python alternatives to C structs??

[KoolD]

Hey all,
I need to convert a C code to python please help me figure out how to
do
it.
Suppose the C program's like:

------------------------------------
typedef struct _str
{
int a;
char *b;
int c;
}str;
int main()
{
str mbr;
fd=open("/dev/sda",O_RDONLY);
read(fd,&mbr,sizeof(str));
}
------------------------------------

Is there a way to code it in python.

Thanks
Sourya