mirror of
https://github.com/pybind/pybind11.git
synced 2024-12-01 17:37:15 +00:00
16afbcef46
* Add value_type member alias to py::array_t (resolve #632) * Use numpy scalar name in py::array_t function signatures (e.g. float32/64 instead of just float)
188 lines
7.3 KiB
C++
188 lines
7.3 KiB
C++
/*
|
|
tests/test_numpy_array.cpp -- test core array functionality
|
|
|
|
Copyright (c) 2016 Ivan Smirnov <i.s.smirnov@gmail.com>
|
|
|
|
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>
|
|
#include <pybind11/stl.h>
|
|
|
|
#include <cstdint>
|
|
#include <vector>
|
|
|
|
using arr = py::array;
|
|
using arr_t = py::array_t<uint16_t, 0>;
|
|
static_assert(std::is_same<arr_t::value_type, uint16_t>::value, "");
|
|
|
|
template<typename... Ix> arr data(const arr& a, Ix... index) {
|
|
return arr(a.nbytes() - a.offset_at(index...), (const uint8_t *) a.data(index...));
|
|
}
|
|
|
|
template<typename... Ix> arr data_t(const arr_t& a, Ix... index) {
|
|
return arr(a.size() - a.index_at(index...), a.data(index...));
|
|
}
|
|
|
|
arr& mutate_data(arr& a) {
|
|
auto ptr = (uint8_t *) a.mutable_data();
|
|
for (size_t i = 0; i < a.nbytes(); i++)
|
|
ptr[i] = (uint8_t) (ptr[i] * 2);
|
|
return a;
|
|
}
|
|
|
|
arr_t& mutate_data_t(arr_t& a) {
|
|
auto ptr = a.mutable_data();
|
|
for (size_t i = 0; i < a.size(); i++)
|
|
ptr[i]++;
|
|
return a;
|
|
}
|
|
|
|
template<typename... Ix> arr& mutate_data(arr& a, Ix... index) {
|
|
auto ptr = (uint8_t *) a.mutable_data(index...);
|
|
for (size_t i = 0; i < a.nbytes() - a.offset_at(index...); i++)
|
|
ptr[i] = (uint8_t) (ptr[i] * 2);
|
|
return a;
|
|
}
|
|
|
|
template<typename... Ix> arr_t& mutate_data_t(arr_t& a, Ix... index) {
|
|
auto ptr = a.mutable_data(index...);
|
|
for (size_t i = 0; i < a.size() - a.index_at(index...); i++)
|
|
ptr[i]++;
|
|
return a;
|
|
}
|
|
|
|
template<typename... Ix> size_t index_at(const arr& a, Ix... idx) { return a.index_at(idx...); }
|
|
template<typename... Ix> size_t index_at_t(const arr_t& a, Ix... idx) { return a.index_at(idx...); }
|
|
template<typename... Ix> size_t offset_at(const arr& a, Ix... idx) { return a.offset_at(idx...); }
|
|
template<typename... Ix> size_t offset_at_t(const arr_t& a, Ix... idx) { return a.offset_at(idx...); }
|
|
template<typename... Ix> size_t at_t(const arr_t& a, Ix... idx) { return a.at(idx...); }
|
|
template<typename... Ix> arr_t& mutate_at_t(arr_t& a, Ix... idx) { a.mutable_at(idx...)++; return a; }
|
|
|
|
#define def_index_fn(name, type) \
|
|
sm.def(#name, [](type a) { return name(a); }); \
|
|
sm.def(#name, [](type a, int i) { return name(a, i); }); \
|
|
sm.def(#name, [](type a, int i, int j) { return name(a, i, j); }); \
|
|
sm.def(#name, [](type a, int i, int j, int k) { return name(a, i, j, k); });
|
|
|
|
test_initializer numpy_array([](py::module &m) {
|
|
auto sm = m.def_submodule("array");
|
|
|
|
sm.def("ndim", [](const arr& a) { return a.ndim(); });
|
|
sm.def("shape", [](const arr& a) { return arr(a.ndim(), a.shape()); });
|
|
sm.def("shape", [](const arr& a, size_t dim) { return a.shape(dim); });
|
|
sm.def("strides", [](const arr& a) { return arr(a.ndim(), a.strides()); });
|
|
sm.def("strides", [](const arr& a, size_t dim) { return a.strides(dim); });
|
|
sm.def("writeable", [](const arr& a) { return a.writeable(); });
|
|
sm.def("size", [](const arr& a) { return a.size(); });
|
|
sm.def("itemsize", [](const arr& a) { return a.itemsize(); });
|
|
sm.def("nbytes", [](const arr& a) { return a.nbytes(); });
|
|
sm.def("owndata", [](const arr& a) { return a.owndata(); });
|
|
|
|
def_index_fn(data, const arr&);
|
|
def_index_fn(data_t, const arr_t&);
|
|
def_index_fn(index_at, const arr&);
|
|
def_index_fn(index_at_t, const arr_t&);
|
|
def_index_fn(offset_at, const arr&);
|
|
def_index_fn(offset_at_t, const arr_t&);
|
|
def_index_fn(mutate_data, arr&);
