Python 3.6.2 (#423)

* pypy3-5.8.0

* updated cpython to 3.6.2

* update README to reflect new Python version

README.md

@@ -8,7 +8,7 @@ This is the official [Heroku buildpack](https://devcenter.heroku.com/articles/bu
 
 Recommended web frameworks include **Django** and **Flask**. The recommended webserver is **Gunicorn**. There are no restrictions around what software can be used (as long as it's pip-installable). Web processes must bind to `$PORT`, and only the HTTP protocol is permitted for incoming connections.
 
-Some Python packages with obscure C dependencies (e.g. scipy) are [not compatible](https://devcenter.heroku.com/articles/python-c-deps).
+Some Python packages with obscure C dependencies are [not compatible](https://devcenter.heroku.com/articles/python-c-deps).
 
 See it in Action
 ----------------
@@ -23,7 +23,7 @@ Deploying a Python application couldn't be easier:
     $ git push heroku master
     ...
     -----> Python app detected
-    -----> Installing python-2.7.13
+    -----> Installing python-3.6.2
          $ pip install -r requirements.txt
            Collecting requests (from -r requirements.txt (line 1))
              Downloading requests-2.12.4-py2.py3-none-any.whl (576KB)
@@ -46,11 +46,11 @@ Specify a Python Runtime
 Specific versions of the Python runtime can be specified with a `runtime.txt` file:
 
     $ cat runtime.txt
-    python-3.6.1
+    python-2.7.13
 
 Runtime options include:
 
+- `python-3.6.2`
 - `python-2.7.13`
-- `python-3.6.1`
 - `pypy-5.7.1` (unsupported, experimental)
 - `pypy3-5.5.1` (unsupported, experimental)

bin/compile

@@ -32,7 +32,7 @@ CACHE_DIR=$2
 ENV_DIR=$3
 
 # Python defaults
-DEFAULT_PYTHON_VERSION="python-3.6.1"
+DEFAULT_PYTHON_VERSION="python-3.6.2"
 DEFAULT_PYTHON_STACK="cedar-14"
 PYTHON_EXE="/app/.heroku/python/bin/python"
 PIP_VERSION="9.0.1"

builds/runtimes/python-3.6.2

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# Build Path: /app/.heroku/python/
+# Build Deps: libraries/sqlite
+
+OUT_PREFIX=$1
+
+echo "Building Python..."
+SOURCE_TARBALL='https://python.org/ftp/python/3.6.2/Python-3.6.2.tgz'
+curl -L $SOURCE_TARBALL | tar xz
+mv Python-3.6.2 src
+cd src
+
+./configure --prefix=$OUT_PREFIX --with-ensurepip=no
+make
+make install
+
+ln $OUT_PREFIX/bin/python3 $OUT_PREFIX/bin/python
+