[python-win32] passing c structure into python function

[Tim Roberts]

a h wrote:
>
> I have witten C code which call a function defined in python, passing
> an structure, but couldn't know how to pass c structure into a python
> function(data conversion) and how to write python script
> function which takes an c structure and fill value into it (commented
> portion)
>  
> I have looked at struct module but couldn't understand that how it
> works for below.
>  
> typedef struct employee
> {
>  char emp_name[10];
>  int emp_ID;
> }emp;

I would pass the struct as a string of 14 bytes, then use
    emp_name, emp_ID = struct.unpack( '=10cI', incoming )

class employee:
    def __init__( self, name, id ):
        self.name = name
        self.id = id
    def to_file( self, f ):
        f.write( struct,pack( '=10cI', self.name, self.id )
    def from_string( self, s ):
        self.name, self.id = struct.unpack( '=10cI', s )

f = open( 'testing', 'w' )
e = employee( 'Testing', 923 )
e.to_file( f )

-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.