Re: which IDE is highly recommended in Windows OS
On 8 13 , 10 09 , Ge Chunyuan <[EMAIL PROTECTED]> wrote: > hi Group: > > I am a new comer for Python, I wonder which IDE is recommended in > Windows OS. > Can anyone give some suggestion. > > Thanks indeed > Ge Chunyuan javaeclipse pydev eclipse -- http://mail.python.org/mailman/listinfo/python-list
Re: Module imports during object instantiation
Ritesh Raj Sarraf a écrit : > Hi, > > I've been very confused about why this doesn't work. I mean I don't see any > reason why this has been made not to work. > > class Log: > > def __init__(self, verbose, lock = None): > > if verbose is True: Don't use an identity test here. There are quite a lot of values that eval to either True or False in a boolean context without being the True or False objects. > self.VERBOSE = True > else: self.VERBOSE = False Also, this test is rather dumb - in fact you just don't need any test: self.VERBOSE = bool(verbose) > > if lock is None or lock != 1: > self.DispLock = False > else: > self.DispLock = threading.Lock() > self.lock = True > > if os.name == 'posix': >self.platform = 'posix' >self.color = get_colors() > > elif os.name in ['nt', 'dos']: > self.platform = 'microsoft' > > try: > import SomeModule > except ImportError: > self.Set_Flag = None > > if self.Set_Flag is not None: > self.color = SomeModule.get_colors_windows() > > else: > self.platform = None > self.color = None > > When I create an object the "import" part never gets executed. Is there a > reason behind it ? what does "print os.name" yields ? > I mean I'd like to keep my class as independent as I want. So that when > later I need to use it somewhere else, I don't need to know if it depends > on any modules. > Then pass the module to the initializer. Python's modules are objects... -- http://mail.python.org/mailman/listinfo/python-list
Re: Module imports during object instantiation
Ritesh Raj Sarraf a écrit : > On Aug 11, 3:17 am, James Stroud <[EMAIL PROTECTED]> wrote: >> You do realize your import statement will only be called for nt and dos >> systems don't you? >> > > Yes. I would like to load a Windows Python Module (which is, say a > specific implementation for Windows only) in such a condition where I > find that the platform is Dos/NT. > > Loading it globally doesn't make sense because when from the same > class an object is created on a non-windows platfom, it would be > waste. It would either ImportError or else just load the module and > never use it. > > As per my understanding __init__ is executed only once during object > creation. For such situations (that I've explained above), I think > __init__() is the correct place to put imports. Nope. The initializer will be called *each time* you instanciate the class. And nothing prevents client code from calling it explicitelly as many times as it wants - ok, this would be rather strange, but this is still technically possible. What I mean that you have no assurance about the number of times an initializer will be called. wrt/ your problem, remember that top-level code is executed when the module is loaded (either as a main program or as an imported module). The canonical solution to os-specific imports is to handle them at the top-level: if os.name == 'posix: from some_posix_module import get_colors elif os.name in ['nt', 'dos']: from some_nt_module import get_windows_color as get_colors else: get_colors = lambda: None # or any other sensible default value... class SomeClass(object): def __init__(self, *args, **kw): self.colors = get_colors() -- http://mail.python.org/mailman/listinfo/python-list
Car Air Conditioners
All the informations about car air conditioners can be found on this website... http://car-air-conditioning.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: which IDE is highly recommended in Windows OS
On Aug 13, 10:24 am, _spitFIRE <[EMAIL PROTECTED]> wrote:
> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
>
> Ge Chunyuan wrote:
> > hi Group:
>
> > I am a new comer for Python, I wonder which IDE is recommended in
> > Windows OS.
> > Can anyone give some suggestion.
>
> > Thanks indeed
> > Ge Chunyuan
>
> - - Stani's Python Editor
> (http://www.softpedia.com/get/Programming/Coding-languages-Compilers/S...)
> - - Black Adder (http://www.thekompany.com/products/blackadder/)
> - - Zeus (http://www.zeusedit.com/python.html)
> - - PyScripter (http://mmm-experts.com/Products.aspx?ProductId=4)
> - - ActivePython (http://www.activestate.com/)
> - - IDLE (http://www.python.org/idle/doc/idle2.html)
>
> and depending on how you define IDEs, you can also decide whether or not to
> include, the following
> - - emacs
> - - vim
> - - scite
> ...
>
> - --
> _ _ _]{5pitph!r3}[_ _ _
> __
> "I'm smart enough to know that I'm dumb."
> - Richard P Feynman
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> xQTmmDlDF5BAfiWkrSW3TuQ=
> =902n
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thanks buddy, I am now using ActivePython, actually it is beyond my
expectation:)
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verify whether "str" is still callable in Python 2.5.1
hi Group: Once use ActivePython latest version for Python 2.5.1. I happened to find function "str" is not callable, but it is available for Python 2.5. Can anybody give some comments about it? Any response is highly appreciated. Thanks Ge Chunyuan -- http://mail.python.org/mailman/listinfo/python-list
Re: verify whether "str" is still callable in Python 2.5.1
Ge Chunyuan wrote: > Once use ActivePython latest version for Python 2.5.1. > I happened to find function "str" is not callable, but it is available > for Python 2.5. If it's not callable it's not the str() function, but something else with a badly chosen variable name. >>> callable(str) True >>> str = "yadda" >>> callable(str) False Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: verify whether "str" is still callable in Python 2.5.1
On Aug 13, 4:48 pm, Peter Otten <[EMAIL PROTECTED]> wrote: > Ge Chunyuan wrote: > > Once use ActivePython latest version for Python 2.5.1. > > I happened to find function "str" is not callable, but it is available > > for Python 2.5. > > If it's not callable it's not the str() function, but something else with a > badly chosen variable name. > > >>> callable(str) > True > >>> str = "yadda" > >>> callable(str) > > False > > Peter oh, please forget my silly question. you are absolutely right. -- http://mail.python.org/mailman/listinfo/python-list
Re: verify whether "str" is still callable in Python 2.5.1
Ge Chunyuan <[EMAIL PROTECTED]> wrote: > Once use ActivePython latest version for Python 2.5.1. > I happened to find function "str" is not callable, but it is available > for Python 2.5. > Can anybody give some comments about it? I don't really understand what your asking. str is a callable, it has always been AFAIK, since it's a type constructor, like int() In [1]: callable(str) Out[1]: True In [2]: str() Out[2]: '' -- Lawrence, oluyede.org - neropercaso.it "It is difficult to get a man to understand something when his salary depends on not understanding it" - Upton Sinclair -- http://mail.python.org/mailman/listinfo/python-list
Re: wx.ListBox drag and drop
On Aug 12, 11:06 pm, ianaré <[EMAIL PROTECTED]> wrote: > Hey all, > > I see plenty of drag and drop examples but they are all for > wx.ListCtrl. Anyone know of examples or tutorials for wx.ListBox? > Specifically, I would like to be able to drag a selection from one > ListBox to another. > > Thanks in advance, > > - ianaré See if this helps: - import wx class MyFrame(wx.Frame): def __init__(self): wx.Frame.__init__(self, None, -1, "List Boxes") panel = wx.Panel(self, -1) choices1 = ["red", "green", "blue"] choices2 = ["10", "20", "30"] self.lb1 = wx.ListBox(panel, -1, (10, 10), (100, 200), choices1, wx.LB_SINGLE) self.lb1.Bind(wx.EVT_LISTBOX, self.on_select) lb2 = wx.ListBox(panel, -1, (120, 10), (100, 200), choices2, wx.LB_SINGLE) target = MyTextTarget(lb2) #MyTextTarget defined below lb2.SetDropTarget(target) def on_select(self, event): selection = self.lb1.GetSelection() text = self.lb1.GetStringSelection() text_obj = wx.TextDataObject(text) source = wx.DropSource(self.lb1) source.SetData(text_obj) drop_result = source.DoDragDrop(wx.Drag_DefaultMove) if drop_result == wx.DragMove: #the selection was moved-not copied self.lb1.Delete(selection) class MyTextTarget(wx.TextDropTarget): def __init__(self, target_widget): wx.TextDropTarget.__init__(self) self.target_widget = target_widget self.text_obj = wx.TextDataObject() self.SetDataObject(self.text_obj) def OnData(self, x, y, default): #called automatically on drop self.GetData() text = self.text_obj.GetText() end_of_list = self.target_widget.GetCount() self.target_widget.InsertItems([text], end_of_list) return default app = wx.PySimpleApp(redirect=False) win = MyFrame() win.Show() app.MainLoop() - The EVT_LISTBOX appears to be slightly broken on a mac. It doesn't fire if you click on a selection that is already selected. -- http://mail.python.org/mailman/listinfo/python-list
Adventure-Engines in Python
Are there any? I've set out to make an adventure game and now I'm trying to find a set of python-modules to help me do that. I know of the usual non-python suspects (AGAST, AGS, Wintermute, ...) and while I they are really good, I'd like one that is cross platform. I've found pyScumm and pyAdv but both don't seem to be ready for use yet. So are there any "usable" engines written in python? /W -- http://mail.python.org/mailman/listinfo/python-list
Re: retrieving ATOM/FSS feeds
_spitFIRE <[EMAIL PROTECTED]> wrote: > I'm using feedparser library to parser ATOM/RSS feeds. However, I don't > get the entire post! but only summaries! How do I retrieve the entire feed? > I believe that the parser library should have support for doing that or the > specification should detail how it can be done? Or should I simply get the > feed link and do HTML scraping? If the content producer doesn't provide the full article via RSS/ATOM there's no way you can get it from there. Search for full content feeds if any, otherwise get the article URL and feed it to BeautifulSoup to scrape the content. -- Lawrence, oluyede.org - neropercaso.it "It is difficult to get a man to understand something when his salary depends on not understanding it" - Upton Sinclair -- http://mail.python.org/mailman/listinfo/python-list
Eclipse/PyDev question
Hi, i am using Eclipse (Platform Runtime binary) with PyDev and i was wondering if someone can help me with this: 1. I set breakpoints to a .py file and i have told Eclipse to open the Debug perspective when it sees that some .py file(s) of my project indeed contains breakpoints. So, i press F9, Eclipse starts, Debug perspective opens and i can use the debugger just fine. But when the app terminates, how can i tell Eclipse to switch automatically to the PyDev perspective and not remain in the Debug one ? 2. Let's say we have a project that consists of some .py files. I want to press F9 when the editor displays anyone of these files but make Eclipse to run the whole project (that has another .py as "default") and not the script that i am currently working on, is that possible ?? Thanks a lot for any help -- http://mail.python.org/mailman/listinfo/python-list
check if var is dict
Hi, I have a variable, I want to check if it is a dictionary or a string. Is there any better way to do this than I've done. How I did it is by doing a .items() and catching a AttributeError that it raises if its not a dictionary. How do i properly do it? Thanks Astan -- http://mail.python.org/mailman/listinfo/python-list
Re: Complexity of methods etc
On Aug 13, 1:04 am, "Nathan Harmston" <[EMAIL PROTECTED]> wrote: > Hi, > > I was wondering if anyone knew of any resources, where I might be able > to find information about the complexity of certain python functions > or little tips on how to reduce complexity. I mean like the "".join(), > kind of thing? > > I want to see if there are any improvements I can add to my coding in > order to reduce time/space usage/ > > Many Thanks in advance > > Nathan I found the two Python Speed articles useful for demonstrating new ways to optimise code. Each is full of little tricks and tips on efficent ways of doing things. http://wiki.python.org/moin/PythonSpeed http://wiki.python.org/moin/PythonSpeed/PerformanceTips Dan -- http://mail.python.org/mailman/listinfo/python-list
Re: retrieving ATOM/FSS feeds
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Lawrence Oluyede wrote:
> If the content producer doesn't provide the full article via RSS/ATOM
> there's no way you can get it from there. Search for full content feeds
> if any, otherwise get the article URL and feed it to BeautifulSoup to
> scrape the content.
