diff --git a/.python-version b/.python-version
new file mode 100644
index 0000000000000000000000000000000000000000..61553c0a198d5e2c3918a53e466bae1f96746877
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+python-c-interface3.6.4
diff --git a/python-c-api_solution/Makefile b/python-c-api_solution/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..375d89f733c115c1d2f2d46e56123244a70e0f98
--- /dev/null
+++ b/python-c-api_solution/Makefile
@@ -0,0 +1,9 @@
+#http://www.cs.colby.edu/maxwell/courses/tutorials/maketutor/
+CC=gcc
+CFLAGS=-I.
+
+test_script: main.o demolib.o
+ $(CC) -o test_script main.o demolib.o
+
+clean:
+ rm -f *.o
\ No newline at end of file
diff --git a/python-c-api_solution/demolib.c b/python-c-api_solution/demolib.c
new file mode 100644
index 0000000000000000000000000000000000000000..39d66e9af907677bc27a2a1d813ac14276572141
--- /dev/null
+++ b/python-c-api_solution/demolib.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "demolib.h"
+
+int add_number(int number_1, int number_2) {
+ int result = number_1 + number_2;
+ return result;
+}
+
+// https://stackoverflow.com/questions/8465006/how-do-i-concatenate-two-strings-in-c
+
+char* make_str(const char *s1, const char *s2) {
+ char *result = malloc(strlen(s1) + strlen(s2) + 1);
+ strcpy(result, s1);
+ strcat(result, s2);
+ return result;
+}
+
+int add_number_using_pointer() {
+
+}
+
+
+
diff --git a/python-c-api_solution/demolib.h b/python-c-api_solution/demolib.h
new file mode 100644
index 0000000000000000000000000000000000000000..17ce34495fadd00e04318dd51f8ff79e87c4a898
--- /dev/null
+++ b/python-c-api_solution/demolib.h
@@ -0,0 +1,6 @@
+// Example header file
+
+// char construct_string(int number);
+
+int add_number(int number_1, int number_2);
+char* make_str(const char *s1, const char *s2);
\ No newline at end of file
diff --git a/python-c-api_solution/demolib.o b/python-c-api_solution/demolib.o
new file mode 100644
index 0000000000000000000000000000000000000000..5896b43ecea3a7fb3097c0b062930226d5bc57dd
Binary files /dev/null and b/python-c-api_solution/demolib.o differ
diff --git a/python-c-api_solution/demomodule.c b/python-c-api_solution/demomodule.c
new file mode 100644
index 0000000000000000000000000000000000000000..1657aca00836095a00929dff4e20ec84eb65090f
--- /dev/null
+++ b/python-c-api_solution/demomodule.c
@@ -0,0 +1,63 @@
+// demomodule.c
+#include <Python.h>
+#include "demolib.h"
+
+
+// https://stackoverflow.com/questions/51505391/how-to-parse-void-to-pyobject
+
+
+static PyObject *DemoLib_AddNumber(PyObject *self, PyObject *args) {
+ int *number_1;
+ int *number_2;
+ if (!PyArg_ParseTuple(args, "ii", &number_1, &number_2)) {
+ return NULL;
+ }
+
+ int result;
+ result = add_number(number_1, number_2);
+
+ return Py_BuildValue("i", result);
+}
+
+static PyObject *DemoLib_MakeStr(PyObject *self, PyObject *args) {
+ char *character_1;
+ char *character_2;
+ if (!PyArg_ParseTuple(args, "ss", &character_1, &character_2)) {
+ return NULL;
+ }
+
+ char* result;
+ result = make_str(character_1, character_2);
+
+ return Py_BuildValue("s", result);
+}
+
+// module's function table
+static PyMethodDef DemoLib_FunctionsTable[] = {
+ {
+ "add_number", // name exposed to Python
+ DemoLib_AddNumber, // C wrapper function
+ METH_VARARGS, // received variable args (but really just 1)
+ "adds two numbers" // documentation
+ }, {
+ "make_str", // name exposed to Python
+ DemoLib_MakeStr, // C wrapper function