|
|
def_index_fn(mutate_data_t, arr_t&);
|
|
def_index_fn(at_t, const arr_t&);
|
|
def_index_fn(mutate_at_t, arr_t&);
|
|
|
|
sm.def("make_f_array", [] {
|
|
return py::array_t<float>({ 2, 2 }, { 4, 8 });
|
|
});
|
|
|
|
sm.def("make_c_array", [] {
|
|
return py::array_t<float>({ 2, 2 }, { 8, 4 });
|
|
});
|
|
|
|
sm.def("wrap", [](py::array a) {
|
|
return py::array(
|
|
a.dtype(),
|
|
std::vector<size_t>(a.shape(), a.shape() + a.ndim()),
|
|
std::vector<size_t>(a.strides(), a.strides() + a.ndim()),
|
|
a.data(),
|
|
a
|
|
);
|
|
});
|
|
|
|
struct ArrayClass {
|
|
int data[2] = { 1, 2 };
|
|
ArrayClass() { py::print("ArrayClass()"); }
|
|
~ArrayClass() { py::print("~ArrayClass()"); }
|
|
};
|
|
|
|
py::class_<ArrayClass>(sm, "ArrayClass")
|
|
.def(py::init<>())
|
|
.def("numpy_view", [](py::object &obj) {
|
|
py::print("ArrayClass::numpy_view()");
|
|
ArrayClass &a = obj.cast<ArrayClass&>();
|
|
return py::array_t<int>({2}, {4}, a.data, obj);
|
|
}
|
|
);
|
|
|
|
sm.def("function_taking_uint64", [](uint64_t) { });
|
|
|
|
sm.def("isinstance_untyped", [](py::object yes, py::object no) {
|
|
return py::isinstance<py::array>(yes) && !py::isinstance<py::array>(no);
|
|
});
|
|
|
|
sm.def("isinstance_typed", [](py::object o) {
|
|
return py::isinstance<py::array_t<double>>(o) && !py::isinstance<py::array_t<int>>(o);
|
|
});
|
|
|
|
sm.def("default_constructors", []() {
|
|
return py::dict(
|
|
"array"_a=py::array(),
|
|
"array_t<int32>"_a=py::array_t<std::int32_t>(),
|
|
"array_t<double>"_a=py::array_t<double>()
|
|
);
|
|
});
|
|
|
|
sm.def("converting_constructors", [](py::object o) {
|
|
return py::dict(
|
|
"array"_a=py::array(o),
|
|
"array_t<int32>"_a=py::array_t<std::int32_t>(o),
|
|
"array_t<double>"_a=py::array_t<double>(o)
|
|
);
|
|
});
|
|
|
|
// Overload resolution tests:
|
|
sm.def("overloaded", [](py::array_t<double>) { return "double"; });
|
|
sm.def("overloaded", [](py::array_t<float>) { return "float"; });
|
|
sm.def("overloaded", [](py::array_t<int>) { return "int"; });
|
|
sm.def("overloaded", [](py::array_t<unsigned short>) { return "unsigned short"; });
|
|
sm.def("overloaded", [](py::array_t<long long>) { return "long long"; });
|
|
sm.def("overloaded", [](py::array_t<std::complex<double>>) { return "double complex"; });
|
|
sm.def("overloaded", [](py::array_t<std::complex<float>>) { return "float complex"; });
|
|
|
|
sm.def("overloaded2", [](py::array_t<std::complex<double>>) { return "double complex"; });
|
|
sm.def("overloaded2", [](py::array_t<double>) { return "double"; });
|
|
sm.def("overloaded2", [](py::array_t<std::complex<float>>) { return "float complex"; });
|
|
sm.def("overloaded2", [](py::array_t<float>) { return "float"; });
|
|
|
|
// Only accept the exact types:
|
|
sm.def("overloaded3", [](py::array_t<int>) { return "int"; }, py::arg().noconvert());
|
|
sm.def("overloaded3", [](py::array_t<double>) { return "double"; }, py::arg().noconvert());
|
|
|
|
// Make sure we don't do unsafe coercion (e.g. float to int) when not using forcecast, but
|
|
// rather that float gets converted via the safe (conversion to double) overload:
|
|
sm.def("overloaded4", [](py::array_t<long long, 0>) { return "long long"; });
|
|
sm.def("overloaded4", [](py::array_t<double, 0>) { return "double"; });
|
|
|
|
// But we do allow conversion to int if forcecast is enabled (but only if no overload matches
|
|
// without conversion)
|
|
sm.def("overloaded5", [](py::array_t<unsigned int>) { return "unsigned int"; });
|
|
sm.def("overloaded5", [](py::array_t<double>) { return "double"; });
|
|
|
|
// Issue 685: ndarray shouldn't go to std::string overload
|
|
sm.def("issue685", [](std::string) { return "string"; });
|
|
sm.def("issue685", [](py::array) { return "array"; });
|
|
sm.def("issue685", [](py::object) { return "other"; });
|
|
});
|