>
For the same feed (where the content producer doesn't provide the full
article!) I was able to see the complete post in other RSS aggregators (like
Blam). I wanted to know how they were able to collect the feed!
I knew for sure that you can't do screen scraping separately for each and
every blog and that there has be a standard way or atleast that blogs
maintain a standard template for rendering posts. I mean if each of the site
only offered partial content and the rest had to be scraped from the page,
and the page maintained a non-standard structure which is more likely, then
it would become impossible IMHO for any aggregator to aggregate feeds!
I shall for now try with BeautifulSoup, though I'm still doubtful about it.
- --
_ _ _]{5pitph!r3}[_ _ _
__
“I'm smart enough to know that I'm dumb.”
- Richard P Feynman
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yYzezvhJFY1SDHUGxrJdR5M=
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negative polar axis
hi! how can i do polar plot in python with negative axes that is the value of the magnitude is negative -- http://mail.python.org/mailman/listinfo/python-list
Re: Adventure-Engines in Python
Wildemar Wildenburger wrote: > Are there any? An adventure game was written for one of the PyWeek challenges: http://www.pyweek.org/e/aerunthar/ You might be able to use that as a starting point. Richard -- http://mail.python.org/mailman/listinfo/python-list
Re: retrieving ATOM/FSS feeds
_spitFIRE <[EMAIL PROTECTED]> wrote: > For the same feed (where the content producer doesn't provide the full > article!) I was able to see the complete post in other RSS aggregators (like > Blam). I wanted to know how they were able to collect the feed! Perhaps in the feed itself there's the link for the full content feed. -- Lawrence, oluyede.org - neropercaso.it "It is difficult to get a man to understand something when his salary depends on not understanding it" - Upton Sinclair -- http://mail.python.org/mailman/listinfo/python-list
Re: check if var is dict
Astan Chee <[EMAIL PROTECTED]> wrote:
> I have a variable, I want to check if it is a dictionary or a string.
> Is there any better way to do this than I've done. How I did it is by
> doing a .items() and catching a AttributeError that it raises if its not
> a dictionary.
> How do i properly do it?
One way is:
In [6]: isinstance(d, dict)
Out[6]: True
In [7]: isinstance("ciao", basestring)
Out[7]: True
This way you won't catch custom classes implementing dict or basestring
"protocols". In order to do that you can check if it implements the
right methods or treat the object as a dict or a string. It depends on
what you're trying to achieve.
--
Lawrence, oluyede.org - neropercaso.it
"It is difficult to get a man to understand
something when his salary depends on not
understanding it" - Upton Sinclair
--
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Re: Eclipse/PyDev question
On 8/13/07, king kikapu <[EMAIL PROTECTED]> wrote: > > Hi, > > i am using Eclipse (Platform Runtime binary) with PyDev and i was > wondering if someone can help me with this: > > 1. I set breakpoints to a .py file and i have told Eclipse to open the > Debug perspective when it sees that some .py file(s) of my project > indeed contains breakpoints. So, i press F9, Eclipse starts, Debug > perspective opens and i can use the debugger just fine. But when the > app terminates, how can i tell Eclipse to switch automatically to the > PyDev perspective and not remain in the Debug one ? There's no currently no automatic' way to do this (but you can use Ctrl+F8 to iterate your perspectives, Ctrl+F7 for your views and Ctrl+F6 for your editors, so, it should be easy to go to wherever you want in the interface). 2. Let's say we have a project that consists of some .py files. I want > to press F9 when the editor displays anyone of these files but make > Eclipse to run the whole project (that has another .py as "default") > and not the script that i am currently working on, is that possible ?? You should do F9 in you current editor and then Ctrl+F11 to re-run the last run -- so, if you have a main file that you just ran in your project, you can probably just keep to Ctrl+F11 -- note that this behavior changed with Eclipse 3.3, but you can restore it: window > preferences > run/debug > launching > always launch the previously launched application. Cheers, Fabio -- http://mail.python.org/mailman/listinfo/python-list
Re: Module imports during object instantiation
Ritesh Raj Sarraf wrote: > Hi, > > I've been very confused about why this doesn't work. I mean I don't see any > reason why this has been made not to work. > > class Log: > > def __init__(self, verbose, lock = None): > > if verbose is True: > self.VERBOSE = True > else: self.VERBOSE = False > Better: self.VERBOSE = verbose or, if you suspect verbose might pass in a mutable value, self.VERBOSE bool(verbose) > > if lock is None or lock != 1: > self.DispLock = False do you want to set self.lock here? IF so, a similar improvement could be made (though you would still need a test to create the lock object). > else: > self.DispLock = threading.Lock() > self.lock = True > > if os.name == 'posix': >self.platform = 'posix' >self.color = get_colors() > > elif os.name in ['nt', 'dos']: > self.platform = 'microsoft' > > try: > import SomeModule > except ImportError: > self.Set_Flag = None > > if self.Set_Flag is not None: > self.color = SomeModule.get_colors_windows() > > else: > self.platform = None > self.color = None > > When I create an object the "import" part never gets executed. Is there a > reason behind it ? > I mean I'd like to keep my class as independent as I want. So that when > later I need to use it somewhere else, I don't need to know if it depends > on any modules. > > Currently, the way I'm left is to globally go and import the module and set > a flag there. > What's leading you to conclude the import isn't being executed? You realise, I trust, that the module's code will only be executed on the first call to __init__()? You are right in assuming that __init__() is called once per instance created, and it's legitimate to make an import conditional in the way you have because of the "execute code only once" behavior - if the module is already in sys.modules then it won't be re-imported, the existing one will be used. Having said all that, I still don't see why you can't just put the try/except at the top level of your code and have color be a global. Why repeat the attempted import and the computation for each object you create? Alternatively, do it at the class level, so it's only executed once when the class is declared? regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden --- Asciimercial -- Get on the web: Blog, lens and tag the Internet Many services currently offer free registration --- Thank You for Reading - -- http://mail.python.org/mailman/listinfo/python-list
Re: check if var is dict
Astan Chee a écrit : > Hi, > I have a variable, I want to check if it is a dictionary or a string. > Is there any better way to do this than I've done. How I did it is by > doing a .items() and catching a AttributeError that it raises if its not > a dictionary. > How do i properly do it? Checking the presence of one (or more) attributes of the object is so far the best thing to do. Now wrt/ *how* to check, using hasattr() or getattr() might be better than a try/except block: def my_func(some_obj): if callable(getattr(obj, 'items', None)) \ and callable(getattr(obj, 'keys', None)): use_obj_as_a_dict(...) else: use_obj_as_a_string(...) Now keep in mind that this may lead to false positives if you don't carefully choose the attribute(s) to check the presence of... -- http://mail.python.org/mailman/listinfo/python-list
Re: Process Control Help
In article <[EMAIL PROTECTED]>, Azazello <[EMAIL PROTECTED]> wrote: >On Jul 31, 12:45 pm, Walt Leipold <[EMAIL PROTECTED]> wrote: . . . >> It has nothing to do with 'proprietary issues'. A lot of it has to do >> with the perception of support -- who will support Python and custom >> Python code if my plant shuts down? Who will train my developers and >> operators? Who can I sue? The rest of it is because of the way the . . . >> You *might* save on development time (although I wouldn't bet on it), >> but you'll lose on testing time. Heck, you'll even lose because you >> have to document your stuff and train people to use it -- what happens >> to your custom system if you get hit by a bus? . . . >> Yes, it's a shame that you have to buy three packages to perform three >> functions, and then buy other 3rd-party packages to tie them together. >> Yes, it's a shame that industrial software is expensive, and >> proprietary, and Windows-only, and generally has a brain-dead scripting >> language (when it has any scriptability at all). Still, as much as it >> galls me to say it, if your company's primary business isn't writing >> industrial automation software, don't write industrial automation >> software. . . . >> * Unless you're a hobbyist, if you want to do data acquisition or i/o, >> purchase an i/o server for your particular bus/instrumentation from a >> major manufacturer. You *can* write your own i/o server, especially for >> simple protocols like Modbus, but the commercial versions have been >> tested more exhaustively than you can manage. Also, the most common >> protocol these days is OPC, which isn't a protocol at all in the >> conventional sense -- it's a set of APIs to a Windows DLL, with the >> wire-level details completely opaque -- so you'd have to buy a library >> for that anyway. >> >> * Unless you're a hobbyist, if you want an HMI, purchase LabView or >> InTouch or RSView or whatever, and use their tools to draw and >> 'configure' your screens. (Where 'configure' generally means 'program >> in Visual Basic or some other brain-dead language', but we try not to >> say "program" -- customers and underwriters *hate* "custom" software.) >> >> I personally think it's a tragedy that every manufacturer bases its HMI >> on Visual Basic for Applications rather than a better (and free and Open >> Source!) language like Python. It's also a tragedy that the dominant >> i/o 'protocol' for industrial automation isn't really a protocol, and is >> Windows-only to boot. It's horrifying that the primary means of >> communication between process control and data acquisition applications >> is via DDE or ActiveX. And I find it incredible that people and >> companies will pay large sums of money for some of the industrial >> automation products on the market. But that's the way the industry >> works, and, as frustrating as the commercial offerings are, using them >> will probably be better for you and your company in the long run. . . . >I really appreciate your post Walt. I started this thread last week >and I have to admit that in the subsequent days the 'option' of using >Python for our control solutions is simply not feasible. Although the >project I wanted to implement was fairly small scale, no 20 ton pieces >or x-ray machinery, the principle of the matter remains the same, >especially as a large corporation. As an intern returning to school >in the fall, the underlying responsibility for a Python system was my >original concern and discouragement to my employer for persuing this >path. It became readily apparent that using the crumby software >packaged with our control devices is surely faster in the long run, as >we are not involved in software development. (The majority of my >coworkers' formal programming experience is in FORTRAN) It has been a >very discouraging few days. There's so much room for improvement and >yet... My 4-day conclusion is unless you're already involved in >controls software you must be crazy to join. Are many young engineers >entering this field? > At an anecdotal level, I'd guess that, no, there are few young engineers entering this field. Mr. Leipold's descriptions of the difficulties involved in use of Python are accurate, and I particularly support his advice to use whatever commercial I/O you can find. I've had success, though, introducing high-level language programming, and even Linux, as an alternative to vendors' APIs, Labview, and so on. I'm not sure how to summarize what went into this; perhaps the best is to emphasize how flawed is the software that's typical with vendor APIs. While there's more
Re: check if var is dict
You could use 'isinstance' to determine whether or not your object is
an instance of a particular class.
>>> isinstance({}, dict)
True
>>> isinstance("", basestring)
True
>>>
Note the use of 'basestring', which will catch unicode as well.
-Jeff
On 8/13/07, Astan Chee <[EMAIL PROTECTED]> wrote:
> Hi,
> I have a variable, I want to check if it is a dictionary or a string.
> Is there any better way to do this than I've done. How I did it is by
> doing a .items() and catching a AttributeError that it raises if its not
> a dictionary.
> How do i properly do it?
> Thanks
> Astan
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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Air conditioners for free!??!?!!!
http://airconlinks.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Process Control Help
In article <[EMAIL PROTECTED]>, <[EMAIL PROTECTED]> wrote: > > >I'm attempting to start some process control using Python. I've have . . . >Is there an existing forum on this already? . . . http://www.engcorp.com/acf/RecentChanges > It's been dormant for a while, but it wouldn't take much to restore its vitality. -- http://mail.python.org/mailman/listinfo/python-list
Re: decorators - more than just syntactic sugar
On 8/11/07, Helmut Jarausch <[EMAIL PROTECTED]> wrote: > How can I find out the predefined decorators? There are two in the standard library, @classmethod for declaring class methods and @staticmethod for declaring static methods. They are listed at the built ins page http://docs.python.org/dev/lib/built-in-funcs.html, unpedagogically not separated from ordinary functions. -- mvh Björn -- http://mail.python.org/mailman/listinfo/python-list
Configuring apache to execute python scripts using mod_python handler
I configured apache to execute python scripts using mod_python
handler. I followed below mentioned steps to configure apache.
