[Tutor] What algorithm suits here
I have a list of dictionaries in this form.
{ message : xyz
parent : 23
id : 25
}
or
{ message : abc
parent : None
id : 25
}
{ message : cde
parent : 28
id : 32
}
{ message : cde
parent : 23
id : 35
}
I want to make seperate the lists such that messages in same thread(
The parent message and its child messages } come together . What is
the best algorithm here
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Re: [Tutor] Editing html using python
Well ya I was kind of hoping to know about more tools and recommendations on how to edit broken html . Their were tags that I wanted to replace using beautifulSoup however i saw that the replacewith function was not available for many of the tags I wanted to replace . Also BeautifulSoup does not have unicode support . So in a sense I did want recommendation perhaps I should have put my question in a better manner . ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Editing html using python
Hi I need to edit html programmatically . Sadly the html might be broken at places . I was using BeautifulSoup but there were lots of problems and it is also not maintained can some one guide me to any tutorials on editing html using lxml . -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] python wsgi
Hi , How do I run a python script using wsgi? I am not using any web framework I just wish to try out running a simple script. -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] idiomatic way of merging two dictionaries
Hi , I am trying to merge(I am not sure if that is the right term)
dictionaries like this
dict1 ={'a':4,'b':3,'v':7,'h':4}
dict2={'a':5,'v':4,'k':3}
dict3 would be {'a':[4,5],'b':[3,4],'v':[7,4],'k':[0,3],'h':[4,0]}
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[Tutor] java for python programmers
Hi their is a book , python for java programmers is their a book on java for python programmers for some one who wants to move to java from python -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] python zlib problem
Hi , For some weird reason or a huge screw up I did my python zlib library has been removed . This is part of standard lib(i think!!!) and it is used by setuptools and many other libraries .What is the safe way in which I can recover this library on ubuntu. My previous try somehow lead to removal of ubuntu-desktop... If this is not the list I should be asking this I am sorry -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Currency conversion module in python
Hi , Does anybody know of any currency conversion module in python -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] How to force stop a thread
Hi , I am trying to implement python threads in a gtk based app . Now the thing is that in the application I have to fetch a lot of data from various sources from web. During this time I wish to show a dialog that indicates it to the user . During the same time I want to fetch data as well . Now to implement this I have done: a=Wait_dialog() gtk.gdk.threads_init() lock=thread.allocate_lock() thread.start_new_thread(show_dialog,(lock,a)) thread.start_new_thread(fetch,(lock,a)) Now I wish to stop the thread that shows the dialog so I can destroy the dialog and continue with normal app I am not able to understand how to do that ... Also is this the best way to do this kind of thing??? -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] how to monitor if their data in a variable/object
Hi , I am writing a python gtk application in which I am required to fetch a large amount of data from web , now i want to create a wait dialog for the user to know that I am still fetching data .The question is how can i monitor that the required data has been fetched . I could have a variable that is given a particular value when data has been fetched . But how can I keep checking if the variable has got a value or not. -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Very wierd namespace problem
