Christoph PyChecker (http://pychecker.sf.net) New kid on the block: PyFlakes http://divmod.org/trac/wiki/DivmodPyflakes It doesn't do nearly as much as the other two but doesn't import the modules, so it can be used in places the others can't. I thought PyLint doesn't import modules either. Am I mistaken? -- Regards, Joel Rosdahl [EMAIL PROTECTED] Key BB845E97; fingerprint 9F4B D780 6EF4 5700 778D 8B22 0064 F9FF BB84 5E97 -- http://mail.python.org/mailman/listinfo/python-list
Re: Python component model
Steve Holden wrote: Paul Boddie wrote: I'm not at the cutting edge here: 20j and 20k are the commands (replace 20 with another suitable amount) which help me jump around in my editor of choice. The other commands which may be more effective just aren't in my working set. You *might* find CTRL/U and CTRL/D helpful ... Sure, even Page Up and Page Down work on decent distributions. But there's a huge collection of other commands waiting to be discovered too. I may never know them all, however. ;-) Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Linting python code...
Joel Rosdahl wrote: [EMAIL PROTECTED] writes: [PyLint, PyChecker] New kid on the block: PyFlakes http://divmod.org/trac/wiki/DivmodPyflakes It doesn't do nearly as much as the other two but doesn't import the modules, so it can be used in places the others can't. I thought PyLint doesn't import modules either. Am I mistaken? My impression was that PyLint only inspects the AST (using the astng package), whereas PyChecker can be asked to do only that, or to actually import the modules as well. Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Thread termination
G'day,As far as my understanding pertains, the thread dies shortly after the function returns (ends). You can call return anywhere within the function and kill the thread in the middle of its execution.On 13 Oct 2006 02:38:28 -0700, Teja [EMAIL PROTECTED] wrote: Hi all,Does any one know how to terminate or kill a thread that is startedwith start_new_thread() in the middle of its execution?Any pointers?Thanks in advanceTeja.-- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
RE: Thread termination
Reading from your last posts you are using COM objects. Therefore you should not kill the thread since this would lead to reference leaks. So there are only two ways left: 1. Program a specific interpreter and not use python.exe which implements an access to PyThreadState_SetAsyncExc 2. Check in the separate thread at specific times a variable which is set in the main thread. Both need the try finally construct in the threadfunction to release COM objects in the right way. I.e., (taking the source from Roger): def ThreadFunction(istream, dest): pythoncom.CoInitialize() // Initialize COM Runtime for this thread try: d=pythoncom.CoGetInterfaceAndReleaseStream(istream, pythoncom.IID_IDispatch) my_ie=win32com.client.Dispatch(d) my_ie.Navigate(dest) finally: my_ie = None // Release COM object pythoncom.CoUninitialize() // Release COM Runtime for this thread Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Click and Drag Functionality in Web Apps with Python
Fredrik Lundh schrieb: Diez B. Roggisch wrote: There is mochikit, a javascript library that makes coding in javascript suck less. and which is written by an experienced Python programmer, so it also makes your JavaScript look and feel a little more Pythonic. (not that JavaScript itself is that unpythonic, really, but some of the API:s suck pretty badly). I pretty much like the language, yes. But the environment it is deployed in suck pretty hard, especially when they stem from a north-western US state. diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Thread termination
Teja schrieb: Hi all, Does any one know how to terminate or kill a thread that is started with start_new_thread() in the middle of its execution? Any pointers? This has been discussed a bazillion times in this NG. The short answer is: no. For the long answer: do some googling :) Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Python component model
Fredrik Lundh [EMAIL PROTECTED] writes: and a zillion other more or less interesting research projects. I don't see any traces of the kind of ecosystems and market awareness that exist for Zope, Django, and TurboGears (or for that matter, Rails and Mason), for any other Python web pro- gramming tool. Twisted? -- http://mail.python.org/mailman/listinfo/python-list
Re: Efficiently iterating over part of a list
Steven D'Aprano [EMAIL PROTECTED] writes: for i in range(1, len(alist)): x = alist[i] a2 = iter(alist) a2.next() # throw away first element for x in a2: ... -- http://mail.python.org/mailman/listinfo/python-list
Re: How to print the CDATA of .xml file?
