Extended functions in embedded code

[Chris Angelico]

On Wed, Oct 14, 2015 at 2:29 AM, Ervin Hegedüs <airween at gmail.com> wrote:
>>
>> Sounds to me like the easiest way would be to inject into the
>> builtins. You should be able to import the builtins module from your C
>> code, and then stuff some extra attributes into it; they'll be
>> automatically available to the script, same as the "normal" built-in
>> names like int, super, and ValueError.
>
> well, sounds good - this solution would be right for me. Could
> you show me a good example and/or documentation about this? I've
> looked up, but "python extend built-in module" is may be too
> simple expression :).

It'd look broadly like this:

/* initialize the interpreter, yada yada */
PyObject *builtins = PyImport_ImportModule("builtins");
PyModule_AddFunctions(builtins, mymodule_methods);

instead of the current module initialization. You import the name
'builtins', stuff some extra stuff into it, and then go on your merry
way. It should be reasonably easy.

ChrisA