I am not able to understand this , perhaps it is an aspect of python I do not understand Now usually I would think that for a class class a: ... def __init__(self): ... pass ... def __something__(self): ... pass >>> b=a() >>> dir(b) ['__doc__', '__init__', '__module__', '__something__'] This should be correct so now i can refer one of these functions from the object of the same class as obj.__something__() now I have created a class with some functions defined in it but the thing is that they are named in a completely different manner?(or so I think) <__main__.SmPriceWindow instance at 0x9dd448c> ['_SmPriceWindow__add_columns', '_SmPriceWindow__create_model', '_SmPriceWindow__review_button_click', '_SmPriceWindow__show_all', '_SmPriceWindow__url_button_click', '__doc__', '__init__', '__module__', 'model', 'tree', 'window'] Traceback (most recent call last): File "smnotebook3.py", line 135, in price_button_pressed sw.__show_all() AttributeError: SmPriceWindow instance has no attribute '__show_all' I have refered to these functions(__add_columns ,__create_model etc ... as self.__add_columns as would be expected in the class itself ) This functionality is unexpected according to me Since I cannot take much of the space here explaining the code I have pasted here: http://pastebin.com/mddf7a43 -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] gtk.Notebook error
Hi ,
I am having problem with adding pages to gtk.Notebook :
What I want is to be able to pass a random container widget to a new tab:
thus my code is :
class SmNotebook(gtk.Notebook):
def __init__(self):
gtk.Notebook.__init__(self)
#set the tab properties
self.set_property('homogeneous', True)
#we do not show the tab if there is only one tab i total
self.set_property('show-tabs', True)
def new_tab(self,widget_to_render,title='Page'):
nbpages = self.get_n_pages()
self.append_page(widget_to_render)
Now while creating I do :
def new_tab(widget,widget_render):
notebook.new_tab(widget_render)
notebook = SmNotebook()
box.pack_start(notebook)
box2=gtk.VBox()
icons = gtk.STOCK_ABOUT
image = gtk.Image()
image.set_from_stock(icons, gtk.ICON_SIZE_DIALOG)
box2.pack_start(image,False)
button.connect("clicked", new_tab,box2)
* I have deleted the parts of the code that did not seem to be
required . The later part of the code is just for testing..
when I do this I get a warning : smnotebook.py:18: GtkWarning:
Can't set a parent on widget which has a parent.
what am I doing wrong here??
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Re: [Tutor] getting image from url
I am sorry, I did not realize the problem was in the location .Ignore
the message
On Fri, Jul 10, 2009 at 9:19 PM, Emile van Sebille wrote:
> On 7/10/2009 8:29 AM Amit Sethi said...
>>
>> Hi , I am trying to get images from url
>>
>> Their is a mail relating to it here :
>> "http://mail.python.org/pipermail/python-list/2001-October/108548.html";
>>
>> but when i followed similar procedure :
>>
>>>>> import urllib
>>>>> fp =
>>>>> urllib.urlopen("http://en.wikipedia.org/wiki/File:Portrait_john_calvin.jpg";)
>>>>> img = cStringIO.StringIO(fp.read())
>
> Right here, try...
>
> img.read()[:50]
>
> ... and it should become clear what the problem is...
>
> HTH,
>
> Emile
>
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[Tutor] getting image from url
Hi , I am trying to get images from url
Their is a mail relating to it here :
"http://mail.python.org/pipermail/python-list/2001-October/108548.html";
but when i followed similar procedure :
>>> import urllib
>>>fp =
>>>urllib.urlopen("http://en.wikipedia.org/wiki/File:Portrait_john_calvin.jpg";)
>>>img = cStringIO.StringIO(fp.read())
>>> Image.open(img)
Traceback (most recent call last):
File "", line 1, in
File "/usr/lib/python2.5/site-packages/PIL/Image.py", line 1917, in open
raise IOError("cannot identify image file")
IOError: cannot identify image file
what is wrong?? how can I rectify...