Kevien Lee wrote: import xml.etree.ElementTree as ET use Python 2.5 is easy and good, but is there any others way under version 2.4? the ET API is available for 1.5.2 and newer: http://effbot.org/zone/element-index.htm /F -- http://mail.python.org/mailman/listinfo/python-list
Need a Regular expression to remove a char for Unicode text
Hai friends, Can any one tell me how can i remove a character from a unocode text. కల్హార is a Telugu word in Unicode. Here i want to remove '' but not replace with a zero width char. And one more thing, if any whitespaces are there before and after '' char, the text should be kept as it is. Please tell me how can i workout this with regular expressions. Thanks and regards Srinivasa Raju Datla -- http://mail.python.org/mailman/listinfo/python-list
Re: SOAPpy and callback
SOAP standard doesn't provide any callback, and it looks like SOAPpy doesn't too. I remember using callbacks with Javascript and SOAP in Web pages. I was just wondering if there could be the same with Python. Thanks for your answer. -- http://mail.python.org/mailman/listinfo/python-list
Re: Freeware link/html checker (validator) for mod_python site
Hi ! Very good !!! Thank you very much ! If I can "link it" with a w3c html checker, it will be very good... Interesting that it is also say "bad link" to site http://www.druk-ker.hu/. The HTML link validator do it same. dd Fredrik Lundh rta: "durumdara" [EMAIL PROTECTED] wrote: Sorry for non-pythonic subject, but if I not find good solution, I will write a routine for this in python... :-))) in your Python installation (or source) directory, do $ cd Tools/webchecker and then write $ python webchecker.py -x http://yoursite (use --help to get a man page) /F -- http://mail.python.org/mailman/listinfo/python-list
Re: 3D Vector Type Line-Drawing Program
I'm looking for a program to do line-drawings in 3d, with output to postscript or svg or pdf, etc. I would like to describe a scene with certain 1-3d elements oriented in 3d space with dashed or colored lines and filled or transparent surfaces (or maybe semitransparent). For high quality line drawings using Python you have PyX [1]. Unfortunately it does not come with a 3D library. You probably have too look elsewere for 3D vector drawings. Some places to look are: - Asymptote [2] - Sketch [3]. A small, simple system for producing line drawings of two- or three-dimensional solid objects and scenes. Sketch generates PSTricks code for LaTeX. Both Asymptote and Sketch requires TeX/LaTeX for typesetting labels and such. Sketch is probably the closest to what you are looking for. See [4] for an example of what kind of graphics it can create. [1] http://pyx.sourceforge.net/ [2] http://asymptote.sourceforge.net/ [3] http://www.frontiernet.net/~eugene.ressler/ [4] http://www.fauskes.net/nb/threedill/ Regards, Kjell Magne Fauske -- http://mail.python.org/mailman/listinfo/python-list
Re: Insert characters into string based on re ?
Matt wrote:
I am attempting to reformat a string, inserting newlines before certain
phrases. For example, in formatting SQL, I want to start a new line at
each JOIN condition. Noting that strings are immutable, I thought it
best to spllit the string at the key points, then join with '\n'.
Regexps can seem the best way to identify the points in the string
('LEFT.*JOIN' to cover 'LEFT OUTER JOIN' and 'LEFT JOIN'), since I need
to identify multiple locationg in the string. However, the re.split
method returns the list without the split phrases, and re.findall does
not seem useful for this operation.
Suggestions?
I think that re.sub is a more appropriate method rather than split and
join
trivial example (non SQL):
addnlre = re.compile('LEFT\s.*?\s*JOIN|RIGHT\s.*?\s*JOIN', re.DOTALL +
re.IGNORECASE).sub
addnlre(lambda x: x.group() + '\n', '... LEFT JOIN x RIGHT OUTER join y')
'... LEFT JOIN\n x RIGHT OUTER join\n y'
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Re: Python component model
Fredrik Lundh wrote:
Bruno Desthuilliers wrote:
Meanwhile, the Web programming standardisation scene remains
stagnant.
Aw, come on. The Python web programming standardisation wars are over, for
now.
There's Django, and there's TurboGears,
And there's Pylons...
and a zillion other more or less interesting research projects.
I don't think Pylons qualifies as a research project. FWIW, I
mentionned it because, while (yet) less buzzworded than Django and TG,
it's really in the same category - but using the wsgi stack approach
instead of the monolithic one. And MHO is that it could really become
the next big thing in Python's web programming ecosystem.
I don't see any traces
of the kind of ecosystems and market awareness that exist for Zope, Django,
and
TurboGears (or for that matter, Rails and Mason), for any other Python web
pro-
gramming tool.
Yes, true.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
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Re: What value should be passed to make a function use the default argument value?
Antoon Pardon wrote: On 2006-10-12, Magnus Lycka [EMAIL PROTECTED] wrote: Antoon Pardon wrote: Well maybe he didn't intend that, but how is the reader of the documentation to know that? The reader can only go by how things are documented. If those are not entirely consistent with the intend of the programmer, that is not the readers fault. I don't think I ever assumed that it was right to call functions with keyword arguments if they weren't defined with keyword parameters, I'm not sure I follow here. AFAICS, you can't define keyword parameters. You can give default values to parameters but this is orthogonal to calling a function with keywords. Yup, that's a point that the documentation doesn't make stringly enough. If we somehow want to seperate parameters in those that can be used with a keyword and those that don't it has to be something different than providing a default value to that parameter. Indeed. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://holdenweb.blogspot.com Recent Ramblings http://del.icio.us/steve.holden -- http://mail.python.org/mailman/listinfo/python-list
Re: SOAPpy and callback
[EMAIL PROTECTED] schrieb: SOAP standard doesn't provide any callback, and it looks like SOAPpy doesn't too. I remember using callbacks with Javascript and SOAP in Web pages. I was just wondering if there could be the same with Python. How that? I seriously doubt that, it would mean that the server would be able to issue an request on its own to the browser - a technical impossibility in current browser implementations. Just because you used a callback inside a js-soap-implementation that works with deferreds or something similar doesn't mean that the soap itself knew callbacks. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: What's up with the starship?
