Hi,
Jørgen P. Tjernø wrote:
> I'm currently using Cython to provide some bindings to a C api. I'm
> using classes to "wrap" the various C structs, but they're VERY
> repetetive to write, since many of the attribute I expose are in the form:
>
> property title:
> def __get__(self):
> return self.track.title
>
> Is there any shorthand for this? :-)
No. We could potentially transform
@property
def title(self): return self.track.title
into the above code, but that wouldn't be that much shorter either.
http://trac.cython.org/cython_trac/ticket/264
Note that there is a shortcut for direct class attributes, though, so you
could write
class SomeClass:
cdef readonly object some_attribute
to get a read-only property "some_attribute" that is still accessed
efficiently (and is writable) from Cython code. But this does not work for
your case above.
> Also, I want to initialize them with a C struct pointer (they're only
> ever initialized by my Cython code, not by the user themselves), is
> there a better way than:
>
> cdef class Artist:
> def __init__(self):
> raise TypeError("This class cannot be instantiated from Python")
>
> cdef extern from "foo.h":
> cdef Artist NEW_ARTIST "PY_NEW" (object t)
>
> # #define PY_NEW(T) \
> # (((PyTypeObject*)(T))->tp_new( \
> # (PyTypeObject*)(T), __pyx_empty_tuple, NULL))
>
> cdef Artist _create_artist(artist* artist, bool take_owner=False):
> cdef Artist instance
>
> instance = NEW_TRACK(Artist)
> instance.artist = artist
> instance.take_owner = take_owner
> return instance
Again, we could potentially do some things here.
http://trac.cython.org/cython_trac/ticket/263
However, this is a pretty common and also very fast way of doing this, so
you can't currently do better.
Stefan
_______________________________________________
Cython-dev mailing list
[email protected]
http://codespeak.net/mailman/listinfo/cython-dev
