-Pyrex. This will typically involve a fairly simple wrapping of the C
-API in a Pyrex module (e.g. afs._pts), and then a higher-level
-wrapping of that Pyrex module in pure Python (e.g. afs.pts).
+Cython. This will typically involve a fairly simple wrapping of the C
+API in a Cython module (e.g. afs._pts), and then a higher-level
+wrapping of that Cython module in pure Python (e.g. afs.pts).