[ctypes-users] passing File object

[Vaibhav.bhawsar <bha...@gm...>]

Hello i sent this earlier but got no response- any help would be great.

I have come across some posts regarding this but am unable to grasp this
concept- any help would be appreciated.

I have generated a python wrapper (_gl2ps) for C library called gl2ps. this
process
is also mentioned on the ctypes wiki.

i now have a generated function "gl2psBeginPage" and one of the argtypes is
POINTER(FILE)

class __sFILE(Structure):
pass
FILE = __sFILE
gl2psBeginPage = _libraries['/usr/local/lib/libgl2ps.dylib'].gl2psBeginPage
gl2psBeginPage.restype = GLint
gl2psBeginPage.argtypes = [STRING, STRING, POINTER(GLint), GLint, GLint,
GLint, GLint, GLint, POINTER(GL2PSrgba), GLint, GLint, GLint, GLint,
POINTER(FILE), STRING]

In python i import this generated py file and am trying to pass an open file
object to function gl2psBeginPage(...)
*
ff* = open('out.eps',"w")
_gl2ps.gl2psBeginPage("test", "gl2psTestSimple", None, _gl2ps.GL2PS_EPS,
_gl2ps.GL2PS_SIMPLE_SORT,
_gl2ps.GL2PS_DRAW_BACKGROUND | _gl2ps.GL2PS_USE_CURRENT_VIEWPORT,
GL_RGBA, 0, None, 0, 0, 0, buffsize,
*ff*, "out.eps")

I get this error:
ctypes.ArgumentError: argument 14: <type 'exceptions.TypeError'>: expected
LP___
sFILE instance instead of file

I am a little confused about how i should pass this file object (ff). Does
it have something to do with using in_dll?

Thanks in advance!
-- 
Vaibhav