Add C/C++ extension module with example functions and test script

Author: EtkinD

setup.py

@@ -0,0 +1,20 @@
+from setuptools import setup, Extension
+
+# C/C++ extension module configuration
+module = Extension(
+    "pycmtemplate_c",
+    sources=["src/main.cpp"],
+    include_dirs=[],
+    extra_compile_args=["-std=c++11"],
+)
+
+setup(
+    name="pycmtemplate",
+    version="0.0.1",
+    description="Python C template",
+    long_description="Python C/C++ template project",
+    author="Etkin Dogan",
+    author_email="etkindogan@gmail.com",
+    python_requires=">=3.8",
+    ext_modules=[module],
+)

src/main.cpp

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+#include <Python.h>
+
+// CPP functions that will be called from Python
+static PyObject *functionFromCPP(PyObject *self, PyObject *args)
+{
+    printf("This message comes from CPP\n");
+    return Py_BuildValue("s", "Hello from CPP");
+}
+
+static PyObject *functionFromCPP2(PyObject *self, PyObject *args)
+{
+    int a, b;
+    if (!PyArg_ParseTuple(args, "ii", &a, &b))
+        return NULL;
+    printf("The sum of %d and %d is %d\n", a, b, a + b);
+    return Py_BuildValue("i", a + b);
+}
+
+// CPP Variables that will be used in Python
+static PyObject *variableFromCPP = PyLong_FromLong(42);
+static PyObject *variableFromCPP2 = Py_BuildValue("s", "Hello from CPP variable 2");
+
+// Method definition structure
+static PyMethodDef MyMethods[] = {
+    // Method definition structure
+    {"functionFromCPP", functionFromCPP, METH_VARARGS, "Function from CPP"},
+    {"functionFromCPP2", functionFromCPP2, METH_VARARGS, "Function from CPP with arguments"},
+    {NULL, NULL, 0, NULL} // Sentinel
+};
+
+// Module definition to register the module
+static struct PyModuleDef etkindmodule = {
+    PyModuleDef_HEAD_INIT,
+    "pycmtemplate_c", // Module name
+    NULL,             // Module documentation
+    -1,               // Size of per-interpreter state
+    MyMethods};
+
+// Module initialization
+PyMODINIT_FUNC PyInit_pycmtemplate_c(void)
+{
+    // Create the module
+    PyObject *module = PyModule_Create(&etkindmodule);
+    if (module == NULL)
+        return NULL;
+
+    // Add variables to the module
+    PyModule_AddObject(module, "variableFromCPP", variableFromCPP);
+    PyModule_AddObject(module, "variableFromCPP2", variableFromCPP2);
+
+    return module;
+}

tests/test1.py

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+import pycmtemplate_c
+
+print("Function calls")
+r1 = pycmtemplate_c.functionFromCPP()
+r2 = pycmtemplate_c.functionFromCPP2(3, 5)
+
+print("Print results")
+print(r1)
+print(r2)
+
+print("Print variables")
+print(pycmtemplate_c.variableFromCPP)
+print(pycmtemplate_c.variableFromCPP2)