+ METH_VARARGS, // received variable args (but really just 1)
+ "adds two strings" // documentation
+ }, {
+ NULL, NULL, 0, NULL
+ }
+};
+
+// modules definition
+static struct PyModuleDef DemoLib_Module = {
+ PyModuleDef_HEAD_INIT,
+ "demo", // name of module exposed to Python
+ "Demo Python wrapper for custom C extension library.", // module documentation
+ -1,
+ DemoLib_FunctionsTable
+};
+
+PyMODINIT_FUNC PyInit_demo(void) {
+ return PyModule_Create(&DemoLib_Module);
+}
\ No newline at end of file
diff --git a/python-c-api_solution/main.c b/python-c-api_solution/main.c
new file mode 100644
index 0000000000000000000000000000000000000000..3e05435dd83c83c6d64510c136a6106a241cd953
--- /dev/null
+++ b/python-c-api_solution/main.c
@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include "demolib.h"
+
+
+int main(void) {
+ // Testing stuff for add_number function
+ int getal_1=2;
+ int getal_2=3;
+
+ int result;
+ result = add_number(getal_1, getal_2);
+ printf("%d\n", result);
+ //
+
+
+ // testing stuff for concatenate string function
+ char* str_1 = "a";
+ char* str_2 = "b";
+
+ char* s = make_str(str_1, str_2);
+ // do things with s
+ printf("%s\n", s);
+
+ free(s); // deallocate the string
+ //
+
+ // testing stuff to
+
+
+
+
+
+ return(0);
+}
\ No newline at end of file
diff --git a/python-c-api_solution/main.o b/python-c-api_solution/main.o
new file mode 100644
index 0000000000000000000000000000000000000000..e29df7dd325a7b1a79365f68f3ad84979b8f9351
Binary files /dev/null and b/python-c-api_solution/main.o differ
diff --git a/python-c-api_solution/setup.py b/python-c-api_solution/setup.py
new file mode 100644
index 0000000000000000000000000000000000000000..0354312c193a3abc6b4495d4ecafbf759744cbb6
--- /dev/null
+++ b/python-c-api_solution/setup.py
@@ -0,0 +1,11 @@
+from setuptools import Extension, setup
+
+module = Extension("demo",
+ sources=[
+ 'demolib.c',
+ 'demomodule.c'
+ ])
+setup(name='demo',
+ version='1.0',
+ description='Python wrapper for custom C extension',
+ ext_modules=[module])
\ No newline at end of file
diff --git a/python-c-api_solution/test_script b/python-c-api_solution/test_script
new file mode 100755
index 0000000000000000000000000000000000000000..f97b74885b85f148dd55b72354cc0b1763672653
Binary files /dev/null and b/python-c-api_solution/test_script differ
diff --git a/python-c-api_solution/todo.org b/python-c-api_solution/todo.org
new file mode 100644
index 0000000000000000000000000000000000000000..8911529d323e93b8a8ac311f055887192fc71834
--- /dev/null
+++ b/python-c-api_solution/todo.org
@@ -0,0 +1,20 @@
+
+* DONE Construct function in c that returns combines 2 strings
+ CLOSED: [2019-10-30 Wed 16:59]
+* DONE Wrap this in python
+ CLOSED: [2019-10-30 Wed 16:59]
+
+* DONE construct a function in c that adds 2 numbers
+ CLOSED: [2019-10-30 Wed 16:59]
+* DONE Wrap this in python
+ CLOSED: [2019-10-30 Wed 16:59]
+* TODO Construct a function in c that uses a function pointer to combine two numbers
+* TODO wrap this in python
+
+
+
+
+
+
+
+* TODO Construct a simple program that recieves a function pointer AND a value, and passes that value to that function pointer
diff --git a/python-c-api_solution/todo.org~ b/python-c-api_solution/todo.org~
new file mode 100644
index 0000000000000000000000000000000000000000..86fcc941df9cbd8dd93981703f92156fd9dc8565
--- /dev/null
+++ b/python-c-api_solution/todo.org~
@@ -0,0 +1,2 @@
+* TODO construct simple program in c that prints a value
+* TODO Interface this function with python