From a650193eec19cf3a80a2d6af01ab4a40735a0423 Mon Sep 17 00:00:00 2001
From: Dorian Pula <dorian.pula@amber-penguin-software.ca>
Date: Wed, 6 Feb 2019 08:57:13 -0500
Subject: [PATCH] Wire up to run function as Python code.

---
 Cargo.toml   |  5 ++++
 Pipfile      | 13 ++++++++
 Pipfile.lock | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 README.md    |  8 ++++-
 src/lib.rs   | 15 ++++++++++
 test.py      |  2 ++
 6 files changed, 125 insertions(+), 1 deletion(-)
 create mode 100644 Pipfile
 create mode 100644 Pipfile.lock
 create mode 100644 test.py

diff --git a/Cargo.toml b/Cargo.toml
index bb856d4..804dccb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,4 +4,9 @@ version = "0.1.0"
 authors = ["Dorian Pula <dorian.pula@points.com>"]
 edition = "2018"
 
+[lib]
+name = "unit_converter"
+crate-type = ["cdylib"]
+
 [dependencies]
+pyo3 = { version = "0.6.0-alpha.2", features = ["extension-module"] }
diff --git a/Pipfile b/Pipfile
new file mode 100644
index 0000000..7ca8a99
--- /dev/null
+++ b/Pipfile
@@ -0,0 +1,13 @@
+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+
+[packages]
+pyo3-pack = "*"
+pytest = "*"
+
+[requires]
+python_version = "3.6"
diff --git a/Pipfile.lock b/Pipfile.lock
new file mode 100644
index 0000000..9a5d283
--- /dev/null
+++ b/Pipfile.lock
@@ -0,0 +1,83 @@
+{
+    "_meta": {
+        "hash": {
+            "sha256": "0630251fe5bf105722ab858c5ac0549f000628fbbfa4255c36a7fcfef9ed3559"
+        },
+        "pipfile-spec": 6,
+        "requires": {
+            "python_version": "3.6"
+        },
+        "sources": [
+            {
+                "name": "pypi",
+                "url": "https://pypi.org/simple",
+                "verify_ssl": true
+            }
+        ]
+    },
+    "default": {
+        "atomicwrites": {
+            "hashes": [
+                "sha256:03472c30eb2c5d1ba9227e4c2ca66ab8287fbfbbda3888aa93dc2e28fc6811b4",
+                "sha256:75a9445bac02d8d058d5e1fe689654ba5a6556a1dfd8ce6ec55a0ed79866cfa6"
+            ],
+            "version": "==1.3.0"
+        },
+        "attrs": {
+            "hashes": [
+                "sha256:10cbf6e27dbce8c30807caf056c8eb50917e0eaafe86347671b57254006c3e69",
+                "sha256:ca4be454458f9dec299268d472aaa5a11f67a4ff70093396e1ceae9c76cf4bbb"
+            ],
+            "version": "==18.2.0"
+        },
+        "more-itertools": {
+            "hashes": [
+                "sha256:38a936c0a6d98a38bcc2d03fdaaedaba9f412879461dd2ceff8d37564d6522e4",
+                "sha256:c0a5785b1109a6bd7fac76d6837fd1feca158e54e521ccd2ae8bfe393cc9d4fc",
+                "sha256:fe7a7cae1ccb57d33952113ff4fa1bc5f879963600ed74918f1236e212ee50b9"
+            ],
+            "version": "==5.0.0"
+        },
+        "pluggy": {
+            "hashes": [
+                "sha256:8ddc32f03971bfdf900a81961a48ccf2fb677cf7715108f85295c67405798616",
+                "sha256:980710797ff6a041e9a73a5787804f848996ecaa6f8a1b1e08224a5894f2074a"
+            ],
+            "version": "==0.8.1"
+        },
+        "py": {
+            "hashes": [
+                "sha256:bf92637198836372b520efcba9e020c330123be8ce527e535d185ed4b6f45694",
+                "sha256:e76826342cefe3c3d5f7e8ee4316b80d1dd8a300781612ddbc765c17ba25a6c6"
+            ],
+            "version": "==1.7.0"
+        },
+        "pyo3-pack": {
+            "hashes": [
+                "sha256:19250198b465b2b872ec3ef362b925ae8af1963119783b1d38f7d61a4c56faf8",
+                "sha256:623a1f8159a26385d24ec63653ed21bf73d49f1ecdbd141314e799b905e35f49",
+                "sha256:756987d0de960d33ac23e409134821d142cbba4cae6ffd6ec4fb63a67cef6305",
+                "sha256:768d883a36dad98dbac6f7b44730b33686f3b0f71d4ebf2b6beb3884fbb70015",
+                "sha256:c14d82499896804b49c4d7175402db7e0dff165575d9797370ae75cf7221b62a"
+            ],
+            "index": "pypi",
+            "version": "==0.4.2"
+        },
+        "pytest": {
+            "hashes": [
+                "sha256:65aeaa77ae87c7fc95de56285282546cfa9c886dc8e5dc78313db1c25e21bc07",
+                "sha256:6ac6d467d9f053e95aaacd79f831dbecfe730f419c6c7022cb316b365cd9199d"
+            ],
+            "index": "pypi",
+            "version": "==4.2.0"
+        },
+        "six": {
+            "hashes": [
+                "sha256:3350809f0555b11f552448330d0b52d5f24c91a322ea4a15ef22629740f3761c",
+                "sha256:d16a0141ec1a18405cd4ce8b4613101da75da0e9a7aec5bdd4fa804d0e0eba73"
+            ],
+            "version": "==1.12.0"
+        }
+    },
+    "develop": {}
+}
diff --git a/README.md b/README.md
index a61e9f0..72c0213 100644
--- a/README.md
+++ b/README.md
@@ -8,9 +8,15 @@ An example of a Rust library that is embeddable in Python and Web Assembly.
 
 Insure the following dependencies are in place:
 
-* Rust v1.32+
+* Rust v1.32+ (nightly)
+    * Install using `rustup toolchain install nightly`
+    * Set default toolchain `rustup default nightly`
 * Python 3 Development headers (python3-dev in Ubuntu)
 
+## Running the Python example
+
+1. Build the rust crate first: `cargo build`
+
 ## Documentation
 
 * [PyO3 Python - Rust bindings](https://pyo3.rs/master/get_started.html)
diff --git a/src/lib.rs b/src/lib.rs
index 44b7f27..3dfee57 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,7 +1,22 @@
+#![feature(specialization)]
+
+#[macro_use] extern crate pyo3;
+
+use pyo3::prelude::*;
+
+
+#[pyfunction]
 fn convert_celsius_to_fahrenheit(celsius: f32) -> f32 {
     celsius * 1.8 + 32.0
 }
 
+#[pymodule]
+fn unit_converter(_py: Python, m: &PyModule) -> PyResult<()> {
+    m.add_wrapped(wrap_pyfunction!(convert_celsius_to_fahrenheit))?;
+
+    Ok(())
+}
+
 #[cfg(test)]
 mod tests {
 
diff --git a/test.py b/test.py
new file mode 100644
index 0000000..793b05c
--- /dev/null
+++ b/test.py
@@ -0,0 +1,2 @@
+import unit_converter
+