mcapell · December 9, 2016 14:40 · Feb 21, 2016 · Jul 20, 2015 · Jul 20, 2015 · May 27, 2015
diff --git a/rust-python-cffi.md b/rust-python-cffi.md
@@ -1,6 +1,6 @@
-This is a small demo of how to create a library in [Rust](http://www.rust-lang.org/) and call it from Python (both CPython and PyPy) using the [CFFI](https://cffi.readthedocs.org/en/latest/)
+This is a small demo of how to create a library in [Rust](http://www.rust-lang.org/) and call it from Python (both CPython and PyPy) using the [CFFI](https://cffi.readthedocs.org/en/latest/) instead of `ctypes`.
 
-Based on http://harkablog.com/calling-rust-from-c-and-python.html which used `ctypes`
+Based on http://harkablog.com/calling-rust-from-c-and-python.html (dead) which used `ctypes`
 
 CFFI is nice because:
 

diff --git a/rust-python-cffi.md b/rust-python-cffi.md
@@ -1,4 +1,4 @@
-This is a small demo of how to create a library in [Rust](http://www.rust-lang.org/) and call it from Python using the [CFFI](https://cffi.readthedocs.org/en/latest/)
+This is a small demo of how to create a library in [Rust](http://www.rust-lang.org/) and call it from Python (both CPython and PyPy) using the [CFFI](https://cffi.readthedocs.org/en/latest/)
 
 Based on http://harkablog.com/calling-rust-from-c-and-python.html which used `ctypes`
 

diff --git a/rust-python-cffi.md b/rust-python-cffi.md
@@ -1,4 +1,4 @@
-This is a small demo of how to create a library in [Rust](http://www.rust-lang.org/) and calling it from Python via the [CFFI](https://cffi.readthedocs.org/en/latest/)
+This is a small demo of how to create a library in [Rust](http://www.rust-lang.org/) and call it from Python using the [CFFI](https://cffi.readthedocs.org/en/latest/)
 
 Based on http://harkablog.com/calling-rust-from-c-and-python.html which used `ctypes`
 
@@ -17,7 +17,7 @@ from either of:
 * `brew install rust`
 * [Multirust](https://gist.github.com/seanjensengrey/07bb8ae5397a81d39321)
 
-I recommend installing Rust via `multirust` so that you can compile projects that use unstable features (core) as well as testing for Rust 1.0 backwards compatibility.
+I recommend installing Rust via `multirust` so that you can compile projects that use unstable features (core) as well as testing for Rust 1.0,1.1, etc backwards compatibility.
 
 The per-directory override mechanism is especially nice.
 

diff --git a/README.md → rust-python-cffi.md b/README.md → rust-python-cffi.md
diff --git a/README.md b/README.md
@@ -6,4 +6,42 @@ CFFI is nice because:
 
 * Reads C declarations (parses headers)
 * Works in both CPython and PyPy (included with PyPy)
-* Lower call overhead than `ctypes`
+* Lower call overhead than `ctypes`
+
+----
+
+# Install Rust
+
+from either of:
+
+* `brew install rust`
+* [Multirust](https://gist.github.com/seanjensengrey/07bb8ae5397a81d39321)
+
+I recommend installing Rust via `multirust` so that you can compile projects that use unstable features (core) as well as testing for Rust 1.0 backwards compatibility.
+
+The per-directory override mechanism is especially nice.
+
+# Build library
+
+```
+rustc treble.rs
+```
+
+This will create a `libtreble.dylib`
+
+# Run the Python client
+
+```
+python test.py 
+```
+
+```
+<cffi.api.FFILibrary_./libtreble.dylib object at 0x1089d5490>
+math from rust! 30
+```
+
+
+
+
+
+
diff --git a/test.py b/test.py
@@ -11,5 +11,5 @@
 
 ffi.cdef('int treble(int);')
 
-print lib.treble(10)
-# 30
+print "math from rust!", lib.treble(10)
+
diff --git a/README.md b/README.md
@@ -0,0 +1,9 @@
+This is a small demo of how to create a library in [Rust](http://www.rust-lang.org/) and calling it from Python via the [CFFI](https://cffi.readthedocs.org/en/latest/)
+
+Based on http://harkablog.com/calling-rust-from-c-and-python.html which used `ctypes`
+
+CFFI is nice because:
+
+* Reads C declarations (parses headers)
+* Works in both CPython and PyPy (included with PyPy)
+* Lower call overhead than `ctypes`
diff --git a/test.py b/test.py
@@ -0,0 +1,15 @@
+try:
+    from cffi import FFI
+except ImportError:
+    print "pip install cffi, included with PyPy"
+
+ffi = FFI()
+lib = ffi.dlopen("./libtreble.dylib")
+
+print lib
+# <cffi.api.FFILibrary_./libtreble.dylib object at 0x107f440d0>
+
+ffi.cdef('int treble(int);')
+
+print lib.treble(10)
+# 30
diff --git a/treble.rs b/treble.rs
@@ -0,0 +1,6 @@
+#![crate_type = "dylib"]
+
+#[no_mangle]
+pub extern fn treble(value: i32) -> i32 {
+    value * 3
+}