Thomas Heller wrote: I cannot connect to starship.python.net: neither http, nor can I login interactively with ssl (and the host key seems to have changed as well). Does anyone know more? Nope. I got a mailing list reminder as usual at the start of the month, but I can confirm that I can't log in with my SSH private key, and that the system fingerprint has changed. Maybe some crew member can tell us what gives. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://holdenweb.blogspot.com Recent Ramblings http://del.icio.us/steve.holden -- http://mail.python.org/mailman/listinfo/python-list
Re: Need a Regular expression to remove a char for Unicode text
శ్రీనివాస wrote:
Hai friends,
Can any one tell me how can i remove a character from a unocode text.
కల్హార is a Telugu word in Unicode. Here i want to
remove '' but not replace with a zero width char. And one more thing,
if any whitespaces are there before and after '' char, the text should
be kept as it is. Please tell me how can i workout this with regular
expressions.
Thanks and regards
Srinivasa Raju Datla
Don't know anything about Telugu, but is this the approach you want?
x=u'\xfe\xff \xfe\xff \xfe\xff\xfe\xff'
noampre = re.compile('(?!\s)(?!\s)', re.UNICODE).sub
noampre('', x)
u'\xfe\xff \xfe\xff \xfe\xff\xfe\xff'
The regular expression has negative look behind and look ahead
assertions to check that there is no whitespace surrounding the ''
character. Each match then found is then replaced with the empty string
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Re: Python Best Practice References
James Stroud wrote: Wijaya Edward wrote: Can anybody suggest any references (links, books, etc)about this? I'm thinking of something similar with D.Conway's Perl Best Practice. -- Edward WIJAYA SINGAPORE Institute For Infocomm Research - Disclaimer - This email is confidential and may be privileged. If you are not the intended recipient, please delete it and notify us immediately. Please do not copy or use it for any purpose, or disclose its contents to any other person. Thank you. By all means, please start here: http://www.python.org/doc/essays/styleguide.html Nowadays I suspect PEP 8, derived from that essay, would be considered more authoritative. http://www.python.org/dev/peps/pep-0008/ regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://holdenweb.blogspot.com Recent Ramblings http://del.icio.us/steve.holden -- http://mail.python.org/mailman/listinfo/python-list
Re: Need a Regular expression to remove a char for Unicode text
à°¶à±à°°à±à°¨à°¿à°µà°¾à°¸ enlightened us with: Can any one tell me how can i remove a character from a unocode text. à°à°²à±200cహార is a Telugu word in Unicode. Here i want to remove '' but not replace with a zero width char. And one more thing, if any whitespaces are there before and after '' char, the text should be kept as it is. So basically, you want to match 200c and replace it with 200c, but only if it's not surrounded by whitespace, right? r(?!\s)\x200c(?!\s) should match. I'm sure you'll be able to take it from there. Sybren -- Sybren Stüvel Stüvel IT - http://www.stuvel.eu/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Insert characters into string based on re ?
[EMAIL PROTECTED] wrote:
Matt wrote:
I am attempting to reformat a string, inserting newlines before
certain phrases. For example, in formatting SQL, I want to start a
new line at each JOIN condition. Noting that strings are immutable, I
thought it best to spllit the string at the key points, then join
with '\n'.
I think that re.sub is a more appropriate method rather than split and
join
trivial example (non SQL):
addnlre = re.compile('LEFT\s.*?\s*JOIN|RIGHT\s.*?\s*JOIN',
re.DOTALL + re.IGNORECASE).sub addnlre(lambda x: x.group() + '\n',
'... LEFT JOIN x RIGHT OUTER join y')
'... LEFT JOIN\n x RIGHT OUTER join\n y'
Quite apart from the original requirement being to insert newlines before
rather than after the phrase, I wouldn't have said re.sub was appropriate.
addnlre(lambda x: x.group() + '\n',
select * from whatever where action in ['user left site', 'user joined
site'])
select * from whatever where action in ['user left site', 'user join\ned
site']
or with the newline before the pattern:
addnlre(lambda x: '\n'+x.group(),
select * from whatever where action in ['user left site', 'user joined
site'])
select * from whatever where action in ['user \nleft site', 'user joined
site']
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Re: Need a Regular expression to remove a char for Unicode text
On Oct 13, 4:44 am, [EMAIL PROTECTED] wrote:
శ్రీనివాస wrote:
Hai friends,
Can any one tell me how can i remove a character from a unocode text.
కల్హార is a Telugu word in Unicode. Here i want to
remove '' but not replace with a zero width char. And one more thing,
if any whitespaces are there before and after '' char, the text should
be kept as it is. Please tell me how can i workout this with regular
expressions.
