refactor importClass and valgrind

2023-11-12 00:02:49 +01:00
parent a3bf97e501
commit c7372b7fc7
9 changed files with 1596906 additions and 44 deletions
--- a/example/test.cpp
+++ b/example/test.cpp
@@ -0,0 +1,85 @@
+#include <Python.h>
+#include <iostream>
+#include <string>
+
+class Test {
+public:
+    Test() = default;
+    ~Test()
+    {
+        Py_DECREF(test);
+        Py_DECREF(object);
+    }
+    void create()
+    {
+        test = Py_BuildValue("s", "Hello World from a method in Embedded Python!!!");
+        std::cout << "test " << test->ob_refcnt << std::endl;
+        std::string moduleName = "sklearn.svm.SVC";
+        PyObject* pyModuleName = PyUnicode_FromString(moduleName.c_str());
+        std::cout << "py_module_name " << pyModuleName->ob_refcnt << std::endl;
+        object = PyImport_AddModuleObject(pyModuleName);
+        if (PyErr_Occurred()) {
+            std::cerr << "Couldn't import module " + moduleName;
+            Py_XDECREF(test);
+            Py_XDECREF(object);
+            Py_XDECREF(pyModuleName);
+            exit(1);
+        }
+        std::cout << "module " << object->ob_refcnt << std::endl;
+        Py_XDECREF(pyModuleName);
+    }
+    PyObject* test;
+    PyObject* object;
+
+};
+
+void print(PyObject* object, std::string name)
+{
+    std::cout << name << " " << object->ob_refcnt << std::endl;
+}
+
+int main(int argc, char* argv[])
+{
+    Py_Initialize();
+    std::string moduleName = "sklearn.svm";
+    std::cout << "1a" << std::endl;
+    PyObject* module = PyImport_ImportModule(moduleName.c_str());
+    if (PyErr_Occurred()) {
+        std::cerr << "Couldn't import module " << moduleName;
+        exit(1);
+    }
+    print(module, "module");
+    std::cout << "1b" << std::endl;
+    std::string className = "SVC";
+    PyObject* classObject = PyObject_GetAttrString(module, className.c_str());
+    if (PyErr_Occurred()) {
+        std::cerr << "Couldn't find class " << className;
+        exit(1);
+    }
+    print(classObject, "classObject");
+    std::cout << "1c" << std::endl;
+    PyObject* instance = PyObject_CallObject(classObject, NULL);
+    if (PyErr_Occurred()) {
+        std::cerr << "Couldn't create instance of class " << className;
+        exit(1);
+    }
+    print(instance, "instance");
+    std::cout << std::string(40, '-') << std::endl;
+    print(module, "module");
+    print(classObject, "classObject");
+    print(instance, "instance");
+    std::cout << "decref instance" << std::endl;
+    Py_DECREF(instance);
+    std::cout << "decref classobject" << std::endl;
+    Py_DECREF(classObject);
+    std::cout << "decref module" << std::endl;
+    Py_DECREF(module);
+    std::cout << std::string(40, '-') << std::endl;
+    print(module, "after decref module");
+    print(classObject, "after decref classObject");
+    print(instance, "after decref instance");
+    std::cout << "**call finalize" << std::endl;
+    Py_Finalize();
+    std::cout << "**after finalize" << std::endl;
+    return 0;
+}