On Thu, May 14, 2009 at 9:05 AM, Robert<kxrobe...@googlemail.com> wrote: > Dag Sverre Seljebotn wrote: >> Robert wrote: >>> How to deal with Python's array.array directly - as with numpy.pxd >>> is there a array.pxd ? >> >> Which Python version? > > mainly 2.6; and 2.3 > >> Under Python 3 this should probably happen automatically, try: >> >> cdef object[int, ndim=1, mode="c"] arr = yourarray >> >> Not sure about Python 2.6+ > > 2.6.2 didn't: > File "calc_c.pyx", line 32, in calc_c.test1 (calc_c.c:808) > cdef object[float, ndim=1, mode="c"] b = pyarray > TypeError: 'array.array' does not have the buffer interface > > in Python "buffer(myarray)" also behaves strange > >> For Python 2.5- an array.pxd must be written. It is not difficult, one >> simply follows the pattern in numpy.pxd (by implementing __getbuffer__ >> and filling in the Py_buffer struct). >> >> If somebody ends up doing this, please submit it for inclusion in >> Python. > > I've put a array.pxd here: > http://trac.cython.org/cython_trac/ticket/314
hi, what's the status on this? it seemed very useful. if it needs tests, i could try to write some given some info on where to start, what to cover or maybe some cython-numpy tests to from which to crib? thanks, -brent > > -- > Cython direct interface to Python's array.array type (builtin module). > > * 1D contiguous data view > * 2D views - contigious or [x,y] transposed/strided > * tools for fast array creation, maximum C-speed and handiness > * suitable as allround light weight auto-array within Cython > code too > > See also: array_example.pyx and doc strings > -- > > Tests needed. just used it in 2.6 so far. > > Robert > > > PS: For 2.3 a need arose for conditional compilation within the pxd. > http://docs.cython.org/docs/language_basics.html#conditional-compilation > doesn't seem to allow comparison against the python version so far? ) > > _______________________________________________ > Cython-dev mailing list > Cython-dev@codespeak.net > http://codespeak.net/mailman/listinfo/cython-dev > _______________________________________________ Cython-dev mailing list Cython-dev@codespeak.net http://codespeak.net/mailman/listinfo/cython-dev