Thanks and regards
Srinivasa Raju DatlaDon't know anything about Telugu, but is this the
approach you want?
x=u'\xfe\xff \xfe\xff \xfe\xff\xfe\xff'
noampre = re.compile('(?!\s)(?!\s)', re.UNICODE).sub
noampre('', x)
He wants to replace with zero width joiner so the last call should be
noampre(u\u200D, x)
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Re: Need a Regular expression to remove a char for Unicode text
On Oct 13, 4:55 am, Leo Kislov [EMAIL PROTECTED] wrote:
On Oct 13, 4:44 am, [EMAIL PROTECTED] wrote:
శ్రీనివాస wrote:
Hai friends,
Can any one tell me how can i remove a character from a unocode text.
కల్హార is a Telugu word in Unicode. Here i want to
remove '' but not replace with a zero width char. And one more thing,
if any whitespaces are there before and after '' char, the text should
be kept as it is. Please tell me how can i workout this with regular
expressions.
Thanks and regards
Srinivasa Raju DatlaDon't know anything about Telugu, but is this the
approach you want?
x=u'\xfe\xff \xfe\xff \xfe\xff\xfe\xff'
noampre = re.compile('(?!\s)(?!\s)', re.UNICODE).sub
noampre('', x)
He wants to replace with zero width joiner so the last call should be
noampre(u\u200D, x)
Pardon my poor reading comprehension, OP doesn't want zero width
joiner. Though I'm confused why he mentioned it at all.
--
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Re: Sending binary pickled data through TCP
David Hirschfield wrote: I have a pair of programs which trade python data back and forth by pickling up lists of objects on one side (using pickle.HIGHEST_PROTOCOL), and sending that data over a TCP socket connection to the receiver, who unpickles the data and uses it. So far this has been working fine, but I now need a way of separating multiple chunks of pickled binary data in the stream being sent back and forth. Questions: Is it safe to do what I'm doing? I didn't think there was anything fundamentally wrong with sending binary pickled data, especially in the closed, safe environment these programs operate under...but maybe I'm making a poor assumption? I was going to separate the chunks of pickled data with some well-formed string, but couldn't that string potentially randomly appear in the pickled data? Do I just pick an extremely unlikely-to-be-randomly-generated string as the separator? Is there some string that will definitely NEVER show up in pickled binary data? I thought about base64 encoding the data, and then decoding on the opposite side (like what xmlrpclib does), but that turns out to be a very expensive operation, which I want to avoid, speed is of the essence in this situation. Is there a reliable way to determine the byte count of some pickled binary data? Can I rely on len(pickled data) == bytes? Instead of communicating directly with the TCP socket, you could talk to it via an object which precedes each chunk with a byte count, and if you're working with multiple streams of picked data, then each chunk could also have an identifier which specified which stream it belonged to. -- http://mail.python.org/mailman/listinfo/python-list
Re: Appropriate way to quit Tkinter
On 2006-10-13, mzdude [EMAIL PROTECTED] wrote: Fredrik Lundh wrote: [snip] works for me. are you perhaps running this under some kind of IDE that keeps the process running even after the program has terminated? It works the same way if I run from IDLE or from the DOS command prompt. I had some fun trying to run Tkinter from from the Python embedded in Vim. My advice: Do not do that. -- Neil Cerutti The majority of time, it seems to be one thing or the other. --Ron Mercer -- http://mail.python.org/mailman/listinfo/python-list
Cannot force configure/setup.py to pick up location of readline (SFWrline) on Solaris 10
On a standard Solaris 10 installation with Sun-supplied open-source packages installed (like SFWrline for readline libs) I cannot seem to force Python configure/setup.py to build with readline support. SFWrline installs readline in /opt/sfw/lib /opt/sfw/include (This is all attempted with Python-2.4.3 on Solaris 10 06/06 i386) With this configure: ./configure --prefix=/opt/python-2.4.3 --enable-shared CPPFLAGS=-I/opt/sfw/include CFLAGS=-I/opt/sfw/include LDFLAGS=-L/opt/sfw/lib The resulting output includes: ... checking for rl_callback_handler_install in -lreadline... yes checking for rl_pre_input_hook in -lreadline... yes checking for rl_completion_matches in -lreadline... yes ... and config.log contains: ... ac_cv_lib_readline_rl_callback_handler_install=yes ac_cv_lib_readline_rl_completion_matches=yes ac_cv_lib_readline_rl_pre_input_hook=yes ... However, make doesn't build a readline module and I think this is because setup.py is not taking the custom *FLAGS into account. Even if I export them as environment variables, I get no readline module. How do I force the build to use the custom paths? And/or: can we teach configure/setup.py to include /opt/sfw/ when on Solaris, as this is the standard location for Sun's supplied open-source packages (ie: on the Companion disc) ? btw: an answer to this is not to install other 3rd party readline packages such as from sunfreeware.com or blastwave, as that should not be necessary when Sun supply the packages themselves (and some organisations will not allow those packages). Cheers, Chris -- http://chrismiles.info/ -- http://mail.python.org/mailman/listinfo/python-list
Re: prefix search on a large file