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Re: [Tutor] intefaces in python
well dir(object) , how would that help . All the functions in base class would automatically be inherited by the objects of plug-in class ... so they would come in the list even if it was not implemented... On Mon, Jun 29, 2009 at 5:58 PM, Luke Paireepinart wrote: > Amit Sethi wrote: >> >> I think ideally i want a compile Error just like java .. > > Why? For developers, so they'll know if their plugin meets the interface > requirements? > Have you considered just making a unit test that will call all interface > functions with appropriate parameters? Then they can just run the test on > their code and if it passes they will know they implemented the minimum > required functions (whether they do what they're supposed to do is a > different story...) It would provide the same level of interface security > as Java would, except it would allow them to decide how much of the contract > they need to enforce for their specific application. That's one of the > things I like about python... for example, if I want to override stdout so > all my print statements go to a file, I just have to create a new class that > has a write() method that writes anything it's passed to a file... I don't > have to implement all of the other functionality that whatever object > resides there before has. So in that case, if I ran your unit test on my > replacement stdout, it may say "Hey, you failed the writeline() test, your > object doesn't have this!" but since I know I'm not going to use writeline, > I can just ignore the warning. Or if I meant for it to have writeline, I > can say "oh snap I need to go implement writeline!" But as I said, that > wouldn't enforce the interface, just inform them of it if they desired that, > which I would personally prefer but you may not. > That's really the idea behind duck typing. Assume that they wrote > sufficient code to handle whatever you use it for and if they didn't it'll > blow up in their face. >> >> @Dave Angel >> >> You have said >> "you could arrange that when the plugin is first encountered, you >> validate that it has all the required methods and data members. Not >> by calling them, but by scanning the object for their existence." >> >> that would be ideal ... can you enlighten me on this how may one do that. >> >> > > Not sure if it's what he meant, but you can just do a dir(object) and it > will return a list with all method / member names. then you could just > confirm that the names are there. > -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] intefaces in python
wait even in the above example i would have to run all the functions in __init__ that is plain stupid ... i was just brain storming On Mon, Jun 29, 2009 at 5:34 PM, Amit Sethi wrote: > I think ideally i want a compile Error just like java .. but from the > discussion here ... i wrote this little example: > > class a(object): > def __init__(self): > self.query() > try: > if self.query_not_implemented==True: > raise NotImplementedError > except AttributeError: > pass > def query(self): > self.query_not_implemented=True > > At least by this when ever the derived class object is created without > implementing a particular function ,it raises a NotImplementedError > which i can later use. > > > @Dave Angel > > You have said > "you could arrange that when the plugin is first encountered, you > validate that it has all the required methods and data members. Not > by calling them, but by scanning the object for their existence." > > that would be ideal ... can you enlighten me on this how may one do that. > > > On Mon, Jun 29, 2009 at 5:01 PM, Dave Angel wrote: >> >> Amit Sethi wrote: >> >>> Well I want to implement plug-in like mechanism for an application . I want >>> to define some minimum functions that any body writing a plugin has to >>> implement. For that i thought an interface would be best because in a >>> scenario where the function is not implemented some kind of error would >>> occur. I would love to hear if you think their is a better way to achieve >>> this >> >> In Java, deriving a class from such an interface, but neglecting to >> implement those methods will cause a compile error (if I recall correctly, >> it's been several years). In Python, the error will happen at run time. >> But an existing runtime error will occur even without such an interface, so >> it wouldn't seem you gain much. In Python, the interface does two things: >> >> 1) it's a comment, a common place to look for certain behavior. >> 2) it's potentially a source for an IDE to provide tool-tips or code >> completion >> 3) it can generate a different error, which is perhaps more useful to the >> developer unsure of how the method is spelled or used. This way he/she >> knows whether to fix the caller or the implementation. >> >> #3 seems valid to me. >> >> >> >> However, for the particular use-case, you might want to stretch a bit >> further. Since you've got one "user" (your code), and many "providers" (the >> plug-in writers) perhaps you could arrange that when the plugin is first >> encountered, you validate that it has all the required methods and data >> members. Not by calling them, but by scanning the object for their >> existence. >> >> >> ___ >> Tutor maillist - tu...@python.org >> http://mail.python.org/mailman/listinfo/tutor > > > > -- > A-M-I-T S|S > -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] intefaces in python
