Hi,

to share data, a number of libraries use the buffer protocol(s)[0].

There seems to be a python issue open [1], and a typing issue open [2].

Anyone have better interim solution(s) that work cross-library?

The given work-around in [2] doesn't really work in a number of cases:

Consider if this would work with array.array, or <type 'numpy.ndarray'> or dozens of other libraries buffer protocol friendly types.

As a concrete example, numpy is adding the ndarray to that Union using this [3]:

Whilst this supports ndarray, it doesn't scale to the full list of third party types supporting buffer protocol(s) [opencv, pygame, pillow, ...].

Every suggestion appreciated -- even the strangest, ugliest, most horrific of hacks. Thanks.

cheers,

[0] https://docs.python.org/3/c-api/buffer.html

[2] https://github.com/python/typing/issues/593