I did the test the way you suggested. It took not so long to realize stupid mistakes I made. Thank you. The following is the result of test with timeit(number=1) using fresh copy of the list for every iteration 0.331462860107 0.19401717186 0.186257839203 0.0762069225311 I tried my recursive-function to fix up my big-messed-list. It stops immediately because of 'RuntimeError: maximum recursion limit exceeded' I hope this trial-and-errors getting me good place... anyway, thank you. On 10/13/06, Peter Otten [EMAIL PROTECTED] wrote: js wrote: By eliminating list cloning, my function got much faster than before. I really appreciate you, John. def prefixdel_recursively2(alist): if len(alist) 2: return alist first = alist.pop(0) unneeded = [no for no, line in enumerate(alist) if line.startswith(first)] adjust=0 for i in unneeded: del alist[i+adjust] adjust -= 1 return [first] + prefixdel_recursively(alist) process stime prefixdel_stupidly : 11.9247150421 prefixdel_recursively : 14.6975700855 prefixdel_recursively2 : 0.408113956451 prefixdel_by_john: 7.60227012634 Those are suspicious results. Time it again with number=1, or a fresh copy of the data for every iteration. I also have my doubts whether sorting by length is a good idea. To take it to the extreme: what if your data file contains an empty line? Peter -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Cannot force configure/setup.py to pick up location of readline (SFWrline) on Solaris 10
Chris However, make doesn't build a readline module and I think this is Chris because setup.py is not taking the custom *FLAGS into account. Chris Even if I export them as environment variables, I get no readline Chris module. Try ./python setup.py build_ext --help There are a couple flags you can give to the build_ext command that direct to the appropriate include and library directories. It would be nice if distutils could be persuaded to listen to *FLAGS, but it doesn't. Maybe someone reading this would like to make it so. Skip -- http://mail.python.org/mailman/listinfo/python-list
edit a torrent file with python
hi, I am looking for a python script to edit .torrent files if anybody know one thx -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting MSWord Docs to PDF
On 11 Oct 2006 02:10:38 -0700, Ant [EMAIL PROTECTED] wrote: Theerasak Photha wrote: On 10/11/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: ... (La)TeX is the king of document processing, and does PDF. Except that the OP want's to print Word documents as PDF. LaTeX is good, granted, but just try converting LaTeX documents to Word or vice versa... Oh. But can't you just render Word documents to PostScript? And then ps2pdf will pick up the rest of the slack. It might not even need Python. -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
Re: Where is Python in the scheme of things?
On 10/12/06, Magnus Lycka [EMAIL PROTECTED] wrote: I feel much more productive in bash than in most Windows apps. (I still like to have several terminal windows though.) Perhaps you have used GNU screen. It's on my definitive list of winners. (As an added bonus, using screen via SSH or---heaven forfend---telnet will save you the bandwidth of having a million sessions open.) -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
Re: operator overloading + - / * = etc...
Terry Reedy wrote:
Bruno Desthuilliers [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
Terry Reedy wrote:
Bruno Desthuilliers [EMAIL PROTECTED] wrote in message
news:[EMAIL PROTECTED]
The current namespace object, of course.
Implementing a namespace as a Python object (ie, dict) is completely
optional and implementation dependent. For CPython, the local namespace
of
a function is generally *not* done that way.
I know this, and that's not the point here. The op's question seemed to
imply that the hypothetical __assign__ method should belong to the rhs
object, which is obviously not the case - it must of course belongs to
the lhs 'object'.
And my point is that in general there is no lhs object for the method to
belong to.
nitpicking
Mmm... Of course, there's always something that's being used as a
namespace. But yes, this something may not be directly accessible as a
Python object.
/nitpicking.
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
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Re: SOAPpy and callback
Diez B. Roggisch [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] [EMAIL PROTECTED] schrieb: Hello, I'm trying to find how to use a callback in a SOAP client using SOAPpy. Does SOAPpy have to manage it, or does Python include some API to do it? I've never seen any callback mentioned in SOAP. Are you sure this is possible with any SOAP implementation, at least standard-wise? Diez This is most definitely possible, in fact it is the basis for a new asynchronous data collection standard for semiconductor equipment, Interface A (replacing the ancient SECS/GEM interface, originally designed to work over RS-232). However, it is a major pain to implement. As you suggest, you cannot do this from a simple browser or pure SOAP client. To support SOAP callbacks, the client must also itself be a SOAP server. The client sends its own callback server's URL to the primary server, and when callbacks are needed, they are sent to that callback URL. This really does get quite tricky, though. For one thing, the vagaries of network identification make it unsure whether the URL composed by the client for its callback is meaningful/accessible to the server. In addition, if you are considering implementing this over the untrusted internet, you should use SSL authentication both ways (although this further complicates your client). -- Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Starting out.