I think ideally i want a compile Error just like java .. but from the discussion here ... i wrote this little example: class a(object): def __init__(self): self.query() try: if self.query_not_implemented==True: raise NotImplementedError except AttributeError: pass def query(self): self.query_not_implemented=True At least by this when ever the derived class object is created without implementing a particular function ,it raises a NotImplementedError which i can later use. @Dave Angel You have said "you could arrange that when the plugin is first encountered, you validate that it has all the required methods and data members. Not by calling them, but by scanning the object for their existence." that would be ideal ... can you enlighten me on this how may one do that. On Mon, Jun 29, 2009 at 5:01 PM, Dave Angel wrote: > > Amit Sethi wrote: > >> Well I want to implement plug-in like mechanism for an application . I want >> to define some minimum functions that any body writing a plugin has to >> implement. For that i thought an interface would be best because in a >> scenario where the function is not implemented some kind of error would >> occur. I would love to hear if you think their is a better way to achieve >> this > > In Java, deriving a class from such an interface, but neglecting to implement > those methods will cause a compile error (if I recall correctly, it's been > several years). In Python, the error will happen at run time. But an > existing runtime error will occur even without such an interface, so it > wouldn't seem you gain much. In Python, the interface does two things: > > 1) it's a comment, a common place to look for certain behavior. > 2) it's potentially a source for an IDE to provide tool-tips or code > completion > 3) it can generate a different error, which is perhaps more useful to the > developer unsure of how the method is spelled or used. This way he/she knows > whether to fix the caller or the implementation. > > #3 seems valid to me. > > > > However, for the particular use-case, you might want to stretch a bit > further. Since you've got one "user" (your code), and many "providers" (the > plug-in writers) perhaps you could arrange that when the plugin is first > encountered, you validate that it has all the required methods and data > members. Not by calling them, but by scanning the object for their existence. > > > ___ > Tutor maillist - tu...@python.org > http://mail.python.org/mailman/listinfo/tutor -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] intefaces in python
Well I want to implement plug-in like mechanism for an application . I want to define some minimum functions that any body writing a plugin has to implement. For that i thought an interface would be best because in a scenario where the function is not implemented some kind of error would occur. I would love to hear if you think their is a better way to achieve this On Mon, Jun 29, 2009 at 2:49 PM, Alan Gauld wrote: > "Amit Sethi" wrote > >> class MyInterface(object): >> doSomething(line): >> raise NotImplementedError >> doSomethingElse(line): >> raise NotImplementedError >> >> I think that is exactly the kind of structure i was looking for ... >> > > As a matter of interest, why? What do you anticipate using this for? > I have found a few cases where abstract interfaces are useful but they are > very few and far between. > > -- > Alan Gauld > Author of the Learn to Program web site > http://www.alan-g.me.uk/ > > > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] intefaces in python
class MyInterface(object):
doSomething(line):
raise NotImplementedError
doSomethingElse(line):
raise NotImplementedError
I think that is exactly the kind of structure i was looking for ...
On Mon, Jun 29, 2009 at 12:58 PM, Andre Engels wrote:
> On Sun, Jun 28, 2009 at 5:00 PM, Amit Sethi
> wrote:
> > Hi , I don't suppose python has a concept of interfaces. But can somebody
> > tell me if their is a way i can implement something like a java
> interface
> > in python.
>
> Sure. Interfaces are just Java's compensation for not having multiple
> inheritance. Python does have multiple inheritance, so that's what one
> would use. Although one could also use duck typing, and then use
> 'nothing' as an implementation...
>
> More specific:
>
>
> Java Interface:
> public interface MyInterface {
>string doSomething(string line);
>string doSomethingElse(string line);
> }
>
> Java Implementation:
> public class MyImplementation {
> string doSomething(string line) {
> return "I did something with" + line;
> }
> string doSomethingElse(string line) {
> return "I did something else."
> }
> }
>
> ==
> Python Interface:
>
> class MyInterface(object):
>doSomething(line):
>raise NotImplementedError
>doSomethingElse(line):
>raise NotImplementedError
>
> Python Implementation:
> class MyImplementation(MyInterface):
>doSomething(line):
>return "I did something with "+line
>doSomethingElse(line):
>return "I did something else."
>
> ==
> Python interface using duck typing:
>
> # Hey guys, when you call something a 'MyInterface', it needs methods
> doSomething and doSomethingElse
>
> Python Implementation using duck typing:
>
> class MyImplementation(object):
># These things implement MyInterface
>doSomething(line):
>return "I did something with "+line
>doSomethingElse(line):
>return "I did something else."
