我创建了.pyd文件:
#include <pybind11/pybind11.h>
#include <iostream>
#include <typeinfo>
namespace py = pybind11;
int add(int num) {
float a = 1.0;
for (int i = 0; i <= num; i = i + 1) {
a = (a + i)/a;
}
std::cout << "dll is typing: " << a << '\n';
std::cout << typeid(a).name() << std::endl;
return a;
}
PYBIND11_MODULE(py_dll, m) {
m.doc() = "pybind11 py_dll plugin"; // optional module docstring
m.def("add", &add, "Add function", py::arg("num"));
}
我从python调用它:
import py_dll
num = 500
a = py_dll.add(num)
print ('python is typing: ', a)
它打印:
为什么数字变成整数?我说的是22。我希望它是浮动22.8722
答案 0 :(得分:1)
此功能
int add(int num)
采用int
作为参数并返回int
。 “问题”与pybind无关。试试看:
int main() {
auto x = add(42);
std::cout << "return value: " << x << '\n';
std::cout << typeid(x).name() << std::endl;
}
如果函数应返回float
,则必须声明它返回float
:
float add(int num)