1. In http.conf I added
AddHandler mod_python .py
PythonHandler mptest
PythonDebug On
2. Then I added the line "LoadModule python_module modules/
mod_python.so" to http.conf.
Then I tried execute the python script mentioned below from browser.
from mod_python import apache
def handler(req):
req.content_type = 'text/plain'
req.write("Hello World!")
return apache.OK
Then I am getting the following error
Traceback (most recent call last):
File "D:\softwares\Python25\Lib\site-packages\mod_python
\importer.py", line 1537, in HandlerDispatch
default=default_handler, arg=req, silent=hlist.silent)
File "D:\softwares\Python25\Lib\site-packages\mod_python
\importer.py", line 1202, in _process_target
module = import_module(module_name, path=path)
File "D:\softwares\Python25\Lib\site-packages\mod_python
\importer.py", line 304, in import_module
return __import__(module_name, {}, {}, ['*'])
ImportError: No module named mptest
I am using Apache 2.2.4, python 2.5 and mod_python-3.3.1.win32-py2.5-
Apache2.2.
I am able to execute python scripts by configuring apache to execute
the cgi scripts. But I want to execute it using mod_python as it is
faster compared to cgi mode. Someone please help me on this issue.
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Re: check if var is dict
Astan Chee wrote: > Hi, > I have a variable, I want to check if it is a dictionary or a string. > Is there any better way to do this than I've done. How I did it is by > doing a .items() and catching a AttributeError that it raises if its not > a dictionary. > How do i properly do it? > The way you did, actually :). Look for "It's better to ask for forgiveness than for permission" (or so) and the term "duck typing". That's the way to do it in python. And just for completeness' sake: You could have also checked for actual types via "isinstance(your_variable, dict) or "type(your_variable) is type(dict)" or ... But your approach is the recomended one. /W -- http://mail.python.org/mailman/listinfo/python-list
Re: decorators - more than just syntactic sugar
"BJörn Lindqvist" <[EMAIL PROTECTED]> wrote: > On 8/11/07, Helmut Jarausch <[EMAIL PROTECTED]> wrote: >> How can I find out the predefined decorators? > > There are two in the standard library, @classmethod for declaring > class methods and @staticmethod for declaring static methods. They are > listed at the built ins page > http://docs.python.org/dev/lib/built-in-funcs.html, unpedagogically > not separated from ordinary functions. > > There are at least two other decorators in the standard library: functools.wraps contextlib.contextmanager -- http://mail.python.org/mailman/listinfo/python-list
Re: Eclipse/PyDev question
On Aug 13, 11:48 am, king kikapu <[EMAIL PROTECTED]> wrote: > Hi, > > i am using Eclipse (Platform Runtime binary) with PyDev and i was > wondering if someone can help me with this: > > 1. I set breakpoints to a .py file and i have told Eclipse to open the > Debug perspective when it sees that some .py file(s) of my project > indeed contains breakpoints. So, i press F9, Eclipse starts, Debug > perspective opens and i can use the debugger just fine. But when the > app terminates, how can i tell Eclipse to switch automatically to the > PyDev perspective and not remain in the Debug one ? You don't, Eclipse keeps the same perspective because for what it knows you might want to debug some more and it correctly avoids to decide what is good for you. Switching to the debug perspective when you issue a debug command is an exception to the normal switching of perspectives with the respective big buttons and the menu. If you wish to switch perspective to edit code before debugging again, putting editors and appropriate accessory views in the debug perspective might be good enough. > 2. Let's say we have a project that consists of some .py files. I want > to press F9 when the editor displays anyone of these files but make > Eclipse to run the whole project (that has another .py as "default") > and not the script that i am currently working on, is that possible ?? Executing the current file is a bad habit, Eclipse remembers a list of execution/debug configurations that can be selected from a dropdown list in the toolbar and edited with a dialog box; after you setup entry points for a project you can use and edit them as needed. I'm using Eclipse for Java and my entry points include remote debugging of a GUI application, about 6 JUnit tests, about 3 command line tools with many complex parameter sets each, and some Ant builds; it would take about one hour of trial and error to reconstruct the command lines, classpaths and JVM options. I only run the current file as a draft for an edited configuration. Regards, Lorenzo Gatti -- http://mail.python.org/mailman/listinfo/python-list
Re: decorators - more than just syntactic sugar
Marc 'BlackJack' Rintsch <[EMAIL PROTECTED]> wrote: > On Sat, 11 Aug 2007 20:30:54 +0200, Helmut Jarausch wrote: > >> are decorators more than just syntactic sugar in python 2.x and what >> about python 3k ? > > They are just syntactic sugar. > > @spam > def ham(): > pass > > is the same as > > def ham(): > pass > > ham = spam(ham) Decorators are almost just syntactic sugar, but in fact there is a subtle difference between the two bits of code you gave: in the second one you assign the function to the name ham and then replace it with the result of calling spam. With the decorator syntax you only have one assignment to ham and when that decorator is called that assignment has not yet happened. The difference is small, but you can write decorators which depend on it. For example, the code I posted in <[EMAIL PROTECTED]> depends on this difference and will not work if you write the calls out explicitly instead of using decorators. -- http://mail.python.org/mailman/listinfo/python-list
Re: Configuring apache to execute python scripts using mod_python handler
Hi Joe
You'd probably have better luck posting this to the mod python mailing
list. Did you name your python script mptest.py and did you remember
to restart Apache when you edited the httpd.conf file? If so then I
don't see any reason why it shouldn't work although I've never tried
mod_python under a Windows environment.
Regards
Jeffrey van Aswegen
joe jacob wrote:
> I configured apache to execute python scripts using mod_python
> handler. I followed below mentioned steps to configure apache.
>
> 1. In http.conf I added
>
>
> AddHandler mod_python .py
> PythonHandler mptest
> PythonDebug On
>
>
> 2. Then I added the line "LoadModule python_module modules/
> mod_python.so" to http.conf.
>
> Then I tried execute the python script mentioned below from browser.
>
> from mod_python import apache
> def handler(req):
> req.content_type = 'text/plain'
> req.write("Hello World!")
> return apache.OK
>
> Then I am getting the following error
>
> Traceback (most recent call last):
>
> File "D:\softwares\Python25\Lib\site-packages\mod_python
> \importer.py", line 1537, in HandlerDispatch
> default=default_handler, arg=req, silent=hlist.silent)
>
> File "D:\softwares\Python25\Lib\site-packages\mod_python
> \importer.py", line 1202, in _process_target
> module = import_module(module_name, path=path)
>
> File "D:\softwares\Python25\Lib\site-packages\mod_python
> \importer.py", line 304, in import_module
> return __import__(module_name, {}, {}, ['*'])
>
> ImportError: No module named mptest
>
> I am using Apache 2.2.4, python 2.5 and mod_python-3.3.1.win32-py2.5-
> Apache2.2.
>
> I am able to execute python scripts by configuring apache to execute
> the cgi scripts. But I want to execute it using mod_python as it is
> faster compared to cgi mode. Someone please help me on this issue.
--
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Re: Air conditioners for free!??!?!!!
fritz wrote: > > http://goodgrief -- Paul (We won't die of devotion) --- Stop and Look http://www.geocities.com/dreamst8me/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Adventure-Engines in Python
On Mon Aug 13 11:33:14 CEST 2007, Wildemar Wildenburger wrote: > Are there any? > > I've set out to make an adventure game and now I'm trying to find a set > of python-modules to help me do that. I know of the usual non-python > suspects (AGAST, AGS, Wintermute, ...) and while I they are really good, > I'd like one that is cross platform. > > I've found pyScumm and pyAdv but both don't seem to be ready for use > yet. So are there any "usable" engines written in python? It's been a while since I looked at anything like this, but I seem to remember two Python powered engines: PAWS and PUB. http://py-universe.sourceforge.net/ http://members.nuvox.net/~zt.wolf/PAWS.htm If you want to write adventures with more graphics and less text, you could do worse than looking at existing projects and solutions written with Pygame: http://www.pygame.org/ David -- http://mail.python.org/mailman/listinfo/python-list
Python-URL! - weekly Python news and links (Aug 13)
QOTW: "The first time you see twenty tons of machinery move unexpectedly because you inadvertently changed one bit in memory, you become very conservative about your software platform." - Walt Leipold "Making use of the available wrappers for current Tk libraries such as BWidgets, Tile, Tablelist, TkTreeCtrl, and so on allows you to make UI's every bit as polished as what comes with wxPython ..." - Kevin Walzer Looking for the best programs written entirely in Python: http://groups.google.com/group/comp.lang.python/browse_thread/thread/9fea4deb4c70fef1/ `a==b` vs. `a is b` revisited, with some advice on when to use one test or another: http://groups.google.com/group/comp.lang.python/browse_thread/thread/4a087153826f1f2b/ Pros and cons of "desktop web" applications vs. native GUIs: http://groups.google.com/group/comp.lang.python/browse_thread/thread/1f823a9c8a41c8bb/50c2f4bc10621f9a?rnum=1#50c2f4bc10621f9a started as http://groups.google.com/group/comp.lang.python/browse_thread/thread/1f823a9c8a41c8bb When is OK to use __del__? http://groups.google.com/group/comp.lang.python/browse_thread/thread/b09e02b7c67c8a3b/ Leipzig is the site of the second "Python im deutschsprachigen Raum 2007". Among the presentations likely to reward both novices and experienced Pythoneers are ones on Web applications, use of Python in science, developer tools in Python, and Python for simulations in aerospace. http://www.python-academy.de/workshop/index.html Somewhat related to previous topic: how to ensure a generator object is closed in Python 2.4? http://groups.google.com/group/comp.lang.python/browse_thread/thread/3f789096bded17e7/ Discussing Python threading model, the GIL, Stackless, and possible future alternatives: http://groups.google.com/group/comp.lang.python/browse_thread/thread/bbeb8b826af93ae/ "Use spaces for space and use tabs for tables": A Python song, by James Stroud http://groups.google.com/group/comp.lang.python/msg/9743131cf0c426eb Everything Python-related you want is probably one or two clicks away in these pages: Python.org's Python Language Website is the traditional center of Pythonia http://www.python.org Notice especially the master FAQ http://www.python.org/doc/FAQ.html PythonWare complements the digest you're reading with the marvelous daily python url http://www.pythonware.com/daily Mygale is a news-gathering webcrawler that specializes in (new) World-Wide Web articles related to Python. http://www.awaretek.com/nowak/mygale.html While cosmetically similar, Mygale and the Daily Python-URL are utterly different in their technologies and generally in their results. Just beginning with Python? This page is a great place to start: http://wiki.python.org/moin/BeginnersGuide/Programmers The Python Papers aims to publish "the efforts of Python enthusiats": http://pythonpapers.org/ The Python Magazine is a technical monthly devoted to Python: http://pythonmagazine.com Readers have recommended the "Planet" sites: http://planetpython.org http://planet.python.org comp.lang.python.announce announces new Python software. Be sure to scan this newsgroup weekly. http://groups.google.com/groups?oi=djq&as_ugroup=comp.lang.python.announce Python411 indexes "podcasts ... to help people learn Python ..." Updates appear more-than-weekly: http://www.awaretek.com/python/index.html Steve Bethard continues the marvelous tradition early borne by Andrew Kuchling, Michael Hudson, Brett Cannon, Tony Meyer, and Tim Lesher of intelligently summarizing action on the python-dev mailing list once every other week. http://www.python.org/dev/summary/ The Python Package Index catalogues packages. http://www.python.org/pypi/ The somewhat older Vaults of Parnassus ambitiously collects references to all sorts of Python resources. http://www.vex.net/~x/parnassus/ Much of Python's real work takes place on Special-Interest Group mailing lists http://www.python.org/sigs/ Python Success Stories--from air-traffic control to on-line match-making--can inspire you or decision-makers to whom you're subject with a vision of what the language makes practical. http://www.pythonology.com/success The Python Software Foundation (PSF) has replaced the Python Consortium as an independent nexus of activity. It has official responsibility for Python's development and maintenance. http://www.python.org/psf/ Among the ways you can support PSF is with a donation. h
Re: Eclipse/PyDev question
On Aug 13, 1:44 pm, [EMAIL PROTECTED] wrote: > On Aug 13, 11:48 am, king kikapu <[EMAIL PROTECTED]> wrote: > > > Hi, > > > i am using Eclipse (Platform Runtime binary) with PyDev and i was > > wondering if someone can help me with this: > > > 1. I set breakpoints to a .py file and i have told Eclipse to open the > > Debug perspective when it sees that some .py file(s) of my project > > indeed contains breakpoints. So, i press F9, Eclipse starts, Debug > > perspective opens and i can use the debugger just fine. But when the > > app terminates, how can i tell Eclipse to switch automatically to the > > PyDev perspective and not remain in the Debug one ? > > You don't, Eclipse keeps the same perspective because for what it > knows you might want to debug some more and it correctly avoids to > decide what is good for you. Switching to the debug perspective when > you issue a debug command is an exception to the normal switching of > perspectives with the respective big buttons and the menu. > If you wish to switch perspective to edit code before debugging again, > putting editors and appropriate accessory views in the debug > perspective might be good enough. > > > 2. Let's say we have a project that consists of some .py files. I want > > to press F9 when the editor displays anyone of these files but make > > Eclipse to run the whole project (that has another .py as "default") > > and not the script that i am currently working on, is that possible ?? > > Executing the current file is a bad habit, Eclipse remembers a list of > execution/debug configurations that can be selected from a dropdown > list in the toolbar and edited with a dialog box; after you setup > entry points for a project you can use and edit them as needed. > I'm using Eclipse for Java and my entry points include remote > debugging of a GUI application, about 6 JUnit tests, about 3 command > line tools with many complex parameter sets each, and some Ant builds; > it would take about one hour of trial and error to reconstruct the > command lines, classpaths and JVM options. I only run the current file > as a draft for an edited configuration. > > Regards, > Lorenzo Gatti Hey Lorenzo, thanks for the help! I understood that with the Debug perspective. Ok, i will, as currently, have to swtick manually to PyDev. But i cannot figgre out how i can tell Eclipse to run the whole Project and not the currently active script that i work on... -- http://mail.python.org/mailman/listinfo/python-list
Re: Fatest standard way to sum bytes (and their squares)?