>
>
> --
> André Engels, andreeng...@gmail.com
>
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[Tutor] intefaces in python
Hi , I don't suppose python has a concept of interfaces. But can somebody tell me if their is a way i can implement something like a java interface in python. -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] taking image of gtk.drawing area
Hi ,
I am trying to take image of a gst video playing in the gtk.drawingarea i am
using following code for it :
def snap_shot(self,widget,data=None):
global file_loc ,pixbuf
self.pipeline.set_state(gst.STATE_PAUSED)
pixbuf = gtk.gdk.Pixbuf( gtk.gdk.COLORSPACE_RGB, False, 8, 640, 480)
pixbuf.get_from_drawable( self.movie_window.window,
self.movie_window.get_colormap(), 0, 0, 0, 0, 640, 480)
file_loc="/tmp/bar%d"%time.time()
pixbuf.save(file_loc,'jpeg', {'quality':'100'})
self.pipeline.set_state(gst.STATE_PLAYING)
but the movie seems to momentarily stop and i am left with a dark image
where i might be going wrong??
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[Tutor] Using C in python
what are the ways in which i can use C in python programs . I know there is SWIG bindings are there any other . Also Could anyone explain how Swig bindings work? -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] Designing Tools/books
Although this may not be the most appropriate place to ask this but i couldn't figure out where else i should be asking this question.I am getting habitual of starting projects and getting results quickly thanks to python .But I get stuck in documentation because i haven't asked the design questions through and through.Although my projects work for college because they are not large scale and do not require optimum quality control so this problem only seems to come during documentation but i believe this will be a pain when i do this professionally.So my question is please guide me to good internet resources ,books and tools that talk about design especially with python in mind. Also they follow Agile Software development model or any other latest development cycle used in the industry . -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] passing unknown no of arguments
>> AFAIK MS Silverlight allows you to run .NET languages in your browser, so for that i guess i would have to use ironpython and not Cpython which is what i normally use . Are there any big problems porting the code from one to other that i need to be worried about. On Fri, Feb 6, 2009 at 12:30 AM, Alan Gauld wrote: > > "Kent Johnson" wrote > >> >> From the Silverlight FAQ: >>> >> Silverlight will support all major browsers on both Mac OS X, Linux >> and on Windows. >> > > I briefly tried and failed to get it working on MacOS X and lost interest. > Looks like I might be a bit premature in ignoring it. I'll have another > go... > > Alan G. > > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] passing unknown no of arguments
How do you pass arguments of unknown no. of arguments to a function. Also how can i run my python scripts in a web browser. -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] fetching wikipedia articles
well thanks ... it worked well ... but robotparser is in urllib isn't there
a module like robotparser in
urllib2
On Fri, Jan 23, 2009 at 3:55 PM, Andre Engels wrote:
> On Fri, Jan 23, 2009 at 10:37 AM, amit sethi
> wrote:
> > so is there a way around that problem ??
>
> Ok, I have done some checking around, and it seems that the Wikipedia
> server is giving a return code of 403 (forbidden), but still giving
> the page - which I think is weird behaviour. I will check with the
> developers of Wikimedia why this is done, but for now you can resolve
> this by editing robotparser.py in the following way:
>
> In the __init__ of the class URLopener, add the following at the end:
>
> self.addheaders = [header for header in self.addheaders if header[0]
> != "User-Agent"] + [('User-Agent', '')]
>
> (probably
>
> self.addheaders = [('User-Agent', '')]
>
> does the same, but my version is more secure)
>
> --
> André Engels, andreeng...@gmail.com
>
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Re: [Tutor] fetching wikipedia articles
so is there a way around that problem ??
On Fri, Jan 23, 2009 at 2:25 PM, Andre Engels wrote:
> On Fri, Jan 23, 2009 at 9:09 AM, amit sethi
> wrote:
> > Well that is interesting but why should that happen in case I am using a
> > different User Agent because I tried doing
> > status=rp.can_fetch('Mozilla/5.0',
> > "http://en.wikipedia.org/wiki/Sachin_Tendulkar";)
> > but even that returns false
> > Is there something wrong with the syntax , Is there a catch that i don't
> > understand.
