add class example

CMakeLists.txt

@@ -22,3 +22,6 @@ target_link_libraries(c-api ${Python3_LIBRARIES})
 
 pybind11_add_module("Prime" pybind/heavy_example/module.cpp)
 pybind11_add_module("CppMath" pybind/sum_example/module.cpp)
+pybind11_add_module("Cpp" pybind/class_example/module.cpp)
+
+add_subdirectory(pybind/embedded_example)

README.md

@@ -27,7 +27,12 @@
 
 - Slide 4
   Using Pythons C/C++ API is hard.
-  
 
+- Slide 5
+  Using pybind11 makes it look like python code
+
+- Slide 6
+  Lets look at some examples
 
-- Overview of python
+- Slide 7
+  Embedding the interpreter

pybind/class_example/module.cpp

+#include <pybind11/operators.h>
+#include <pybind11/pybind11.h>
+#include <sstream>
+
+namespace py = pybind11;
+
+class point {
+public:
+  int x = 0, y = 0, z = 0;
+  bool operator==(const point &left) const {
+    return x == left.x && y == left.y && z == left.z;
+  }
+};
+
+PYBIND11_MODULE(Cpp, m) {
+  py::class_<point>(m, "Point")
+      .def(py::init<>())
+      .def(py::self == py::self, "test")
+      .def_readwrite("x", &point::x)
+      .def_readwrite("y", &point::y)
+      .def_readwrite("z", &point::z)
+      .def("__repr__", [](const point &self) {
+        std::stringstream ss;
+        ss << "x: " << self.x << ", y: " << self.y << ", z: " << self.z;
+        return ss.str();
+      })
+
+      ;
+}

pybind/class_example/test.py

+from sys import path
+path.append("./../../build")
+
+from Cpp import Point
+
+p = Point()
+
+p.x = 100
+p.y = 100
+p.z = 12
+
+print(p)