Erik Max Francis <[EMAIL PROTECTED]> writes: > Hrvoje Niksic wrote: > >> For ordinalSum, using imap is almost twice as fast: >> $ python -m timeit -s 'data=[chr(x) for x in xrange(256)]' >> 'sum(ord(x) for x in data)' >> 1 loops, best of 3: 92.4 usec per loop >> $ python -m timeit -s 'data=[chr(x) for x in xrange(256)]; from itertools >> import imap' 'sum(imap(ord, data))' >> 1 loops, best of 3: 55.4 usec per loop > > You're using data which is a list of chars (strings), rather than a > string itself, which is what the format is in. The imap > optimization doesn't appear to work quite as dramatically well for > me with strings instead of lists, but it certainly is an > improvement. I wouldn't expect to see any difference in strings and lists. In this simple test I get approximately the same ~1.7x speedup: $ python -m timeit 'sum(ord(x) for x in "abcdefghijklmnopqrstuvwxyz")' 10 loops, best of 3: 12.7 usec per loop $ python -m timeit -s 'from itertools import imap' 'sum(imap(ord, "abcdefghijklmnopqrstuvwxyz"))' 10 loops, best of 3: 7.42 usec per loop -- http://mail.python.org/mailman/listinfo/python-list
Re: Extending logging module
On Aug 9, 9:08 pm, jay <[EMAIL PROTECTED]> wrote: > It actually worked, but this is not the way I would like to handle the > problem. I would prefer to extend the classes instead. However, I'm > not too familiar with that, and I had to change things in so many > places, I'm wondering if its even possible? I don't like changing the > standard libraries, what happens if I have to upgrade python? My > changes get overwritten. > > Can anyone offer some help or suggestions? Thanks > Where's the difficulty in extending the SyslogHandler class? Simply override the methods you need to provide the behaviour you want, then use your handler instead of the standard SyslogHandler. I'm travelling at the moment and cannot post a working example, but it should be easy enough to do. It's just the same as extending any other Python class - but remember to call the base class's __init__ from your own __init__, if you provide one. Best regards, Vinay Sajip -- http://mail.python.org/mailman/listinfo/python-list
Re: Adventure-Engines in Python
On 13 aug 2007, at 11.33, Wildemar Wildenburger wrote: > Are there any? > > I've set out to make an adventure game and now I'm trying to find a > set > of python-modules to help me do that. I know of the usual non-python > suspects (AGAST, AGS, Wintermute, ...) and while I they are really > good, > I'd like one that is cross platform. > > I've found pyScumm and pyAdv but both don't seem to be ready for use > yet. So are there any "usable" engines written in python? > > /W > -- > http://mail.python.org/mailman/listinfo/python-list I don't know of any adventure engines in Python, bet there is an open-source language and class library for text adventures called TADS (www.tads.org) The syntax is similar to C++ and Java. Tads have been ported to ALL major platforms - This sig is dedicated to the advancement of Nuclear Power Tommy Nordgren [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Adventure-Engines in Python
On 2007-08-13, Richard Jones <[EMAIL PROTECTED]> wrote: > Wildemar Wildenburger wrote: >> Are there any? > > An adventure game was written for one of the PyWeek challenges: > > http://www.pyweek.org/e/aerunthar/ > > You might be able to use that as a starting point. Here's an abondoned (since Python 2.2), but basically complete system: http://members.nuvox.net/~zt.wolf/PAWS.htm For a taste of what it looked like, see the PAWS section of Roger Firth's IF system comparison page, _Cloak of Darkness_. http://www.firthworks.com/roger/cloak/ http://www.firthworks.com/roger/cloak/paws/index.html This contains a P.A.W.S version of the very simple example game. The author of the example is somewhat suspect, however. As far as I know, no full game was ever written in PAWS. Once you try it, you'll possibly see why no interactive fiction system distributed as a library for a general-purpose language has ever caught on. Every system that's enjoyed even moderate success has been a language+library implementation. -- Neil Cerutti -- http://mail.python.org/mailman/listinfo/python-list
Re: Colored text
On 2007-08-13, Michael Bentley <[EMAIL PROTECTED]> wrote: > > On Aug 12, 2007, at 7:05 PM, Rohan wrote: >> Can some one tell me how do I get colored text. Say when I want to >> write something in a text file , how do I get it colored. > > You can use ANSI escape codes -- http://en.wikipedia.org/wiki/ > ANSI_escape_code: Unfortunately, most versions of Windows of the last 7 years (2000, XP, probably Vista) don't support ANSI escape codes well enough to work with Python. -- Neil Cerutti We have to play hard for the full 40 minutes. 48? Oh, that's right. --Mikki Moore -- http://mail.python.org/mailman/listinfo/python-list
Re: retrieving ATOM/FSS feeds
_spitFIRE wrote: > -BEGIN PGP SIGNED MESSAGE- > Hash: SHA1 > > Lawrence Oluyede wrote: >> If the content producer doesn't provide the full article via RSS/ATOM >> there's no way you can get it from there. Search for full content feeds >> if any, otherwise get the article URL and feed it to BeautifulSoup to >> scrape the content. >> > > For the same feed (where the content producer doesn't provide the full > article!) I was able to see the complete post in other RSS aggregators > (like Blam). I wanted to know how they were able to collect the feed! Either it is referred to in the data - or it might be that they do have affiliate-deals with certain partners. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Eclipse/PyDev question
Ah, i forgot another one: as any project evolves, you need to organize it in directories. So, i have a project named "Dev" and Eclipse has provided me (in Navigator) with "Dev" and "Src". Inside Src i put my .py files. Let's say that i want to create a directory there (will i make it in "Src" or in "Dev") to put other .py files. I tried adding a "Folder", i also tried to add a "Pydev Source Folder", either way i cannot refer to these files from a .py located in Src directory with the usual "from folderA import"...It does not understand the folder structure and i am pretty sure i am missing something obvious here... -- http://mail.python.org/mailman/listinfo/python-list
Re: Something in the function tutorial confused me.
On 2007-08-12, Alex Martelli <[EMAIL PROTECTED]> wrote:
> Neil Cerutti <[EMAIL PROTECTED]> wrote:
>...
>> OK, I've thought about this some more and I think the source
>> of my confusion was I thought assignment in Python meant
>> binding a name to something, not mutating an object. But in
>> the case of augmented assignment, assignment no longer means
>> that?
>
> "Plain" assignment *to a plain name* does mean "binding a name"
> (the LHS) to "something" (the RHS).
>
> Other assignments (ones that are not "plain" assignments to
> names) may have different meanings. For example:
>
class act(object):
> ... def __init__(self, c): self._c = c
> ... def getC(self): return self._c
> ... def setC(self, *ignore): self._c += 1
> ... c = property(getC, setC)
> ...
x = act(0)
x.c
> 0
x.c = 23
x.c
> 1
>
> Here's an example where a plain assignment (to an attribute of x, not to
> a plain name) obviously DOESN'T mean "binding a name to something": the
> "something" (the RHS) is completely ignored, so the plain assignment is
> mutating an object (x) and not binding any name to anything.
That's enlightening. I hadn't considered the implications of
generalizing assignment to names with assignment to qualified
names.
> Plain assignments to items and slices can also often be best
> seen as "mutating an object" (the one being indexed or sliced
> on the LHS) rather than "binding a name". For example:
>
l=list('ciao')
l[1:3]='app'
l
> ['c', 'a', 'p', 'p', 'o']
That example makes me feel ashamed for not thinking of it, since
I use the slicing assignment all the time and it's "obviously"
not a binding construct.
> If I was teaching Python and came upon this example, I would
> definitely not try to weaselword the explanation of what's
> going on in terms of "binding a name" (or several ``names'',
> including ``rebinding" a new ``name'' l[4] to the 'o' that was
> previously ``bound'' to l[3], etc:-): it's just orders of
> magnitudes simpler to explain this as "mutating an object",
> namely the list
>
> I take almost 3 pages in "Python in a Nutshell" (47 to 49 in
> the second edition) to summarily explain every kind assignment
> -- and that's in a work in which I've tried (successfully, I
> believe from reviews) to be very, *VERY* concise;-).
>
> Summarizing that summary;-), a plain assignment to an identifier binds
> that name; a plain assignment to an attribute reference x.y asks object
> x (x can be any expression) to bind its attribute named 'y'; a plain
> assignment to an indexing x[y] (x and y are arbitrary expressions) asks
> object x to bind its item indicated by the value of y); a plain
> assignment to a slicing is equivalent to the plain assignment to the
> indexing with an index of slice(start, stop, stride) [[slice is a Python
> builtin type]].
>
> Plain assignment to an identifier "just happens"; all other cases of
> plain assignment are requests to an object to bind one or more of its
> attributes or items (i.e., requests for specific mutations of an object)
> -- as for, say any method call (which might also be a request for some
> kind of mutation), the object will do whatever it pleases with the
> request (including, perhaps, "refusing" it, by raising an exception).
>
> Then we get into unpacking assignments and augmented
> assignments, but I don't really want to write two more pages
> worth of summary...;-).
Thanks very much for taking the time to help clear up my
erroneous model of assignment in Python. I'd taken a conceptual
shortcut that's not justified.
