Added wrapping to cython lecture

Code/mpipattern8.py

@@ -42,8 +42,8 @@
 # compute cumulitive sum for our section
 x=0
 for index, item in enumerate(list1):
-     x += item
-     list1[index] = x
+    x += item
+    list1[index] = x
 
 # now send cum sum to other ranks.  This is a bit fiddly
 # we first send from 1mod2 to 0mod2 then from

Cython/lib/cexample.c

@@ -0,0 +1,14 @@
+#include "cexample.h"
+
+int fibonacci(int n){
+
+	int i,a,b,tmp;
+	a=0;
+	b=1;
+	for (i=0;i<(n-1);i++){
+		tmp = a+b;
+		a = b;
+		b = tmp;
+	}
+	return b;
+}

Cython/lib/cexample.h

@@ -0,0 +1,6 @@
+#ifndef C_EXAMPLE_H
+#define C_EXAMPLE_H
+
+int fibonacci(int n);
+
+#endif

Cython/setup.py

@@ -0,0 +1,16 @@
+from distutils.core import setup
+from distutils.extension import Extension
+from Cython.Build import cythonize
+
+cexample_extension = Extension(
+    name="wrapcexample",            
+    sources=["wrapcexample.pyx"],
+    libraries=["cexample"],
+    library_dirs=["lib"],
+    include_dirs=["lib"]
+)
+
+setup(
+    name="wrapcexample",
+    ext_modules=cythonize([cexample_extension])
+)

Cython/wrapcexample.pyx

@@ -0,0 +1,7 @@
+cdef extern from "cexample.h":
+    int fibonacci(int n)
+
+def cfib(n):
+    cdef m
+    m = fibonacci(n)
+    return m