Re: Does the Python/C interface support Queue objects?
"[EMAIL PROTECTED]" wrote: > A little background. I made a C dll that sets up a thread for > collecting data from an NI data aquisition card. The thread builds a > list and passes the list to to python via a callback, then python puts > them in the Queue. I would prefer to put the data in the Queue from > the C thread for efficiency, and then monitor the Queue from python. the Queue type is implemented in Python, so you won't gain much by skipping the callback. but if you insist, you can use the abstract API to manipulate the queue object: http://docs.python.org/api/object.html res = PyObject_CallMethod(queue, "put", "O", object); ... check error status ... Py_DECREF(res); -- http://mail.python.org/mailman/listinfo/python-list
Does the Python/C interface support Queue objects?
I'm a new user of the Python C interface. I would like to know if it is possible to put items on a standard python Queue object in C, and pop them from Python. Does the Python/C interface support Queue objects? A little background. I made a C dll that sets up a thread for collecting data from an NI data aquisition card. The thread builds a list and passes the list to to python via a callback, then python puts them in the Queue. I would prefer to put the data in the Queue from the C thread for efficiency, and then monitor the Queue from python. -- http://mail.python.org/mailman/listinfo/python-list
Re: Interface support?
> "Michael" == Michael Spencer <[EMAIL PROTECTED]> writes: Michael> Steve wrote: >> Is it possible to design interfaces that classes must implement >> in Python? Michael> PyProtocols: http://peak.telecommunity.com/PyProtocols.html, This (PyProtocols) seems to be the one with biggest momentum at the time being, so if you can't be bothered to perform an independent and balanced evaluation, go for PyProtocols :-). -- Ville Vainio http://tinyurl.com/2prnb -- http://mail.python.org/mailman/listinfo/python-list
Re: Interface support?
Steve wrote: Is it possible to design interfaces that classes must implement in Python? There are some well-known 'independent' implementations of interfaces: Zope Interfaces :http://www.zope.org/Wikis/Interfaces/FrontPage - a separable component of the much larger app server Twisted Interfaces: see http://twistedmatrix.com/ PyProtocols: http://peak.telecommunity.com/PyProtocols.html, whose author is one of the protagonists in the PEP246 saga There are also several possible light-weight roll-your-own solutions One common idiom is an abstract base class: class SomeInterface(object): def someMethod(self, argspec): # Should never get here, because the implementation overrides this method raise NotImplmentedError but the compiler doesn't pay any special attention to these classes so failure to implement the interface is detected at runtime If it's not, is this functionality planned at all for the future? Python Enhancement Proposals 245, and 246 http://www.python.org/peps/ discuss an interface syntax and the related topic of object adaptation. These are both current discussions among the Python developers with no decision on whether/when to introduce either as far as I know. Observer the fray at: http://mail.python.org/pipermail/python-dev/ Guido Van Rossum (Python creator and BDFL) recently blogged about "Optional Static Type Checking" http://www.artima.com/weblogs/viewpost.jsp?thread=89161 as part of long-range planning for a future Python 3000 (some years in the future) HTH Michael -- http://mail.python.org/mailman/listinfo/python-list
Re: Interface support?
Now they use the same interface package. For the other questions: google is your friend. (try "zope interfaces" then "twisted interfaces"). -- http://mail.python.org/mailman/listinfo/python-list
Re: Interface support?
Michele Simionato wrote: Twisted and Zope already use interfaces. You can download the interface package and use it in you project. Thanks for the response. I'm completely new to Python, where exactly would I go to find these interface packages(Python site, or Twisted/Zope sites)? Is it the same interface package for both, or are they different? If different, is one better than the other? Thanks, Steve -- http://mail.python.org/mailman/listinfo/python-list
Re: Interface support?
Twisted and Zope already use interfaces. You can download the interface package and use it in you project. Michele Simionato -- http://mail.python.org/mailman/listinfo/python-list
Interface support?
Is it possible to design interfaces that classes must implement in Python? If it's not, is this functionality planned at all for the future? Thanks, Steve -- http://mail.python.org/mailman/listinfo/python-list