--
Neil Cerutti
--
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Drawing a graph
Hello list, I need to draw a graph, 2 axes, 2D, nothing fancy. One of the axes is time, the other one is a series of integers. I don't care much about the output format. Are there any specialized libraries for this, or should i use PIL? Thanks. -- Regards, Ghirai. -- http://mail.python.org/mailman/listinfo/python-list
strftime in python 2.2
I'm trying to make work this code in python 2.2.3:
check=datetime.datetime.today().strftime("%H%M")
but datetime is not supported in that version but just in the later.
I can't upgrade python, too many dependencies in a critical system.
How can i convert that string to have the same result?
Hope someone can help me,
Thanks in advance
--
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Re: check if var is dict
Jeff McNeil a écrit :
(top-post corrected)
> On 8/13/07, Astan Chee <[EMAIL PROTECTED]> wrote:
>> Hi,
>> I have a variable, I want to check if it is a dictionary or a string.
>> Is there any better way to do this than I've done. How I did it is by
>> doing a .items() and catching a AttributeError that it raises if its not
>> a dictionary.
>> How do i properly do it?
>> Thanks
> You could use 'isinstance' to determine whether or not your object is
> an instance of a particular class.
>
isinstance({}, dict)
> True
isinstance("", basestring)
> True
>
> Note the use of 'basestring', which will catch unicode as well.
>
The problem is that it will prevent passing some perfectly valid objects
(in this case, mostly dict-like objects, and there are quite a lot of
dict-like objects in existing Python code).
--
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Re: negative polar axis
yadin wrote: > hi! > how can i do polar plot in python with negative axes > that is the value of the magnitude is negative > Surely a negative magnitude doesn't make sense in polar coordinates, since the magnitude is supposed to represent the distance from the center. About the best interpretation I can think of is to add 180 degrees to the angle and reverse the sign of the magnitude, but this would be a hack. Where are those coordinates coming from? regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden --- Asciimercial -- Get on the web: Blog, lens and tag the Internet Many services currently offer free registration --- Thank You for Reading - -- http://mail.python.org/mailman/listinfo/python-list
Re: Pausing and Unpausing Threads
On Aug 13, 2:31 am, "Gabriel Genellina" <[EMAIL PROTECTED]> wrote: > Use the same Queue; put a special kind of Action, or just a None object, > to tell the thread that there are no more things to process. > From the main thread, you can join() the others, waiting for them to > finish. Ah, thank you very much. :) - Aaron J. M. -- http://mail.python.org/mailman/listinfo/python-list
Getting started with JPype
Hi,
For nefarious javaesque reasons I've been trying to get started with
jpype (http://jpype.sourceforge.net). This looks like a potentially
useful tool for integrating java classes into C-python, but
frustratingly I've run into immediate problems. The documentation on
the project really doesn't deal with 'the basics' and I believe it is
this that I am running foul of: I have read much on the web, and I
suspect that this is a classpath issue, but I can't see what I'm doing
wrong.
And I'm confident that the path I specify is ok
The error I get is
"Package myclass.HelloWorld is not Callable"
but I suspect that this is, infact, telling me that the class
HelloWorld could not be found.
If so - why not? - Note that using java
Here's my python code snippet
from jpype import *
startJVM(getDefaultJVMPath(), "-ea", "-Djava.class.path=D:/tmp/jpype-
reli/test/dist/test.jar'' )
package = JPackage("myclass")
x = package.HelloWorld()
x.do_a_message()
shutdownJVM()
I have a java class called HelloWorld in package "myclass" which
resides in test.jar. The source is below:
package myclasses;
public class HelloWorld
{
/** Creates a new instance of HelloWorld */
public HelloWorld()
{
}
public void message()
{
System.out.println("Hello, World");
}
public static void do_a_message()
{
System.out.println("Static Hello, World");
}
}
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Re: Drawing a graph
Ghirai wrote: > Hello list, > > I need to draw a graph, 2 axes, 2D, nothing fancy. > One of the axes is time, the other one is a series of integers. > > I don't care much about the output format. > > Are there any specialized libraries for this, or should i use PIL? > What about Gnuplot.py http://gnuplot-py.sourceforge.net/ -- Helmut Jarausch Lehrstuhl fuer Numerische Mathematik RWTH - Aachen University D 52056 Aachen, Germany -- http://mail.python.org/mailman/listinfo/python-list
Re: Getting started with JPype
Gah - I hate it when that happens: Just after posting I figured out my
silly mistake: my package is called myclasses and I was referencing
'myclass'
apologies for wasting your time
> Hi,
>
> For nefarious javaesque reasons I've been trying to get started with
> jpype (http://jpype.sourceforge.net). This looks like a potentially
> useful tool for integrating java classes into C-python, but
> frustratingly I've run into immediate problems. The documentation on
> the project really doesn't deal with 'the basics' and I believe it is
> this that I am running foul of: I have read much on the web, and I
> suspect that this is a classpath issue, but I can't see what I'm doing
> wrong.
>
> And I'm confident that the path I specify is ok
>
> The error I get is
>
> "Package myclass.HelloWorld is not Callable"
>
> but I suspect that this is, infact, telling me that the class
> HelloWorld could not be found.
>
> If so - why not? - Note that using java
>
> Here's my python code snippet
>
> from jpype import *
>
> startJVM(getDefaultJVMPath(), "-ea", "-Djava.class.path=D:/tmp/jpype-
> reli/test/dist/test.jar'' )
>
> package = JPackage("myclass")
> x = package.HelloWorld()
> x.do_a_message()
>
> shutdownJVM()
>
> I have a java class called HelloWorld in package "myclass" which
> resides in test.jar. The source is below:
>
> package myclasses;
>
> public class HelloWorld
> {
>
> /** Creates a new instance of HelloWorld */
> public HelloWorld()
> {
> }
>
> public void message()
> {
> System.out.println("Hello, World");
> }
>
> public static void do_a_message()
> {
> System.out.println("Static Hello, World");
> }
>
> }
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Re: Drawing a graph
Ghirai wrote: > Hello list, > > I need to draw a graph, 2 axes, 2D, nothing fancy. > One of the axes is time, the other one is a series of integers. > > I don't care much about the output format. > > Are there any specialized libraries for this, or should i use PIL? > > Thanks. > ReportLab graphics works for me. www.reportlab.org -Larry -- http://mail.python.org/mailman/listinfo/python-list
Re: Binary, Hex, and Decimal string conversions
Just curious Dick, why are you making your own to_base method? Doesn't the source I provided in my earlier email give you all that you need? I was hoping my source might be useful to a few people, even though it's pretty trivial code. On 8/12/07, Dick Moores <[EMAIL PROTECTED]> wrote: > > At 07:04 PM 8/12/2007, Michael Bentley wrote: > > >On Aug 12, 2007, at 6:28 PM, Dick Moores wrote: > > > >>n = 12 > >>base = 36 > >>print to_base(n, base) > >>== > >>This seems to work fine for n >= base, but not for n < base. For > >>example, the code shown returns "c". Is my indentation wrong, or > >>the code? It seems to me that the code should work for the general > >>case, not just for n >= base. > > > >Isn't 'c' the correct answer? > > Yes, of course. Stupid of me. > > Dick > > > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
Re: Database intensive application
On Aug 12, 2007, at 7:44 AM, Viewer T. wrote: > and Yes, Python > has awesome database support and can satisfy almost all database > needs. Wow. Nobody ever told me Python was *that* kind of language :) Erik Jones Software Developer | Emma® [EMAIL PROTECTED] 800.595.4401 or 615.292.5888 615.292.0777 (fax) Emma helps organizations everywhere communicate & market in style. Visit us online at http://www.myemma.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Something in the function tutorial confused me.
Neil Cerutti <[EMAIL PROTECTED]> wrote: ... > > Then we get into unpacking assignments and augmented > > assignments, but I don't really want to write two more pages > > worth of summary...;-). > > Thanks very much for taking the time to help clear up my > erroneous model of assignment in Python. I'd taken a conceptual > shortcut that's not justified. You're very welcome, it's always a pleasure to help! Alex -- http://mail.python.org/mailman/listinfo/python-list
Help with optimisation
Hello,
I know this might be a little cheeky, and if it is, please say, but I need a
little hand optimising some code. For the simple reason that this is
'company' code and I have no idea what I'm allowed to release and not as the
case may be I've changed anything that could give an indication of the
company - if that makes any sense...
for the code below:
text_buffer is a single record from an XML stream. I can't read in the
entire XML at once because it isn't all available straight away, so I
capture line by line, and when a full message is available I use parseString
under the minidom API.
The SQL version is SQLite. It was recommended to me, and is adequate for the
uses I put it to.
The function doesn't return anything, but it's called often enough and
depending on the optimisation I'll be able to use the same style in other
areas of the program.
previous code:
def CreatePerson(text_buffer):
dom=xml.dom.minidom.parseString(text_buffer)
reflist = dom.getElementsByTagName('Country')
Country = reflist[0].firstChild.nodeValue
reflist = dom.getElementsByTagName('Age')
Age = reflist[0].firstChild.nodeValue
reflist = dom.getElementsByTagName('Surname')
Surname = reflist[0].firstChild.nodeValue
reflist = dom.getElementsByTagName('Forename')
Forename = reflist[0].firstChild.nodeValue
cursor.execute('INSERT INTO Person VALUES(?,?,?)', (Forename + "-" +
Surname, Age, Country))
connection.commit()
I've changed it now to this:
def CreatePerson(text_buffer):
dom=xml.dom.minidom.parseString(text_buffer)
elements=['Country','Age','Surname','Forename']
Values=[]
for element in elements:
reflist=dom.getElementsByTagName(element)
Values.append(reflist[0].firstChild.nodeValue)
# I can get away with the above because I know the structure of the
XML
cursor.execute('INSERT INTO Person
VALUES(?,?,?)',(Forename+"-"+Surname,Age,Country))
connection.commit()
They both seem ugly IMO (read: longer than intuitively necessary), and so I
was wondering whether there was any way to combine Forename and Surname
together within the Values list (think merge cells with the '-' in between)
so I could use the unary(?) operator within the SQL?
I suppose if this is a cheeky request then I won't get any replies.
Thank you for any help
Dominic
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Re: Car Air Conditioners
On Aug 13, 1:18 am, Lepi Duja <[EMAIL PROTECTED]> wrote: > All the informations about car air conditioners can be found on this > website... > > http://car-air-conditioning.blogspot.com/ -- http://mail.python.org/mailman/listinfo/python-list
Dictionary viewer and editor
http://mail.python.org/pipermail/python-list/2001-August/100288.html Did you ever finish writing this? -- <>0<>0<>0<>0<>0<>0<>0<>0<>0<>0 Ariel Balter Swain Hall West 025 Department of Physics Indiana University, Bloomington 737 E Third Street, 47404 [EMAIL PROTECTED] Office: (812) 855-2441 Home: (812) 332-2721 -- http://mail.python.org/mailman/listinfo/python-list
Re: Adventure-Engines in Python
Wildemar Wildenburger wrote: > I've set out to make an adventure game and now I'm trying to find a set > of python-modules to help me do that. I know of the usual non-python > suspects (AGAST, AGS, Wintermute, ...) and while I they are really good, > I'd like one that is cross platform. > OK, thanks. I should, of course, have been more specific. By saying "adventure" I mean the graphical variant (say, Monkey Island or Broken Sword), preferably but not necessarily in 2D. I've also found vidaG, but it seems dead as well. I'll keep looking but if you know something, please let me know. /W -- http://mail.python.org/mailman/listinfo/python-list
Re: Help with optimisation
special_dragonfly <[EMAIL PROTECTED]> wrote: ... > dom=xml.dom.minidom.parseString(text_buffer) If you need to optimize code that parses XML, use ElementTree (some other parsers are also fast, but minidom ISN'T). Alex -- http://mail.python.org/mailman/listinfo/python-list
Re: Mixing Python and C threads
Aahz pythoncraft.com> writes: > > In article python.org>, > =?utf-8?b?U3TDqXBoYW5l?= Larouche polymtl.ca> wrote: > >Aahz pythoncraft.com> writes: > >> > >> Can you reproduce your problem with stub code that only creates threads? > >> If yes, that indicates that you're messing with a thread structure > >> somewhere. Note that because you're using gcc, it's possible there's a > >> thread bug on Windows with your tool chain. You might want to check for > >> bug reports. > > > >Here's the simplest piece of code I could think of to reproduce the problem: > > Good work. This is about as far as my expertise can take you; if nobody > responds, you might try the new C/API mailing list (capi-sig). If anybody followed this thread, you'll be pleased to know that the mingw gcc 4.2.1 "technology preview" release available from the official mingw website and Python threads interact perfectly well together. You also have to pass the -mthread option to the linker. Sincerely, Stéphane -- http://mail.python.org/mailman/listinfo/python-list
Re: strftime in python 2.2
"Flyzone"schrieb
> I'm trying to make work this code in python 2.2.3:
>
> check=datetime.datetime.today().strftime("%H%M")
>
> but datetime is not supported in that version but
> just in the later. I can't upgrade python, too many
> dependencies in a critical system.