Thanks Paddy. That post pretty much cleared up everything for me. On Oct 13, 12:46 am, Paddy [EMAIL PROTECTED] wrote: Ahmer wrote: Hi all! I am a 15 year old High School Sophomore. I would like to start programming in Python. In school, we are learning Java (5) and I like to use the Eclipse IDE, I also am learning PHP as well. What are some ways to get started (books, sites, etc.)? I am usually on linux, but I have a windows box and am planning on getting a mac.Pydev gives you a Python mode for Eclipse: http://pydev.sourceforge.net/ The Python tutorial is a good way to learn Python: http://docs.python.org/tut/ Some pointers on writing Python for Java programmers: http://www.ferg.org/projects/python_java_side-by-side.html I guess you are new to both Java and Python, but if you know Java and were starting Python, the following points out that certain idioms of Java do not translate well to Python: http://dirtsimple.org/2004/12/python-is-not-java.html And finally: Lets 'big-up' Python: http://www.paulgraham.com/pypar.html I hope you enjoy Python. All the best, Paddy. P.S. maybe your High school might be interested in teaching Python as a first language rather than Java? http://www.oreilly.com/pub/a/oreilly/frank/elkner_0300.html http://www.python.org/workshops/2000-01/proceedings/papers/elkner/pyY... -- http://mail.python.org/mailman/listinfo/python-list
Loops Control with Python
Can we make loops control in Python?
What I mean is that whether we can control
which loops to exit/skip at the given scope.
For example in Perl we can do something like:
OUT:
foreach my $s1 ( 0 ...100) {
IN:
foreach my $s2 (@array) {
if ($s1 == $s2) {
next OUT;
}
else {
last IN;
}
}
}
How can we implement that construct with Python?
--
Edward WIJAYA
SINGAPORE
Institute For Infocomm Research - Disclaimer -
This email is confidential and may be privileged. If you are not the intended
recipient, please delete it and notify us immediately. Please do not copy or
use it for any purpose, or disclose its contents to any other person. Thank you.
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Re: sufficiently pythonic code for testing type of function
On 10/11/06, Bruno Desthuilliers [EMAIL PROTECTED] wrote: Theerasak Photha wrote: On 10/11/06, Fredrik Lundh [EMAIL PROTECTED] wrote: can be a lot better than a 30-level traceback that ends with a line looking something like fnut.index(gah) Despite long experience with Perl, I am not a big follower of the goose_level: blah method of error reporting... also, checking for __method__ is, in general, not the right way to check if an object implements a given interface. I had a vague feeling it might not be a Right Thing(tm). flame-proof-underwearI kind of miss responds_to?/flame-proof-underwear getattr(obj, name[,default]) is your friend. Remember that methods are just callable attributes. I am familiar with getattr from the Introspection material in Dive into Python of course. Earlier in the thread we decided that using getattr is the Wrong Way(tm) to decide whether an object has such and such operation (respond_to?) because implementation details can hide this. So I learned the best thing to do is Suck It And See (an electrical joke, not a penis joke, BION) aka EAFP. I just found out Ruby isn't much better in this regard: class Foo def self.method_missing(meth, *args) puts meth end end Foo.bar() puts Foo.respond_to?(:bar) === bar false WTF? -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
Re: Starting out.
From what I can see Python and PHP have VERY simillar syntax (sorry if I offended anyone but I am a n00b.) On Oct 13, 12:54 am, [EMAIL PROTECTED] wrote: Ahmer wrote: Hi all! I am a 15 year old High School Sophomore. I would like to start programming in Python. In school, we are learning Java (5) and I like to use the Eclipse IDE, I also am learning PHP as well. What are some ways to get started (books, sites, etc.)? I am usually on linux, but I have a windows box and am planning on getting a mac.Generally good choices. I don't prefer PHP, however. For somebody who is learning programming, it encourages sloppy programming. I would suggest that you use PyDev (http://pydev.sourceforge.net/), a Python plugin for Eclipse, for Python programming. It is a helpful environment, especially for somebody already using Eclipse. For resources, I suggest you take a look athttp://wiki.python.org/moin/BeginnersGuide/NonProgrammerswhich is for non-programmers. If you feel like checking other resources, more are linked tohttp://wiki.python.org/moin/BeginnersGuide. Best luck, k -- http://mail.python.org/mailman/listinfo/python-list
Best IDE?
What do you guys use? Why? What do you like and hate about it? What platform(s) is it avalable on? How much does it cost? etc. -- http://mail.python.org/mailman/listinfo/python-list
Line algorithim for python and numeric
Hi everyone, I'm wondering if anyone knows of a way to extract data from a numeric array along a line. I have a gridded dataset which I would like to be able to choose two points and extract a 1-d array of the data values along the line between the two points. Any ideas? Thanks, Brian -- http://mail.python.org/mailman/listinfo/python-list
Re: Best IDE?
On 13 Oct 2006 07:29:09 -0700, Ahmer [EMAIL PROTECTED] wrote: What do you guys use? Why? What do you like and hate about it? What platform(s) is it avalable on? How much does it cost? etc. I use GNU Emacs 22 and a screen session. Advantages: * Comprehensive, comprehensive, comprehensive...tags support, Subversion integration, syntax highlighting, sophisticated indentation, whatever I want basically * Resource-light, contrary to the preconceived opinions some have of Emacs * Keyboard-oriented; ergonomic and fast (Xfce is set up to switch desktops by key as well) * Available on any major platform that you would want to use Python on * And it's free Disadvantages: * No UI builder...for this you can use Glade or maybe Boa Constructor * Not many else...none other that I can think of right now, actually -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
Re: Best IDE?
