>> lens are forced to be <= Py_ssize_t because that's the limit put on
>>  sequence sizes.
> 
> But this should be a secuence issue... or not?  Why I'm limiting the
> general len()/__len__ infrastructure?

Because a C type is used to represent it, not a Python object. Any
C type (whichever you chose) will have a length restriction.

More specifically, it's because of this definition from object.h:

typedef Py_ssize_t (*lenfunc)(PyObject *);

   ...
   lenfunc sq_length;

If you were asking whether it is good as it is: yes, practicality
beats purity. Being pure here has no real value.


Regards,
Martin
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