tp_getattrfunc, access members that are a list

[Torsten Mohr]

Hi,

in the documentation and the examples that describe how to
make the members of a new type accessible it says that
i need to use the getattrfunc and setattrfunc if i want
to access members that are an array.

typedef struct {
PyObject_HEAD
unsigned char d[8];
} pmod_obj;

Sadly i did not find any example on how to do this.

Can anybody describe me how i can access the array d[8]
as a list? I'd like to get AND set values in there.


Thanks for any hints,
Torsten.

 

[Thomas Heller]

Hi,

in the documentation and the examples that describe how to
make the members of a new type accessible it says that
i need to use the getattrfunc and setattrfunc if i want
to access members that are an array.

typedef struct {
PyObject_HEAD
unsigned char d[8];
} pmod_obj;

Sadly i did not find any example on how to do this.

Can anybody describe me how i can access the array d[8]
as a list? I'd like to get AND set values in there.

I don't think you can expose them as a list, but you should look into
structmember.h, and it's PyMemberDef to expose the items separately.

Thomas

 

[Torsten Mohr]

Can anybody describe me how i can access the array d[8]

I don't think you can expose them as a list, but you should look into
structmember.h, and it's PyMemberDef to expose the items separately.

Hi,

i've looked into structmember.h, but nothing (like e.g. a flag)
can mark that member as an array.
Also, i can't just export every single array member, as i need
to access them indexed, e.g. in a for() for clearing, for
setting calculated values, ...

In the documentation i read that accessing arrays should be done
by getattr/setattr functions. This must be possible somehow...


Best regards,
Torsten.

 

[Thomas Heller]

Can anybody describe me how i can access the array d[8]
as a list? I'd like to get AND set values in there.

I don't think you can expose them as a list, but you should look into
structmember.h, and it's PyMemberDef to expose the items separately.

Hi,

i've looked into structmember.h, but nothing (like e.g. a flag)
can mark that member as an array.
Also, i can't just export every single array member, as i need
to access them indexed, e.g. in a for() for clearing, for
setting calculated values, ...

In the documentation i read that accessing arrays should be done
by getattr/setattr functions. This must be possible somehow...

Ok, structmember.h was the wrong hint - it is used to expose
heterogenous fields.

For sequence like behaviour, you must implement PySequenceMethods:
sq_length, sq_item, sq_add_item for example.

Thomas

 

[Torsten Mohr]

Hi,

For sequence like behaviour, you must implement PySequenceMethods:
sq_length, sq_item, sq_add_item for example.

thanks for that hint, i'll try that one.


Best regards,
Torsten.