IDE : SPE (Stani's python editor) : http://stani.be/python/spe/blog/ Why?: because this IDE is not complicated. it ships with a debugger, a gui designer, a source code checker and a regex console. Like: obviously everything Hate: sometimes it doesn't start on windows 2000 Platform: Windows, Linux, Mac cost: free but I'll donate some money because I like it Ahmer wrote: What do you guys use? Why? What do you like and hate about it? What platform(s) is it avalable on? How much does it cost? etc. -- http://mail.python.org/mailman/listinfo/python-list
Re: Best IDE?
Ahmer wrote: What do you guys use? Why? http://tinyurl.com/ybg6p5 rd -- http://mail.python.org/mailman/listinfo/python-list
Re: Line algorithim for python and numeric
On 13 Oct 2006 07:33:17 -0700, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi everyone, I'm wondering if anyone knows of a way to extract data from a numeric array along a line. I have a gridded dataset which I would like to be able to choose two points and extract a 1-d array of the data values along the line between the two points. Any ideas? Are these all 45 degree lines or what? If not, you'll have to use trigonometry and approximate the closest matching cell. (Don't worry, Python has maths functions!! :)) -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
Re: Best IDE?
On 13 Oct 2006 07:37:07 -0700, Bernard [EMAIL PROTECTED] wrote: IDE : SPE (Stani's python editor) : http://stani.be/python/spe/blog/ Why?: because this IDE is not complicated. it ships with a debugger, a gui designer, a source code checker and a regex console. Like: obviously everything Hate: sometimes it doesn't start on windows 2000 Platform: Windows, Linux, Mac cost: free but I'll donate some money because I like it Will definitely give it a look. -- Theerasak -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Newbie question
[EMAIL PROTECTED] wrote: Is it possible to combine or bundle separate .exe files into the compiled python .exe when using py2exe? If possible, how would that be described within setup.py . and how/where would I specify such .exe should be ran first in the pre-compiled scripts? My goal is to get the total package down to as few files as possible, so I appreciate understanding how I could do this. The .exe is some low-level commands that was compiled in a separate language but I hope this little .exe can be included gracefully. Thank you for your expertise! :) AMYMC Do this with the installer instead of with py2exe. Take a look at Inno Setup (http://www.jrsoftware.org/isinfo.php). With it you can put as many files (.exe or otherwise) and have supporting .exe's run in any order you wish (after installation). This was you have only 1 file (setup.exe) that needs to be distributed. Doesn't really matter ho many files it installs when it runs, that's all hidden from the user anyway. -Larry Bates -- http://mail.python.org/mailman/listinfo/python-list
Re: edit a torrent file with python
di0rz` wrote: hi, I am looking for a python script to edit .torrent files if anybody know one thx Not sure exactly what you are looking for, but the original bittorrent client is written in Python, so you could grab a copy of it and check the code. Iain -- http://mail.python.org/mailman/listinfo/python-list
Re: always raise syntax error!
daniel wrote: thank you so much for the reply. I finally re-type all the codes where python would raise syntax error, then fixed. I did not examine every single word of my old codes though, there might be some parenthesis not matching somewhere, I guess. well, I would say, the reason why I could not position the error code may partly due to the ambiguous message that python provides. the lines that python pointed to contains no error, I think the error codes must be too far away from there. anyway, I hope python would make more detailed error messages, like c++ compilers do. such as: missing ; or ( not matching...etc. tks again.. daniel What Steve is trying to tell you is that you need to copy/paste your code (with the full traceback) in future messages. We are not mind readers out here. Occassionally I will have phantom syntax errors that seem to be attributable to non-printing characters in a line. Other times the error is in fact far above the place pointed to by the syntax error. Start by commenting out large chunks of code with triple quotes and slowly work towards the lines with a problem. -Larry Bates -- http://mail.python.org/mailman/listinfo/python-list
Re: Problems with Python 2.5 installer.