>
> The problem is that you are using the standard Python user agent when
> getting the robots.txt. Because the user agent is refused, it cannot
> get the robots.txt file itself to look at.
>
> --
> André Engels, andreeng...@gmail.com
>
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Re: [Tutor] fetching wikipedia articles
Well that is interesting but why should that happen in case I am using a
different User Agent because I tried doing
status=rp.can_fetch('Mozilla/5.0', "
http://en.wikipedia.org/wiki/Sachin_Tendulkar";)
but even that returns false
Is there something wrong with the syntax , Is there a catch that i don't
understand.
On Thu, Jan 22, 2009 at 10:45 PM, Andre Engels wrote:
> On Thu, Jan 22, 2009 at 6:08 PM, amit sethi
> wrote:
> > hi , I need help as to how i can fetch a wikipedia article i tried
> changing
> > my user agent but it did not work . Although as far as my knowledge of
> > robots.txt goes , looking at en.wikipedia.org/robots.txt it does not
> seem it
> > should block a useragent (*, which is what i would normally use) from
> > accesing a simple article like say
> > "http://en.wikipedia.org/wiki/Sachin_Tendulkar"; but still robotparser
> > returns false
> > status=rp.can_fetch("*", "http://en.wikipedia.org/wiki/Sachin_Tendulkar
> ")
> > where rp is a robot parser object . why is that?
>
> Yes, Wikipedia is blocking the Python default user agent. This was
> done to block the main internal bot in its early days (it was
> misbehaving by getting each page twice); when it got to allowing the
> bot again, it had already changed to having its own user agent string,
> and apparently it was not deemed necessary to unblock the user
> string...
>
>
>
>
> --
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> ___
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[Tutor] fetching wikipedia articles
hi , I need help as to how i can fetch a wikipedia article i tried changing
my user agent but it did not work . Although as far as my knowledge of
robots.txt goes , looking at en.wikipedia.org/robots.txt it does not seem it
should block a useragent (*, which is what i would normally use) from
accesing a simple article like say "
http://en.wikipedia.org/wiki/Sachin_Tendulkar"; but still robotparser returns
false
status=rp.can_fetch("*", "http://en.wikipedia.org/wiki/Sachin_Tendulkar";)
where rp is a robot parser object . why is that?
--
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Re: [Tutor] python reverse engineering tools
Well actually there was an interesting tool i discovered, Lumpy . http://www.greenteapress.com/thinkpython/swampy/lumpy.html which was developed with the intention of being a teaching tool. Although it would be a nice idea if the people in this list evaluate it and give their response because I as a beginner don't think can comment on its effectiveness. On Sat, Nov 22, 2008 at 6:17 AM, Alan Gauld <[EMAIL PROTECTED]>wrote: > > "amit sethi" <[EMAIL PROTECTED]> wrote > > Can somebody tell me about any python to UML reverse engineering tools . >> > > I can't help wit the specific but I can give a word of caution on > reverse engineering from code to UML - don't expect too much! > > The problem is that in a dynamic language it is very hard > for the reverse engineering to determine types of attributes > etc so everything tends to end up pointing at object - the > common superclass. That results in class diagrams that > are less than meaningful and an unreadable mess of > spaghetti pointing to one place. > > Actually this tends to happen even on well designed > static language programs too since most OOP interrfaces > should be defined in terms of superclasses. UML to code > works well because the designer controls the connectivity > in the diagram, code to UML tends to be less successful > in my experience (Lisp, Smalltalk and C++) and leaves > almost as much work as manually reverse engineering. > > However if you do find something that works please > let us know! > > -- > Alan Gauld > Author of the Learn to Program web site > http://www.freenetpages.co.uk/hp/alan.gauld > > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] python reverse engineering tools
Can somebody tell me about any python to UML reverse engineering tools . I was trying pynsource but it uses the old opengl namespace (this is what i assume the problem is from what i read from the openGL documentation) and thus it gives an import error from wxPython.ogl import * ImportError: No module named ogl now i tried changing it to (again from documentation) import wx.lib.ogl as ogl but it still does not work. Can somebody tell me what the problem might be . -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] sqlite3 lists to database conversion/ using python variables in sqlite3
Hi , i am trying to learn python and this is my first time with any
databases . I am using sqlite3 to create a database of my music files and
its
metadata tags so here is what i wanted to do . Two list one of the
attributes and one of their values ,how do i put it in the database.Here is
a simple code i think should work but isn't?
