Broadcasting problem on basic operations? about xtensor-python

[tdegeus]

That sounds like a bug. Thanks for reporting.

[JohanMabille]

Hi,

Does the following work?

py::array<double> res = arr1 - arr2;
std::cout << res << std::endl;

[ThibHlln]

Hi,

Sorry, my example was misleading: this is when the Python interface is used that the problem occurs as I tried to demonstrate in your existing testing suite with:
https://github.com/ThibHlln/xtensor-python/blob/broadcasting-problem/test_python/main.cpp#L114-L132
https://github.com/ThibHlln/xtensor-python/blob/broadcasting-problem/test_python/test_pyarray.py#L66-L108

If the pyarrays are defined directly in C++, the broadcasting works. This is when working with pyarrays defined via the Python bindings that the problem occurs (observable both in the returned numpy array and if I do a std::cout << arr1 - arr2 << std::endl; in C++).

[JohanMabille]

I can reproduce the problem, I am investigating.

[ThibHlln]

Thank you! This works perfectly now.

By the way, in https://github.com/xtensor-stack/xtensor-python/blob/6a286681c48c35d3df342f291938f4825b20c0a3/test_python/test_pyarray.py, perhaps you did not mean to comment out all the other tests?