Could this happen if c:\python does not exists and creating it fails for some reason, or if permissions are incorrect? Are you installing it as a normal user or as an Administrator? I have occasionally had problems (not when installing Python) as a normal user not being allowed to create a folder at the C:\ level. I'd suggest this; (1) log on as as administrator (i.e. with full rights) (2) do an all users installation (3) You haven't come up with a good reason for doing otherwise, so read my lips: *** use the default installation folder C:\Python25 *** you'll be happy you did, when Python 2.6 comes out and you want to have both installed. It turns out the domain admin took away my local admin rights mistakenly. Once I got those back everything worked fine. The only 'logic' for my not installing to a directory with the version is that I don't keep more than one version of Python on my system at any given time. When the new version comes out and is stable I remove the old one, this forces me to check any programs against the latest version. Thanks for all of the help, Wayne -- http://mail.python.org/mailman/listinfo/python-list
Re: Line algorithim for python and numeric
I'm wondering if anyone knows of a way to extract data from a numeric array along a line. I have a gridded dataset which I would like to be able to choose two points and extract a 1-d array of the data values along the line between the two points. Any ideas? Are these all 45 degree lines or what? If not, you'll have to use trigonometry and approximate the closest matching cell. (Don't worry, Python has maths functions!! :)) There are a couple of optimal/easy cases where the run is horizontal, vertical, or as you describe, 45-degrees (where x_step = y_step or x_step = -y_step) Any other set of arbitrary points, and you will have to specify the behavior a little more finely. You can use something like Bresenham's algorithm to march either over or up and over to just pick out the one point at each step that falls closest to the actual line along the run. There's also the Wu Anti-aliasing line algorithm which takes something akin to Bresenham's algorithm and then samples the potential points to yield an anti-aliased result which averages the two potential data-points (traditionally colors, but they could really be any average-able data values). I'm not sure I've seen either of them implemented in Python before (though actually *looking* for them might increase those odds ;-) http://en.wikipedia.org/wiki/Xiaolin_Wu's_line_algorithm has details and a pseudo-code implementation (which shouldn't be too far from the Python code). It's also got links to stuff on Bresenham's. -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting MSWord Docs to PDF
On 2006-10-13, Theerasak Photha [EMAIL PROTECTED] wrote: On 11 Oct 2006 02:10:38 -0700, Ant [EMAIL PROTECTED] wrote: Theerasak Photha wrote: On 10/11/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: ... (La)TeX is the king of document processing, and does PDF. Except that the OP want's to print Word documents as PDF. LaTeX is good, granted, but just try converting LaTeX documents to Word or vice versa... OpenOffice will print directly to PDF, and it does a fair job of opening MS Word documents. I don't know if you can control OOo directly from Python or print from the command line (OOo doesn't seem to have a man page). Oh. But can't you just render Word documents to PostScript? Yes. And then ps2pdf will pick up the rest of the slack. Yes. That's how the various free PDF printer drivers for Windows work. It might not even need Python. Not unless you're trying to automate the process somehow. -- Grant Edwards grante Yow! I wish I was a at sex-starved manicurist visi.comfound dead in the Bronx!! -- http://mail.python.org/mailman/listinfo/python-list
Re: Python component model
Peter Wang wrote: Edward, This isn't in response to any specific one of the 100+ posts on this thread, but I justed wanted to encourage you to continue your investigation into Python component models and maybe looking for some common ground between them. Frequently the individual developers are too heads-down on working on their own things to do a broad survey, so I think this would be very useful indeed. I wouldn't have felt it necessary to post this except for the large number of posts along the lines of foo.dict is introspective enough for me!. I think you might have an easier time evangelizing the principle of component-oriented programming (or event-based, or reactive, or whatever) if you separated it from the notions of RAD UI development. There is a very large difference between writing components and writing objects, and it seems that most people arguing python doesn't need components don't see this distinction. For me, it's the difference between writing live objects and dead objects. Live objects not only encapsulate implementations of an interface with some state, but they also encapsulate handling of events, i.e. responses to changes in their environment. Dead objects have methods but there has to be a function somewhere that knows which dead object to call with what parameters at exactly the right time. (The only mechanism for managing this complexity is to create ever more functions at ever higher levels of abstraction, or to have a proliferation of nebulously-defined manager objects.) IMHO once you cross this chasm and are able to model your problem domain with live objects that go off and automatically respond to the runtime environment and Do the Right Thing, it's very hard to go back to a dead object mindset. I can understand, however, that until one makes this leap, it might seem like an academic and useless distinction. -peter Excellent post, Peter. Thanks for great clarification. Looking from a physicist' perspective, im always trying to compare/evaluate languages from the physical reality/dynamics angle. So, the run-time space/dynamics is the only one that matches the natural always-runtime objects - atoms, molecules, EM fields, biological cells(?). It is the *reactive* world with event/forces-driven dynamics. Seemingly, there is nothing beyond that, including biology. The essential feature of that runtime world is the persistence or (in physical terms) the built-in memory/storage mechanism (soft degrees of freedom), so that an event (and response to it) changes the object. The persistence is obvious in biology, but also is very important in (bio)molecular dynamics. From that physics/QM angle, a generic (always-live) object which learns the environment (by building *and updating* its responses) seems to be a quite adequate representation for a real physical object. But this seems to be already available in Python, right? The Enthought' Traits that describes (physical) properties and their dynamics seems to be a critically important component of that vision, and i admire the Enthought' people vision and practical efforts. Keep on and good luck! run-time-ly, y'rs Val Air Force Research Lab Hanscom AFB, MA [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Best IDE?
On 2006-10-13, Ahmer [EMAIL PROTECTED] wrote: What do you guys use? jed along with bash et. al. Why? Because it's efficient and it's what I use for all other languages. What do you like and hate about it? If there was something I hated about it, I wouldn't use it. What platform(s) is it avalable on? Unix/Linux and Win32. How much does it cost? Nothing. etc. 42 -- Grant Edwards grante Yow! I'd like TRAINED at SEALS and a CONVERTIBLE on visi.commy doorstep by NOON!! -- http://mail.python.org/mailman/listinfo/python-list