>>> import sqlite3
>>> conn=sqlite3.connect('/tmp/example2')
>>> c = conn.cursor()
>>> list1=['hello','hi']
>>> list2=['a','b']
>>>c.execute('''create table ABC(hello text,hi text)''')
>>> list1_value= ",".join(list1)
>>> list2_value= ",".join(list2)
>>> c.execute('''insert into ABC (%s) values
(%s)''')%(list1_value,list2_value)
This is the error it generates
sqlite3.OperationalError: near "%": syntax error
why doesn't this work . Can someone please explain
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[Tutor] XML parsing with SAX
Sorry , I didn't follow the format of posting to the group. Well I am new to xml and python . What I basically want to do is to read elements from the xml which is by the way large ~2GB and read the attributes and make a decision as to whether i want to keep that element or not . I am told that xml.sax is good for reading a large xml file because it can read from a stream but what about writing the xml file back Thank you for your help. On Wed, Oct 22, 2008 at 1:49 PM, Alan Gauld <[EMAIL PROTECTED]>wrote: > "amit sethi" <[EMAIL PROTECTED]> wrote > > Please, always use a meaningful subject line when posting! > and do not reply to an existing thread, changing the subject. > These things mess up threaded reading tools such as gmane > and newsreaders. This reduces your chances of a reply. > > Hi can any body give me an example as to how i can use Incremental Parser >> in >> xml.sax >> > > If you look in the XML Topic Guide section of the Python web site there > is a full tutorial on using SAX. This is a good starting point: > > http://pyxml.sourceforge.net/topics/docs.html > > But frankly I'd strongly advise you to look at ElementTree if you are > parsing XML. Its much easier to use. The only time I'd use sax nowadays > is if I was porting code from some other sax based solution. > > http://effbot.org/zone/element-index.htm > > -- > Alan Gauld > Author of the Learn to Program web site > http://www.freenetpages.co.uk/hp/alan.gauld > > ___ > Tutor maillist - Tutor@python.org > http://mail.python.org/mailman/listinfo/tutor > -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] (no subject)
Hi can any body give me an example as to how i can use Incremental Parser in xml.sax -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] (no subject)
hi, Can somebody tell me about tools to convert stereo mp3 signal to mono wave signal . I tried using pymedia but i am not able to understand how to convert stereo signal to a mono signal . -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] (no subject)
Hi list , Can someone give me an idea about the audio libraries in python . I tried using pymedia . What are the options available . -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] (no subject)
Hi , Could you please tell me , how i can traverse a two dimensional array , i am sorry , it must be pretty simple but I am new to python am not able to understand. -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] (no subject)
Hi , Are there any python bindings for sox(sound Exchange). -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] handling MIDI in python
Can someone tell me about the libraries that can handle MIDI files and also is their a way in which I can convert an mp3 and wav file into a Midi file within a python program -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
[Tutor] (no subject)
Hi, I am a student new to python . I had a project idea in mind that I want to implement in my break using python . Can anyone give me an idea of libraries available in python for transcribing music and signal processing. Good tutorials with examples would also help. If any body has experience in the field it would be nice if you could give me some guidance . And also direct me to articles , references ,essays on the subject of pattern recognition and music summary . Also I would like to look at open source projects related to the above . Thank you everyone . -- A-M-I-T S|S ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