> How can i convert that string to have the same result?
>
import time
time.strftime("%H%M)
HTH
Martin
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Re: Fatest standard way to sum bytes (and their squares)?
Erik Max Francis <[EMAIL PROTECTED]> writes: > Alexander Schmolck wrote: > >> Is this any faster? >> >> ordSum, orsSumSq = (lambda c:c.real,c.imag)(sum(complex(ord(x),ord(x)<<1) >> for x in data)) > > That's pretty clever, but I neglected to mention that I need to accumulate the > sums as ints/longs to avoid losing precision, so converting to floating point > isn't an optional. I think you can safely use this trick (provided it really makes things faster) provided you sum blocks no larger than 2**(53-8) bytes; if your files are really that big you'd certainly want to split summing into several blocks anyway, because otherwise you'll be doing *lots* of extra bignum arithmetic instead of int32/int64 addition (I'd assume this will slow things noticably down even in python). Another trick you could try, again using table-lookup: work on words (i.e. 2bytes) instead of single bytes again using a table (from word->(byte-sum,sq-byte-sum) tuples) ; this will half the function calls and the table size of is hopefully still small enough to not to ruin your cache-hit rate (you might want to try array). 'as -- http://mail.python.org/mailman/listinfo/python-list
Re: Dictionary viewer and editor
On Aug 13, 7:09 pm, Ariel Balter <[EMAIL PROTECTED]> wrote: > http://mail.python.org/pipermail/python-list/2001-August/100288.html > > Did you ever finish writing this? > > -- > <>0<>0<>0<>0<>0<>0<>0<>0<>0<>0 > > Ariel Balter > > Swain Hall West 025 > Department of Physics > Indiana University, Bloomington > 737 E Third Street, 47404 > > [EMAIL PROTECTED] > > Office: (812) 855-2441 > Home: (812) 332-2721 There is this (untried): http://home.gna.org/oomadness/en/editobj/index.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Drawing a graph
On 12 Sie, 21:09, Ghirai <[EMAIL PROTECTED]> wrote: > Hello list, > > I need to draw a graph, 2 axes, 2D, nothing fancy. > One of the axes is time, the other one is a series of integers. > > I don't care much about the output format. > > Are there any specialized libraries for this, or should i use PIL? > > Thanks. > > -- > Regards, > Ghirai. Matplotlib (http://matplotlib.sourceforge.net/) Cheers, Marek -- http://mail.python.org/mailman/listinfo/python-list
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Re: ANN: Compyler 0.1
> Grant Olson wrote: > > Compyler is a pre-alpha x86 native code compiler. > > In what ways is this similar or different to Shed > Skin?http://mark.dufour.googlepages.com/ > > --Irmen I've never actually downloaded shedskin, but my understanding is that it: + does type inference for speed, but means you're working with a subset of python. + Generates C++ so you need an intermediate compiler (probably only an issue on windows) + Generates code via the AST. OTOH, compyler: + has the exact same semantics as compiler code. I was more concerned with this than performance payoffs. + generates .COFF files that are ready for linking. + Skips syntax tree processing and just assumes the default bytecode is a good enough starting point. I was going to say you couldn't make a .pyd in ShedSkin, but it looks like you can do that too. -Grant -- http://mail.python.org/mailman/listinfo/python-list
Re: ANN: Compyler 0.1
> > + has the exact same semantics as compiler code. I was more > This "should read exact same semantics as python code" -- http://mail.python.org/mailman/listinfo/python-list
Re: Eclipse/PyDev question
On 8/13/07, king kikapu <[EMAIL PROTECTED]> wrote: > > Ah, i forgot another one: > > as any project evolves, you need to organize it in directories. So, i > have a project named "Dev" and Eclipse has provided me (in Navigator) > with "Dev" and "Src". Inside Src i put my .py files. Let's say that i > want to create a directory there (will i make it in "Src" or in "Dev") > to put other .py files. I tried adding a "Folder", i also tried to add > a "Pydev Source Folder", either way i cannot refer to these files from > a .py located in Src directory with the usual "from folderA > import"...It does not understand the folder structure and i am pretty > sure i am missing something obvious here... > You have to set as source folders the exact same folders you'd usually put into your pythonpath (that's one level before the module you're going to import). Details on how to do that can be found at: http://fabioz.com/pydev/manual_101_root.html Cheers, Fabio -- http://mail.python.org/mailman/listinfo/python-list
Re: Help with optimisation
special_dragonfly a écrit :
> Hello,
(snip)
> The function doesn't return anything, but it's called often enough and
> depending on the optimisation I'll be able to use the same style in other
> areas of the program.
>
> previous code:
> def CreatePerson(text_buffer):
> dom=xml.dom.minidom.parseString(text_buffer)
> reflist = dom.getElementsByTagName('Country')
> Country = reflist[0].firstChild.nodeValue
> reflist = dom.getElementsByTagName('Age')
> Age = reflist[0].firstChild.nodeValue
> reflist = dom.getElementsByTagName('Surname')
> Surname = reflist[0].firstChild.nodeValue
> reflist = dom.getElementsByTagName('Forename')
> Forename = reflist[0].firstChild.nodeValue
> cursor.execute('INSERT INTO Person VALUES(?,?,?)', (Forename + "-" +
> Surname, Age, Country))
> connection.commit()
>
> I've changed it now to this:
> def CreatePerson(text_buffer):
> dom=xml.dom.minidom.parseString(text_buffer)
> elements=['Country','Age','Surname','Forename']
> Values=[]
> for element in elements:
> reflist=dom.getElementsByTagName(element)
> Values.append(reflist[0].firstChild.nodeValue)
> # I can get away with the above because I know the structure of the
> XML
> cursor.execute('INSERT INTO Person
> VALUES(?,?,?)',(Forename+"-"+Surname,Age,Country))
> connection.commit()
A common python optimisation trick is to stote local references to save
on attribute lookup time, ie:
# local ref to parseString
import dom
dom_parseString=xml.dom.minidom.parseString
def CreatePerson(text_buffer):
dom = dom_parseString(text_buffer)
elements=['Country','Age','Surname','Forename']
values=[]
getElementByTagName = dom.getElementsByTagName
for element in elements:
reflist = getElementsByTagName(element)
values.append(reflist[0].firstChild.nodeValue)
But as Alex already pointed out, you'd be better using (c)ElementTree.
> They both seem ugly IMO (read: longer than intuitively necessary),
I'd say this is a common problem with XML :-/
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Re: is there anybody using __del__ correctly??
Michele Simionato wrote: > SPECIALMETHODS = ['__%s__' % name for name in > ''' > abs add and call concat contains delitem delslice div eq floordiv ge > getitem > getslice gt iadd iand iconcat idiv ifloordiv ilshift imod imul index > inv invert > ior ipow irepeat irshift isub iter itruediv ixor le len lshift lt mod > mul ne neg > not or pos pow repeat repr rshift setitem setslice str sub truediv > xor > '''.split()] > > def add_special_method(cls, name): > def meth(self, *args): > return getattr(self, name)(*args) > meth.__name__ = name > setattr(cls, name, meth) > for name in SPECIALMETHODS: > add_special_method(Impostor, name) > > In this way the Impostor can emulate even the special methods. Here is > an example: > class C(object): > ... > pass > ... c=Impostor(C()) print c > <__main__.C object at 0x102a390> > > Notice that the impostor is calling the __str__ method of C, so it > really looks like a C object. Moreover > c.__class__ > > > and > isinstance(c, C) > True > > so the Impostor is doing a damn pretty good job of imposture for C > objects. Of course it does what it can, and it cannot impersonate C > objects completely: > type(c) > > > so code using checks like ``type(c) is C`` would break and the > approach here cannot be considered more than a hack. That's fun. =) I don't really think it's too much of a hack either. ``type(c) is C`` is expected to fail for proxy classes, which is why everyone keeps getting told to use ``isinstance(c, C)`` instead. In Py3K, when ``isinstance`` becomes overloadable, it's going to be even more of a mistake to write ``type(c) is C``. That said, I doubt I'd want to slow down all attribute access on my class just to do some cleanup, when it's probably better to just tell everyone to use a ``with`` block. ;-) STeVe -- http://mail.python.org/mailman/listinfo/python-list
Re: Drawing a graph
On 8/12/07, Ghirai <[EMAIL PROTECTED]> wrote: > Hello list, > > I need to draw a graph, 2 axes, 2D, nothing fancy. > One of the axes is time, the other one is a series of integers. > > I don't care much about the output format. > > Are there any specialized libraries for this, or should i use PIL? > > Thanks. > > -- > Regards, > Ghirai. > -- > http://mail.python.org/mailman/listinfo/python-list > Checkout matplotlib: http://matplotlib.sourceforge.net/ Powerful (esp. with IPython), clean implementation, very nice output, IMHO. It does depend on some other things; primarily numpy and some sort of backend for displaying figures (usually can use a default backend -- e.g. Tkinter). Otherwise you can plot directly to file. May not be what you're looking for if you want something quick. HTH, Kurt -- http://mail.python.org/mailman/listinfo/python-list
Re: Configuring apache to execute python scripts using mod_python handler
On Aug 13, 5:16 am, joe jacob <[EMAIL PROTECTED]> wrote:
> I configured apache to execute python scripts using mod_python
> handler. I followed below mentioned steps to configure apache.
>
> 1. In http.conf I added
>
>
> AddHandler mod_python .py
> PythonHandler mptest
> PythonDebug On
>
>
> 2. Then I added the line "LoadModule python_module modules/
> mod_python.so" to http.conf.
>
> Then I tried execute the python script mentioned below from browser.
>
> from mod_python import apache
> def handler(req):
> req.content_type = 'text/plain'
> req.write("Hello World!")
> return apache.OK
>
> Then I am getting the following error
>
> Traceback (most recent call last):
>
> File "D:\softwares\Python25\Lib\site-packages\mod_python
> \importer.py", line 1537, in HandlerDispatch
> default=default_handler, arg=req, silent=hlist.silent)
>
> File "D:\softwares\Python25\Lib\site-packages\mod_python
> \importer.py", line 1202, in _process_target
> module = import_module(module_name, path=path)
>
> File "D:\softwares\Python25\Lib\site-packages\mod_python
> \importer.py", line 304, in import_module
> return __import__(module_name, {}, {}, ['*'])
>
> ImportError: No module named mptest
>
> I am using Apache 2.2.4, python 2.5 and mod_python-3.3.1.win32-py2.5-
> Apache2.2.
>
> I am able to execute python scripts by configuring apache to execute
> the cgi scripts. But I want to execute it using mod_python as it is
> faster compared to cgi mode. Someone please help me on this issue.
1) In the mod_python tutorial it says:
---
2.4 Testing
...
...
2. Add the following Apache directives, which can appear in either the
main server configuration file, or .htaccess. If you are going to be
using the .htaccess file, you will not need the tag below
(the directory then becomes the one in which the .htaccess file is
located), ***and you will need to make sure the AllowOverride
directive applicable to this directory has at least FileInfo
specified. (The default is None, which will not work.)
