Hi,
sorry for the vague subject, but I can't come up with a better one so far.
I am currently writing a wrapper around ImageMagicks MagickWand
library using the ctypes module. During this development i have to
handle exceptions in an slightly different way, then python normally
handles them.
I am wrapping the libraries functionality in a class that looks like
that. (I leave out the ctypes calls and stuff as far as it is
possible.)
class MagickWand(object):
def __init__(self):
self._wand = <create a MagickWand instance using ctypes>
@my_funky_decorator
def read_image(self, filename):
return <ctypes call of the MagickWand C function to read an image>
You can see, I plan to have my own MagickWand object, which wraps the
C struct and functions. The normal habit of MagickWand is to call a
function, that returns either True or False. Based on this the user
has to check for an exception or not.
I will have to wrap a lot of methods to get all the functionality I
need. And the checking for an exception looks always the same. So I
want to write short methods, which are decorated by my_funky_decorator
which handles the error checking and exception handling. Sadly, this
decorator needs access to self._wand from the current object.
So far I can only think of a solution, where I have to do something like that.
@my_funky_decorator(wand=<some way to access the _wand>)
def read_image(self, filename):
pass
So, I like to ask, if someone could enlighten me how to implement the
easy decorator I mentioned in my first "example".
Thanks and best regards,
Oliver
--
Oliver Andrich <[EMAIL PROTECTED]> --- http://roughbook.de/
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