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/*
tests/test_numpy_vectorize.cpp -- auto-vectorize functions over NumPy array
arguments
Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
All rights reserved. Use of this source code is governed by a
BSD-style license that can be found in the LICENSE file.
*/
#include "pybind11_tests.h"
#include <pybind11/numpy.h>
double my_func(int x, float y, double z) {
py::print("my_func(x:int={}, y:float={:.0f}, z:float={:.0f})"_s.format(x, y, z));
return (float) x*y*z;
}
std::complex<double> my_func3(std::complex<double> c) {
return c * std::complex<double>(2.f);
}
test_initializer numpy_vectorize([](py::module &m) {
// Vectorize all arguments of a function (though non-vector arguments are also allowed)
m.def("vectorized_func", py::vectorize(my_func));
// Vectorize a lambda function with a capture object (e.g. to exclude some arguments from the vectorization)
m.def("vectorized_func2",
[](py::array_t<int> x, py::array_t<float> y, float z) {
return py::vectorize([z](int x, float y) { return my_func(x, y, z); })(x, y);
}
);
// Vectorize a complex-valued function
m.def("vectorized_func3", py::vectorize(my_func3));
/// Numpy function which only accepts specific data types
m.def("selective_func", [](py::array_t<int, py::array::c_style>) { return "Int branch taken."; });
m.def("selective_func", [](py::array_t<float, py::array::c_style>) { return "Float branch taken."; });
m.def("selective_func", [](py::array_t<std::complex<float>, py::array::c_style>) { return "Complex float branch taken."; });
// Internal optimization test for whether the input is trivially broadcastable:
py::enum_<py::detail::broadcast_trivial>(m, "trivial")
.value("f_trivial", py::detail::broadcast_trivial::f_trivial)
.value("c_trivial", py::detail::broadcast_trivial::c_trivial)
.value("non_trivial", py::detail::broadcast_trivial::non_trivial);
m.def("vectorized_is_trivial", [](
py::array_t<int, py::array::forcecast> arg1,
py::array_t<float, py::array::forcecast> arg2,
py::array_t<double, py::array::forcecast> arg3
) {
size_t ndim;
std::vector<size_t> shape;
std::array<py::buffer_info, 3> buffers {{ arg1.request(), arg2.request(), arg3.request() }};
return py::detail::broadcast(buffers, ndim, shape);
});
});
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