Install Python under Raspbian

python_setup_raspbian.sh

#!/bin/bash

# This script is meant for quick & easy install via:
#   $ curl -fsSL https://gist.githubusercontent.com/gwin-zegal/d9b4a1ec926bd6654aaa1e3670de86e1/raw/python_setup_raspbian.sh | sh

sudo apt-get -y update
sudo apt-get install -y build-essential tk-dev libncurses5-dev libncursesw5-dev libreadline-dev libdb5.3-dev libgdbm-dev libsqlite3-dev libssl-dev libbz2-dev libexpat1-dev liblzma-dev zlib1g-dev libffi-dev

PY_VERSION='3.7.2'

curl -o /tmp/python.tar.xz https://www.python.org/ftp/python/${PY_VERSION}/Python-${PY_VERSION}.tar.xz
tar xf /tmp/python.tar.xz \
    --directory=/tmp/python \
    --strip 1

mkdir /tmp/python
cd /tmp/python
./configure
make -j 4
sudo make altinstall

cd /usr/local/bin
sudo ln -s 2to3-3.7 2to3
sudo ln -s easy_install-3.7 easy_install
sudo ln -s idle3.7 idle
sudo ln -s pydoc3.7 pydoc
sudo ln -s pyvenv-3.7 pyvenv
sudo ln -s pip3.7 pip

sudo pip install --upgrade pip