AddHandler mod_python .py
PythonHandler mptest
PythonDebug On
Note the last sentence in the directions above. I explain what is
needed for that part at the link in (2) below. Also note the
directory listed in the opening tag:
/some/directory/htdocs/test
That specifies a sub directory of htdocs. That's because the htdocs
directory has its own tag in httpd.conf, which specifies
the things you can to with it. If you look around in httpd.conf, you
will see the tag that applies to htdocs. Mine looks like
this:
...
...
The mod_python Testing tutorial wants you to create your own sub
directory in htdocs, so that you can specify your own rules for that
directory. You're probably getting errors because you have two
tags in your httpd.conf file for the htdocs directory, and
the second tag is overwriting the first one.
2) You can see the latter part of this thread for what I did to get
mptest.py to work:
http://groups.google.com/group/comp.lang.python/browse_thread/thread/3ccaf303b8b4fd31/ea2645ec03370fb2?lnk=gst&q=mod_python&rnum=1#ea2645ec03370fb2
3) I put any tags I added to httpd.conf below the first
tag in http.conf, which is this one:
so that the ones lower down in the file will override the previous
tags if there is a conflict.
--
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Re: which IDE is highly recommended in Windows OS
www.wingide.com
On 8/13/07, Ge Chunyuan <[EMAIL PROTECTED]> wrote:
>
> On Aug 13, 10:24 am, _spitFIRE <[EMAIL PROTECTED]> wrote:
> > -BEGIN PGP SIGNED MESSAGE-
> > Hash: SHA1
> >
> > Ge Chunyuan wrote:
> > > hi Group:
> >
> > > I am a new comer for Python, I wonder which IDE is recommended in
> > > Windows OS.
> > > Can anyone give some suggestion.
> >
> > > Thanks indeed
> > > Ge Chunyuan
> >
> > - - Stani's Python Editor
> > (
> http://www.softpedia.com/get/Programming/Coding-languages-Compilers/S...)
> > - - Black Adder (http://www.thekompany.com/products/blackadder/)
> > - - Zeus (http://www.zeusedit.com/python.html)
> > - - PyScripter (http://mmm-experts.com/Products.aspx?ProductId=4)
> > - - ActivePython (http://www.activestate.com/)
> > - - IDLE (http://www.python.org/idle/doc/idle2.html)
> >
> > and depending on how you define IDEs, you can also decide whether or not
> to
> > include, the following
> > - - emacs
> > - - vim
> > - - scite
> > ...
> >
> > - --
> > _ _ _]{5pitph!r3}[_ _ _
> > __
> > "I'm smart enough to know that I'm dumb."
> > - Richard P Feynman
> > -BEGIN PGP SIGNATURE-
> > Version: GnuPG v1.4.6 (GNU/Linux)
> > Comment: Using GnuPG with Mozilla -http://enigmail.mozdev.org
> >
> > iD8DBQFGv8DSA0th8WKBUJMRAqGcAJ9hhMp3tyS7XmBZT2+fol/A69j4jwCfXNya
> > xQTmmDlDF5BAfiWkrSW3TuQ=
> > =902n
> > -END PGP SIGNATURE-
>
> thanks buddy, I am now using ActivePython, actually it is beyond my
> expectation:)
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
--
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Assignments and Variable Substitution
I'd like to do something like this: var = '123' %s = [], %var So that, in the end, var is '123' and an empty list is named '123' as well. The list assignments are created during a loop. Thanks, Brad -- http://mail.python.org/mailman/listinfo/python-list
Re: Assignments and Variable Substitution
On Aug 13, 1:00 pm, brad <[EMAIL PROTECTED]> wrote:
> I'd like to do something like this:
>
> var = '123'
> %s = [], %var
>
> So that, in the end, var is '123' and an empty list is named '123' as
> well. The list assignments are created during a loop.
>
> Thanks,
> Brad
You probably want to use a dictionary to store your lists... code
like:
variableDict = {}
variableDict[var] = ['value1', 'value2', 'value3']
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Re: is there anybody using __del__ correctly??
On Aug 13, 6:26 pm, Steven Bethard <[EMAIL PROTECTED]> wrote: > I doubt I'd want to slow down all attribute access on my > class just to do some cleanup, when it's probably better to just tell > everyone to use a ``with`` block. ;-) Amen. The point is that finding an easy upgrade path for current code using __del__ does not look easy at all. Maybe we should be bold, remove __del__ in Py3K, say to everybody to use 'with', and force people to rewrite their code, ignoring the complaints from the big frameworks guys (anyway, they are already complaining ;) Michele Simionato -- http://mail.python.org/mailman/listinfo/python-list
C++ Binding with Threads
Hello, I want to embed Python in an application and use an API of the application from Python. The application uses a library that creates several threads and I the users of the application will write Python scripts handling this events. The problem is that I having problems with threads. I saw that I have to PyEval_InitThreads and then PyThreadState_New and PyThreadState_Swap from the new thread but this way to solve the problem doesn't work for me because I need to let 2 or more threads run at the SAME time. The interpreter lock doesn't let them run at the same time so I'm looking for another solution. I saw Py_NewInterpreter and I tried to use it but it doesn't work if I don't keep the lock. Can anyone help me to solve this issue or tell me 'Forget it!'? Thanks on advance, Pablo Yabo -- http://mail.python.org/mailman/listinfo/python-list
C++ Binding with Threads
Hello, I want to embed Python in an application and use an API of the application from Python. The application uses a library that creates several threads and I the users of the application will write Python scripts handling this events. The problem is that I having problems with threads. I saw that I have to PyEval_InitThreads and then PyThreadState_New and PyThreadState_Swap from the new thread but this way to solve the problem doesn't work for me because I need to let 2 or more threads run at the SAME time. The interpreter lock doesn't let them run at the same time so I'm looking for another solution. I saw Py_NewInterpreter and I tried to use it but it doesn't work if I don't keep the lock. Can anyone help me to solve this issue or tell me 'Forget it!'? Thanks on advance, Pablo Yabo -- http://www.nektra.com -- http://mail.python.org/mailman/listinfo/python-list
Python in Chinese
Back in May, there was quite an extensive discussion of whether or not Python should support Unicode identifiers (with the final result being that this would be supported in Python 3). In my periodic googling for pyparsing users, I stumbled upon Zhpy, a preprocessor that renders on the fly Chinese Python keywords and indentifiers written using traditional Chinese characters into ASCII counterparts, and then executes the resulting script. I was very intrigued at the idea, and I thought back to Martin v. Löwis's PEP. The Zhpy approach will work with current versions of Python (going back to 2.3, since pyparsing requires that version). You can view examples at the pyparsing "Who's Using Pyparsing" wiki page - http://pyparsing.wikispaces.com/WhosUsingPyparsing#Zhpy. Given the breadth of response to Martin v. Löwis's post, I'm curious as to what the reaction might be to something like Zhpy. -- Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: decorators - more than just syntactic sugar
Michele Simionato <[EMAIL PROTECTED]> writes: > On Aug 11, 8:30 pm, Helmut Jarausch <[EMAIL PROTECTED]> wrote: >> Hi, >> >> are decorators more than just syntactic sugar in python 2.x and what >> about python 3k ? > > Well, I argued may times that syntactic sugar is important (all Turing > complete languages differs by syntactic sugar only) Although I agree that "mere" syntactic sugar matters, I think you're overstating the point. I would argue that most people would understand syntactic sugar as equivalent to a (very) localized program transformation. Things like first class continuations clearly aren't syntactic sugar in that sense. 'as -- http://mail.python.org/mailman/listinfo/python-list
Re: Fatest standard way to sum bytes (and their squares)?
Alexander Schmolck <[EMAIL PROTECTED]> writes: > Erik Max Francis <[EMAIL PROTECTED]> writes: > >> Alexander Schmolck wrote: >> >>> Is this any faster? >>> >>> ordSum, orsSumSq = (lambda c:c.real,c.imag)(sum(complex(ord(x),ord(x)<<1) >>> for x in data)) >> >> That's pretty clever, but I neglected to mention that I need to accumulate >> the >> sums as ints/longs to avoid losing precision, so converting to floating point >> isn't an optional. > > I think you can safely use this trick (provided it really makes things faster) > provided you sum blocks no larger than 2**(53-8) bytes; Forgot about the squares; make this 2**(53-16); still pretty big. 'as -- http://mail.python.org/mailman/listinfo/python-list
Re: Python in Chinese
Paul McGuire schrieb: > Back in May, there was quite an extensive discussion of whether or not > Python should support Unicode identifiers (with the final result being > that this would be supported in Python 3). In my periodic googling > for pyparsing users, I stumbled upon Zhpy, a preprocessor that renders > on the fly Chinese Python keywords and indentifiers written using > traditional Chinese characters into ASCII counterparts, and then > executes the resulting script. Interesting! Notice what they do to the identifiers - when translating to "English", the just number them. I wonder what this will do to backtraces, cross-module imports, and such... With Python 3, they can restrict themselves to just translating keywords, and leave all identifiers in place. Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: negative polar axis
Steve Holden wrote: > About the best interpretation I can think of is to add 180 degrees to > the angle and reverse the sign of the magnitude, but this would be a > hack. Where are those coordinates coming from? Well, sometimes in polar coordinates (r, theta), r is allowed to be negative. The usual translation from polar to Cartesian coordinates makes this meaningful, albeit weird, so in effect the resulting positions are just reflections around the origin. Which I suppose is what the original poster was asking about, but it's still not clear. -- Erik Max Francis && [EMAIL PROTECTED] && http://www.alcyone.com/max/ San Jose, CA, USA && 37 20 N 121 53 W && AIM, Y!M erikmaxfrancis The conviction of wisdom is the plague of man. -- Montaigne -- http://mail.python.org/mailman/listinfo/python-list
Re: Colored text
On Aug 13, 10:37 am, Neil Cerutti <[EMAIL PROTECTED]> wrote: > On 2007-08-13, Michael Bentley <[EMAIL PROTECTED]> wrote: > > > > > On Aug 12, 2007, at 7:05 PM, Rohan wrote: > >> Can some one tell me how do I get colored text. Say when I want to > >> write something in a text file , how do I get it colored. > > > You can use ANSI escape codes --http://en.wikipedia.org/wiki/ > > ANSI_escape_code: > > Unfortunately, most versions of Windows of the last 7 years > (2000, XP, probably Vista) don't support ANSI escape codes well > enough to work with Python. > > -- > Neil Cerutti > We have to play hard for the full 40 minutes. 48? Oh, that's right. --Mikki > Moore Check out these recipes: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/475116 http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/496901 -- http://mail.python.org/mailman/listinfo/python-list
Re: Adventure-Engines in Python
Wildemar Wildenburger wrote: > > OK, thanks. I should, of course, have been more specific. By saying > "adventure" I mean the graphical variant (say, Monkey Island or Broken > Sword), preferably but not necessarily in 2D. Perhaps you could get a start from this game: http://www.pygame.org/projects/23/300/ > I've also found vidaG, but it seems dead as well. I'll keep looking but > if you know something, please let me know. I imagine you can pester the developer here: http://dodgyville.livejournal.com/ Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Process Control Help
In article <[EMAIL PROTECTED]>, I mused: >In article <[EMAIL PROTECTED]>, >Azazello <[EMAIL PROTECTED]> wrote: >>On Jul 31, 12:45 pm, Walt Leipold <[EMAIL PROTECTED]> wrote: > . > . > . >>> It has nothing to do with 'proprietary issues'. A lot of it has to do >>> with the perception of support -- who will support Python and custom >>> Python code if my plant shuts down? Who will train my developers and >>> operators? Who can I sue? The rest of it is because of the way the > . > . > . >>> Yes, it's a shame that you have to buy three packages to perform three >>> functions, and then buy other 3rd-party packages to tie them together. >>> Yes, it's a shame that industrial software is expensive, and >>> proprietary, and Windows-only, and generally has a brain-dead scripting >>> language (when it has any scriptability at all). Still, as much as it >>> galls me to say it, if your company's primary business isn't writing >>> industrial automation software, don't write industrial automation >>> software. > . > . > . >>> * Unless you're a hobbyist, if you want to do data acquisition or i/o, >>> purchase an i/o server for your particular bus/instrumentation from a >>> major manufacturer. You *can* write your own i/o server, especially for >>> simple protocols like Modbus, but the commercial versions have been >>> tested more exhaustively than you can manage. Also, the most common >>> protocol these days is OPC, which isn't a protocol at all in the >>> conventional sense -- it's a set of APIs to a Windows DLL, with the >>> wire-level details completely opaque -- so you'd have to buy a library >>> for that anyway. . . . >>> on Visual Basic for Applications rather than a better (and free and Open >>> Source!) language like Python. It's also a tragedy that the dominant >>> i/o 'protocol' for industrial automation isn't really a protocol, and is >>> Windows-only to boot. It's horrifying that the primary means of >>> communication between process control and data acquisition applications >>> is via DDE or ActiveX. And I find it incredible that people and >>> companies will pay large sums of money for some of the industrial >>> automation products on the market. But that's the way the industry >>> works, and, as frustrating as the commercial offerings are, using them >>> will probably be better for you and your company in the long run. > . > . > . >>I really appreciate your post Walt. I started this thread last week >>and I have to admit that in the subsequent days the 'option' of using >>Python for our control solutions is simply not feasible. Although the >>project I wanted to implement was fairly small scale, no 20 ton pieces >>or x-ray machinery, the principle of the matter remains the same, >>especially as a large corporation. As an intern returning to school >>in the fall, the underlying responsibility for a Python system was my >>original concern and discouragement to my employer for persuing this >>path. It became readily apparent that using the crumby software >>packaged with our control devices is surely faster in the long run, as >>we are not involved in software development. (The majority of my >>coworkers' formal programming experience is in FORTRAN) It has been a >>very discouraging few days. There's so much room for improvement and >>yet... My 4-day conclusion is unless you're already involved in >>controls software you must be crazy to join. Are many young engineers >>entering this field? >> > >At an anecdotal level, I'd guess that, no, there are few >young engineers entering this field. . . . 'Just occurred to me that a GREAT thing to do might be for a young engineer to catch the SD Best Practices 2007 East in Boston in September http://www.sdexpo.com/2007/sdbp/overview.htm >, which is running concurrently with Embedded Systems http://www.embedded.com/esc/boston/ > (as well as RFID World http://www.rfid-world.com/boston/ >). They sell inspiration by the half-hour. -- http://mail.python.org/mailman/listinfo/python-list
Re: Module imports during object instantiation
Bruno Desthuilliers wrote: > Ritesh Raj Sarraf a écrit : >> >> if lock is None or lock != 1: >> self.DispLock = False >> else: >> self.DispLock = threading.Lock() >> self.lock = True >> >> if os.name == 'posix': >>self.platform = 'posix' >>self.color = get_colors() >> >> elif os.name in ['nt', 'dos']: >> self.platform = 'microsoft' >> >> try: >> import SomeModule >> except ImportError: >> self.Set_Flag = None >> >> if self.Set_Flag is not None: >> self.color = SomeModule.get_colors_windows() >> >> else: >> self.platform = None >> self.color = None >> >> When I create an object the "import" part never gets executed. Is there a >> reason behind it ? > > what does "print os.name" yields ? On Windows: nt On Linux: posix > >> I mean I'd like to keep my class as independent as I want. So that when >> later I need to use it somewhere else, I don't need to know if it depends >> on any modules. > > > > Then pass the module to the initializer. Python's modules are objects... > Yes, that's an option. But is that the only one? To me it looks like an ugly way of doing. Ritesh -- If possible, Please CC me when replying. I'm not subscribed to the list. -- http://mail.python.org/mailman/listinfo/python-list
Re: Module imports during object instantiation
Bruno Desthuilliers wrote: > Ritesh Raj Sarraf a écrit : > > The initializer will be called *each time* you instanciate the class. > And nothing prevents client code from calling it explicitelly as many > times as it wants - ok, this would be rather strange, but this is still > technically possible. What I mean that you have no assurance about the > number of times an initializer will be called. > Yes, it should be called _each time_ I do an instantiation. But the point is, I'm doing it only once. And I don't see people instantiating multiple times. And even if you do, it should do separate imports. log1 = Log() log2 = Log() Both the objects are separate from each other in every manner and they share nothing. > > wrt/ your problem, remember that top-level code is executed when the > module is loaded (either as a main program or as an imported module). > The canonical solution to os-specific imports is to handle them at the > top-level: > > if os.name == 'posix: >from some_posix_module import get_colors > elif os.name in ['nt', 'dos']: >from some_nt_module import get_windows_color as get_colors > else: >get_colors = lambda: None # or any other sensible default value... > > class SomeClass(object): >def __init__(self, *args, **kw): > self.colors = get_colors() This is what I'm left with to do currently. But I doubt if that makes by classes independent and to "Just Work". If someone was to cut/paste just the class, it won't work. He'll have to go through the imports and figure out which one relates to the class he want's to import and add similar code to his. Ritesh -- If possible, Please CC me when replying. I'm not subscribed to the list. -- http://mail.python.org/mailman/listinfo/python-list
Re: Module imports during object instantiation
Steve Holden wrote: > Ritesh Raj Sarraf wrote: >> class Log: >> >> def __init__(self, verbose, lock = None): >> >> if verbose is True: >> self.VERBOSE = True >> else: self.VERBOSE = False >> > Better: > > self.VERBOSE = verbose > > or, if you suspect verbose might pass in a mutable value, > > self.VERBOSE bool(verbose) > Thanks for pointing this out. > What's leading you to conclude the import isn't being executed? You > realise, I trust, that the module's code will only be executed on the > first call to __init__()? > Well. Putting it in a "try" inside __init__() doesn't do anything. The import never happens. And thus if I make a call in any of the methods, it fails with an error message. A NameError IIRC. > You are right in assuming that __init__() is called once per instance > created, and it's legitimate to make an import conditional in the way > you have because of the "execute code only once" behavior - if the > module is already in sys.modules then it won't be re-imported, the > existing one will be used. > This is what even my understanding is. But am afraid to say that this understanding is not implemented in Python. Have you tried doing this? Does it work for you? > Having said all that, I still don't see why you can't just put the > try/except at the top level of your code and have color be a global. Why > repeat the attempted import and the computation for each object you > create? Alternatively, do it at the class level, so it's only executed > once when the class is declared? > Hmmm!! This is where I might not have done my homework. I just tried to import the same class (Log) the following way and it worked. from module import Log It worked. Now I have some questions. Going with your point of try/except imports at the top level, I am having multiple imports at the top level for the multiple classes that I have in the module. Not everything from the top level imports is required for the class Log (Say, just one module is what is required). So when I do a `from module import Log`, do all the modules at the top level get imported? My understanding says Yes, and if that's true, that's bad IMO. (Sorry! I'd really not thought about this when reading about Python module imports) My ultimate goal is to make all my classes as independent as possible while keeping them as lightweight as possible. If all top level module import statements are getting executed during a `from module import class`, this is _not_ lightweight IMO. That's what led me to try imports in __init__() but unfortunately I haven't seen that working for me even once. Ritesh -- If possible, Please CC me when replying. I'm not subscribed to the list. -- http://mail.python.org/mailman/listinfo/python-list
Re: programmatically define a new variable on the fly
> Anyway, I don´t see the point in this. Why don´t you just use > something like X['g'] instead? While it's not what the original author is intending, it seems to me that dynamically adding fields could be useful when something like a database schema changed frequently. For example, a row in a database might contain data related to a customer and I would think it might be useful to do something like this (where data is a dictionary created from the column names and row data): class Customer: def __init__(self, data): for col_name, value in data.iteritems(): setattr(self, col_name, value) Alternatively, you could just assign the original dictionary to a field on Customer called data and then access it by key: class Customer: def __init__(self, data): self.customerData = data I'm pretty new to Python so it's entirely possible I'm doing things the hard way but if you had behavior on a class, I can see where dynamically creating fields on it would be useful. -- http://mail.python.org/mailman/listinfo/python-list
Re: Dictionary viewer and editor
On Monday 13 August 2007, Ariel Balter wrote:
> http://mail.python.org/pipermail/python-list/2001-August/100288.html
>
> Did you ever finish writing this?
YAML (without flow style) could qualify as "tree format". example:
yaml.dump ( {"alpha": 1, "beta": 2, "otherstuff": {"bug": None, "cool":
True, "foo": ["bar", 2e64, {13: 'many eyes', 14: 'make all', 15: 'bugs
shallow'}]}}, default_flow_style=False )
... is ...
alpha: 1
beta: 2
otherstuff:
bug: null
cool: true
foo:
- bar
- !!float '2e+64'
- 13: many eyes
14: make all
15: bugs shallow
--
http://mail.python.org/mailman/listinfo/python-list
Re: Drawing a graph
I ended up using matplotlib (http://matplotlib.sourceforge.net). Thanks for the input everyone. -- Regards, Ghirai. -- http://mail.python.org/mailman/listinfo/python-list
Re: python 2.5 bug
Dustan wrote: > On Aug 11, 12:32 am, Thorsten Kampe <[EMAIL PROTECTED]> wrote: >> 4. don't do something you don't fully understand (in this case >>installing Python 2.5 and uninstalling Python 2.4) > > If we were all limited by that rule, none of us would never have used > a computer in the first place. Operating a computer is a learning > experience, no matter what level you're at (although admittedly the > lessons learned can sometimes be hurtful). > Hi, I'm new to python. I'm male 48yo have a daughter, divorced. Live in BA. Read Introduct me python and am at page 56 of shafting python the right way. Have 220v alternate current (notice ! not 110v), my computer is dirty, used to be whitish, got an epson printer (stylus c65). My computer table is wood and some plastic. It's 16:05 and we are +4GMT here, temp is 17Centigrades and no wind. Ok. The question is... shit, I forgot the question! Get to you later. ;c) -- http://mail.python.org/mailman/listinfo/python-list
Re: Finding gurus (was Re: Something in the function tutorial confused me.)
Aahz wrote: > In article <[EMAIL PROTECTED]>, > Alex Martelli <[EMAIL PROTECTED]> wrote: >> Because of this, a Google search for >> >> " " python >> >> may sometimes help; when you get 116,000 hits, as for "Steve Holden" >> python, that may be a reasonable indication that the poster is one of >> the world's Python Gurus (in fact, the winner of the 2007 Frank WIllison >> Award -- congratulations, Steve!!!). > > Sometimes that precise search pattern isn't appropriate, of course. ;-) Sorry, will answer as soon as I read the 52000 hits for "Aahz python". Be patient ;c) -- http://mail.python.org/mailman/listinfo/python-list
Re: Assignments and Variable Substitution
On 8/13/07, brad <[EMAIL PROTECTED]> wrote: > I'd like to do something like this: > > var = '123' > %s = [], %var > > So that, in the end, var is '123' and an empty list is named '123' as > well. The list assignments are created during a loop. You can't assign a variable whose name is 123, but you can do this sort of thing with setattr. -- Evan Klitzke <[EMAIL PROTECTED]> -- http://mail.python.org/mailman/listinfo/python-list
Re: The Future of Python Threading
On Aug 11, 12:59 pm, Kay Schluehr <[EMAIL PROTECTED]> wrote: > Have you checked out the processing [1] package? I've currently the > impression that people want to change the whole language before they > checkout a new package. It would be nice to read a review. > > [1]http://cheeseshop.python.org/pypi/processing Sounds interesting. How does it work? tell us about it! -- http://mail.python.org/mailman/listinfo/python-list
