Re: [capi-sig] Passing an object from script to C code

(sorry, accidentally hit 'send')

Gamze Tunali wrote:

As a beginner, I have a question about passing a class instance from Python script to my C code. What I am doing is basically creating a class in the script:

class dbvalue: def __init__(self, index, type): self.id = index # unsigned integer self.type = type # string

last_roi = dbvalue(id, type); bmdl_batch.set_input_from_db(1, last_roi); <--------

I would like to call my C function with last_roi and able to recover id and type in the code.

You may want to leave these things to Cython:

cdef class dbvalue:
   cdef unsigned int id
   cdef str type

   def __init__(self, index, type):
       self.id = index   # will raise an exception if not uint
       self.type = type.encode('ASCII')

...
class ...:
    def set_input_from_db(self, someval, dbvalue value):
        print someval, value.id, value.type

Cython will translate this to efficient C code for you.

http://cython.org/

Stefan