Create diskimage-builder element for installing python of specific version

python-install/README.rst

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+==============
+python-install
+==============
+
+Install Python of specific version (default 2.7.13)
+
+Usage::
+	export ELEMENTS_PATH=$(pwd)
+	DIB_PYTHON_INSTALL_VERSION=2.7.13 disk-image-create ubuntu vm python-install
+

python-install/element-deps

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+package-installs

python-install/install.d/30-python-install

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+#!/bin/bash
+
+if [ ${DIB_DEBUG_TRACE:-0} -gt 0 ]; then
+    set -x
+fi
+set -eu
+set -o pipefail
+
+# Install specified version of Python from source code
+
+PYTHON_INSTALL=Python-${DIB_PYTHON_INSTALL_VERSION:="2.7.13"}
+
+cd /usr/local/src
+wget https://www.python.org/ftp/python/${DIB_PYTHON_INSTALL_VERSION}/${PYTHON_INSTALL}.tgz
+tar xfz ${PYTHON_INSTALL}.tgz
+cd ${PYTHON_INSTALL}
+./configure
+make
+make install
+python --version
+

python-install/package-installs.yaml

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+# package list from
+#   http://mbless.de/blog/2016/01/09/upgrade-to-python-2711-on-ubuntu-1404-lts.html
+autotools-dev:
+blt-dev:
+bzip2:
+dpkg-dev:
+g++-multilib:
+gcc-multilib:
+libbluetooth-dev:
+libbz2-dev:
+libexpat1-dev:
+libffi-dev:
+libffi6:
+libffi6-dbg:
+libgdbm-dev:
+libgpm2:
+libncursesw5-dev:
+libreadline-dev:
+libsqlite3-dev:
+libssl-dev:
+libtinfo-dev:
+mime-support:
+net-tools:
+netbase:
+python-crypto:
+python-mox3:
+python-pil:
+python-ply:
+quilt:
+tk-dev:
+zlib1g-dev:
+# extra package required by centos7
+gcc:
+wget: